diff options
author | Lang Hames <lhames@gmail.com> | 2012-07-06 00:59:19 +0000 |
---|---|---|
committer | Lang Hames <lhames@gmail.com> | 2012-07-06 00:59:19 +0000 |
commit | c9686716d2ceb5518178dca98670ec34c472a1be (patch) | |
tree | b4201afe672b4090ac1699d9190a28341428fa59 /lib/CodeGen | |
parent | 36cbfbfce889642057bd007eac3569ea9f58e1e8 (diff) |
Add -ffp-contract = { fast | on | off } command line option support.
This flag sets the 'fp-contract' mode, which controls the formation of fused
floating point operations. Available modes are:
- Fast: Form fused operations anywhere.
- On: Form fused operations where allowed by FP_CONTRACT. This is the default
mode.
- Off: Don't form fused operations (in future this may be relaxed to forming
fused operations where it can be proved that the result won't be
affected).
Currently clang doesn't support the FP_CONTRACT pragma, so the 'On' and 'Off'
modes are equivalent.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159794 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
-rw-r--r-- | lib/CodeGen/BackendUtil.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/CodeGen/BackendUtil.cpp b/lib/CodeGen/BackendUtil.cpp index 5a97875ef4..0a1915b485 100644 --- a/lib/CodeGen/BackendUtil.cpp +++ b/lib/CodeGen/BackendUtil.cpp @@ -351,6 +351,19 @@ bool EmitAssemblyHelper::AddEmitPasses(BackendAction Action, Options.FloatABIType = llvm::FloatABI::Default; } + // Set FP fusion mode. + switch (LangOpts.getFPContractMode()) { + case LangOptions::FPC_Off: + Options.AllowFPOpFusion = llvm::FPOpFusion::Strict; + break; + case LangOptions::FPC_On: + Options.AllowFPOpFusion = llvm::FPOpFusion::Standard; + break; + case LangOptions::FPC_Fast: + Options.AllowFPOpFusion = llvm::FPOpFusion::Fast; + break; + } + Options.LessPreciseFPMADOption = CodeGenOpts.LessPreciseFPMAD; Options.NoInfsFPMath = CodeGenOpts.NoInfsFPMath; Options.NoNaNsFPMath = CodeGenOpts.NoNaNsFPMath; |