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| author | Artem Belevich <tra@google.com> | 2016-05-19 18:44:45 +0000 |
|---|---|---|
| committer | Artem Belevich <tra@google.com> | 2016-05-19 18:44:45 +0000 |
| commit | f159984fe052abd07234c80f7cc15902ba8e297d (patch) | |
| tree | ca379ef47943339c8f7feacdc0c92bfd854ece23 /lib/Frontend/CompilerInvocation.cpp | |
| parent | 9a0c2517ad81a849ec57558a3ce4283ce78eda77 (diff) | |
| download | clang-f159984fe052abd07234c80f7cc15902ba8e297d.tar.gz | |
[CUDA] Enable fusing FP ops (-ffp-contract=fast) for CUDA by default.
This matches default nvcc behavior and gives substantial
performance boost on GPU where fmad is much cheaper compared to add+mul.
Differential Revision: http://reviews.llvm.org/D20341
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@270094 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Frontend/CompilerInvocation.cpp')
| -rw-r--r-- | lib/Frontend/CompilerInvocation.cpp | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp index 7c3850eeab..c5f839e673 100644 --- a/lib/Frontend/CompilerInvocation.cpp +++ b/lib/Frontend/CompilerInvocation.cpp @@ -2255,10 +2255,15 @@ bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res, LangOpts.ObjCExceptions = 1; } - // During CUDA device-side compilation, the aux triple is the triple used for - // host compilation. - if (LangOpts.CUDA && LangOpts.CUDAIsDevice) { - Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple; + if (LangOpts.CUDA) { + // During CUDA device-side compilation, the aux triple is the + // triple used for host compilation. + if (LangOpts.CUDAIsDevice) + Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple; + + // Set default FP_CONTRACT to FAST. + if (!Args.hasArg(OPT_ffp_contract)) + Res.getCodeGenOpts().setFPContractMode(CodeGenOptions::FPC_Fast); } // FIXME: Override value name discarding when asan or msan is used because the |