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| author | Yuri Rumyantsev <ysrumyan@gmail.com> | 2016-01-11 12:07:31 +0000 |
|---|---|---|
| committer | Ilya Enkovich <ienkovich@gcc.gnu.org> | 2016-01-11 12:07:31 +0000 |
| commit | ca90b1ed9ac7e9aaacb3ef0eb055d2f594d30493 (patch) | |
| tree | aff7cf99fbd76cee5e9f06139145d6518bc63045 /gcc/params.def | |
| parent | b4934671aed067e0a8c3ac3fcc5871dd27a706ed (diff) | |
| download | gcc-ca90b1ed9ac7e9aaacb3ef0eb055d2f594d30493.zip gcc-ca90b1ed9ac7e9aaacb3ef0eb055d2f594d30493.tar.gz gcc-ca90b1ed9ac7e9aaacb3ef0eb055d2f594d30493.tar.bz2 | |
re PR rtl-optimization/68920 (Undesirable if-conversion for a rarely taken branch)
gcc/
2016-01-11 Yuri Rumyantsev <ysrumyan@gmail.com>
PR rtl-optimization/68920
* config/i386/i386.c (ix86_option_override_internal): Restrict number
of conditional moves for RTL if-conversion to 1 for
TARGET_ONE_IF_CONV_INSN.
* config/i386/i386.h (TARGET_ONE_IF_CONV_INSN): New macros.
* config/i386/x86-tune.def (X86_TUNE_ONE_IF_CONV_INSN): New macros.
* params.def (PARAM_MAX_RTL_IF_CONVERSION_INSNS) : Introduce new
parameter to restirct number of conditional moves for
RTL if-conversion.
* doc/invoke.texi (max-rtl-if-conversion-insns): Document it.
* ifcvt.c (bb_ok_for_noce_convert_multiple_sets): Limit number of
conditionl moves.
gcc/testsuite/
2016-01-11 Yuri Rumyantsev <ysrumyan@gmail.com>
PR rtl-optimization/68920
* gcc.dg/ifcvt-4.c: Add "--param max-rtl-if-conversion-insns=3" option
for ix86 targets.
* gcc.dg/ifcvt-5.c: New test.
From-SVN: r232220
Diffstat (limited to 'gcc/params.def')
| -rw-r--r-- | gcc/params.def | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/params.def b/gcc/params.def index 472b20c..308844a 100644 --- a/gcc/params.def +++ b/gcc/params.def @@ -1177,6 +1177,12 @@ DEFPARAM (PARAM_MAX_SSA_NAME_QUERY_DEPTH, "Maximum recursion depth allowed when querying a property of an" " SSA name.", 2, 1, 0) + +DEFPARAM (PARAM_MAX_RTL_IF_CONVERSION_INSNS, + "max-rtl-if-conversion-insns", + "Maximum number of insns in a basic block to consider for RTL " + "if-conversion.", + 10, 0, 99) /* Local variables: |