Compilers: XL V8 C/C++ and XL V10.1 Fortran
Last updated: 19-Jan-2007
Invoke the IBM XL C compliler. 32-bit binaries are producded by default.
Invoke the IBM XL C++ compliler. 32-bit binaries are producded by default.
Invoke the IBM XL C compliler. 32-bit binaries are producded by default.
Invoke the IBM XL C++ compliler. 32-bit binaries are producded by default.
This macro indicates that the benchmark is being built on a PowerPC-based AIX system.
Portability changes for AIX
This flag allow correct compilation and execution of 464.h264ref on the AIX platform.
Causes the compiler to treat "char" variables as signed instead of the default of unsigned.
This flag can be set for SPEC compilation for AIX using default compiler.
This macro indicates that the benchmark is being built on a PowerPC-based AIX system.
Portability changes for AIX
This flag allow correct compilation and execution of 464.h264ref on the AIX platform.
Causes the compiler to treat "char" variables as signed instead of the default of unsigned.
This flag can be set for SPEC compilation for AIX using default compiler.
Allows most any c dialect.
Perform optimizations for maximum performance. This includes interprocedural analysis on all of the objects presented on the "link" step.
-O4 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
Indicates that the compiler understands how to do alloca().
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Perform optimizations for maximum performance. This includes interprocedural analysis on all of the objects presented on the "link" step.
-O4 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
Cause the C++ compiler to generate Run Time Type Identification code
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Allows most any c dialect.
The option used in the first pass of a profile directed feedback compile that causes pdf information to be generated. The profile directed feedback optimization gathers data on both exectuion path and data values. It does not use hardware counters, nor gather any data other than path and data values for PDF specific optimizations.
The option used in the second pass of a profile directed feedback compile that causes PDF information to be utilized during optimization.
Perform optimizations for maximum performance. This includes maximum interprocedural analysis on all of the objects presented on the "link" step. This level of optimization will increase the compiler's memory usage and compile time requirements. -O5 Provides all of the functionality of the -O4 option, but also provides the functionality of the -qipa=level=2 option.
-O5 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Allows most any c dialect.
The option used in the first pass of a profile directed feedback compile that causes pdf information to be generated. The profile directed feedback optimization gathers data on both exectuion path and data values. It does not use hardware counters, nor gather any data other than path and data values for PDF specific optimizations.
The option used in the second pass of a profile directed feedback compile that causes PDF information to be utilized during optimization.
Perform optimizations for maximum performance. This includes maximum interprocedural analysis on all of the objects presented on the "link" step. This level of optimization will increase the compiler's memory usage and compile time requirements. -O5 Provides all of the functionality of the -O4 option, but also provides the functionality of the -qipa=level=2 option.
-O5 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
Indicates that the compiler understands how to do alloca().
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Allows most any c dialect.
Perform optimizations for maximum performance. This includes maximum interprocedural analysis on all of the objects presented on the "link" step. This level of optimization will increase the compiler's memory usage and compile time requirements. -O5 Provides all of the functionality of the -O4 option, but also provides the functionality of the -qipa=level=2 option.
-O5 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
Produces object code containg instructins that will run on the specified processors. "auto" selects the processor the complile is being done on. "pwr5x" is the POWER5+ processor.
Supported values for this flag are
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Allows most any c dialect.
The option used in the first pass of a profile directed feedback compile that causes pdf information to be generated. The profile directed feedback optimization gathers data on both exectuion path and data values. It does not use hardware counters, nor gather any data other than path and data values for PDF specific optimizations.
The option used in the second pass of a profile directed feedback compile that causes PDF information to be utilized during optimization.
Perform optimizations for maximum performance. This includes interprocedural analysis on all of the objects presented on the "link" step.
-O4 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Allows most any c dialect.
Perform optimizations for maximum performance. This includes interprocedural analysis on all of the objects presented on the "link" step.
-O4 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Allows most any c dialect.
The option used in the first pass of a profile directed feedback compile that causes pdf information to be generated. The profile directed feedback optimization gathers data on both exectuion path and data values. It does not use hardware counters, nor gather any data other than path and data values for PDF specific optimizations.
The option used in the second pass of a profile directed feedback compile that causes PDF information to be utilized during optimization.
Perform optimizations for maximum performance. This includes interprocedural analysis on all of the objects presented on the "link" step.
-O4 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
Generates 64 bit ABI binaries.
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
The option used in the first pass of a profile directed feedback compile that causes pdf information to be generated. The profile directed feedback optimization gathers data on both exectuion path and data values. It does not use hardware counters, nor gather any data other than path and data values for PDF specific optimizations.
The option used in the second pass of a profile directed feedback compile that causes PDF information to be utilized during optimization.
Perform optimizations for maximum performance. This includes maximum interprocedural analysis on all of the objects presented on the "link" step. This level of optimization will increase the compiler's memory usage and compile time requirements. -O5 Provides all of the functionality of the -O4 option, but also provides the functionality of the -qipa=level=2 option.
-O5 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
Specifies what aggregate alignment rules the compiler uses for file compilation, where the alignment options are: bit_packed The compiler uses the bit_packed alignment rules. full The compiler uses the RISC System/6000 alignment rules. This is the same as power. mac68k The compiler uses the Macintosh alignment rules. This suboption is valid only for 32- bit compilations. natural The compiler maps structure members to their natural boundaries. packed The compiler uses the packed alignment rules. power The compiler uses the RISC System/6000 alignment rules. twobyte The compiler uses the Macintosh alignment rules. This suboption is valid only for 32- bit compilations. The mac68k option is the same as twobyte. The default is -qalign=full.
Cause the C++ compiler to generate Run Time Type Identification code
The __IBM_FAST_VECTOR macro defines a different iterator for the std::vector template class. This iterator results in faster code, but is not compatible with code using the default iterator for a std::vector template class. All uses of std::vector for a data type must use the same iterator. Add -D__IBM_FAST_VECTOR to the compile line, or "#define __IBM_FAST_VECTOR 1" to your source code to use the faster iterator for std::vector template class. You must compile all sources with this macro.
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
The option used in the first pass of a profile directed feedback compile that causes pdf information to be generated. The profile directed feedback optimization gathers data on both exectuion path and data values. It does not use hardware counters, nor gather any data other than path and data values for PDF specific optimizations.
The option used in the second pass of a profile directed feedback compile that causes PDF information to be utilized during optimization.
Perform optimizations for maximum performance. This includes maximum interprocedural analysis on all of the objects presented on the "link" step. This level of optimization will increase the compiler's memory usage and compile time requirements. -O5 Provides all of the functionality of the -O4 option, but also provides the functionality of the -qipa=level=2 option.
-O5 is equivalent to the following flags
Indicates that a program, designed to execute in a large page memory environment, can take advantage of large 16 MB pages provided on POWER4 and higher based systems.
Causes AIX to define "ischar()" (and friends) as macro's and no subroutines.
Causes C++ compiled routines to use pooled memory allocation.
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Sets the bit in the file's XCOFF header indicating that this executable will request the use of large pages when they are available on the system and when the user has an appropriate privilege
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Causes the system loader to put the heap in it's own segment of the size specified. This is only required for 32-bit applications, as their segments are 256M.
qalias=ansi | noansi If ansi is specified, type-based aliasing is used during optimization, which restricts the lvalues that can be safely used to access a data object. The default is ansi for the xlc, xlC, and c89 commands. This option has no effect unless you also specify the -O option. qalias=std |nostd Indicates whether the compilation units contain any non-standard aliasing (see Compiler Reference for more information). If so, specify nostd.
Suppresses the message with the message number specified
Causes the system loader to put the heap in it's own segment of the size specified. This is only required for 32-bit applications, as their segments are 256M.
Suppresses the message with the message number specified
The compiler generates additional symbol information for use by the AIX "fdprpro" code optimizer.
Suppresses the message with the message number specified
Causes the system loader to put the heap in it's own segment of the size specified. This is only required for 32-bit applications, as their segments are 256M.
qalias=ansi | noansi If ansi is specified, type-based aliasing is used during optimization, which restricts the lvalues that can be safely used to access a data object. The default is ansi for the xlc, xlC, and c89 commands. This option has no effect unless you also specify the -O option. qalias=std |nostd Indicates whether the compilation units contain any non-standard aliasing (see Compiler Reference for more information). If so, specify nostd.
Suppresses the message with the message number specified
Causes the system loader to put the heap in it's own segment of the size specified. This is only required for 32-bit applications, as their segments are 256M.
Suppresses the message with the message number specified
Causes the system loader to put the heap in it's own segment of the size specified. This is only required for 32-bit applications, as their segments are 256M.
Suppresses the message with the message number specified
Causes the system loader to put the heap in it's own segment of the size specified. This is only required for 32-bit applications, as their segments are 256M.
The compiler generates additional symbol information for use by the AIX "fdprpro" code optimizer.
Suppresses the message with the message number specified
Suppresses the message with the message number specified
Suppresses the message with the message number specified
Causes the system loader to put the heap in it's own segment of the size specified. This is only required for 32-bit applications, as their segments are 256M.
Suppresses the message with the message number specified
This section contains descriptions of flags that were included implicitly by other flags, but which do not have a permanent home at SPEC.
-O3 Performs additional optimizations that are memory intensive, compile-time intensive, and may change the semantics of the program slightly, unless -qstrict is specified. We recommend these optimizations when the desire for run-time speed improvements outweighs the concern for limiting compile-time resources.
Performs high-order transformations on loops during optimization.
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
Produces object code containg instructins that will run on the specified processors. "auto" selects the processor the complile is being done on. "pwr5x" is the POWER5+ processor.
Supported values for this flag are
Specifies the architecture system for which the executable program is optimized. This includes instruction scheduling and cache setting. The supported values for suboption are:
qipa enhances optimization by doing detailed analysis across procedures (interprocedural analysis or IPA).
level determines the amount of interprocedural analysis and optimization that is performed
level=0 Does only minimal interprocedural analysis and optimization
level=1 turns on inlining , limited alias analysis, and limited call-site tailoring
level=2 turns on full interprocedural data flow and alias analysis
noobject Specifies whether to include standard object code in the object files. Specifying the noobject suboption can substantially reduce overall compilation time, by not generating object code during the first IPA phase.
threads threads[=N] runs the number of parallel threads that are available, or as specified by N. N must be a positive integer. nothreads does not run any parallel threads. This is equivalent to running one serial thread. Specifying -qipa=threads can reduce IPA optimization time. The threads suboption allows the IPA optimizer to run portions of the optimization process in parallel threads, which can speed up the compilation process on multi-processor systems.
This where I want to put SMT, DCM, SUT, ulimits, Large Page, smtctl, drmgr, bindprocessor descriptions.
Flag description origin markings:
For questions about the meanings of these flags, please contact the tester.
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Copyright 2006-2014 Standard Performance Evaluation Corporation
Tested with SPEC CPU2006 v1.0.
Report generated on Tue Jul 22 10:46:30 2014 by SPEC CPU2006 flags formatter v6906.