diff options
| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-10-04 19:42:20 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-10-04 19:42:20 +0000 |
| commit | e20e508aecf413f84b0dc4928cbf4bb5ce6c5bdc (patch) | |
| tree | cf81b2047df1ac17e3e7ac18d94ba1451fd8f533 /lib/Driver/Tools.cpp | |
| parent | 45bed131a1a4219cc0bfb3c9f666dca54ddb59fa (diff) | |
Driver: Link crtfastmath.o if it's available and -ffast-math is specified.
crtfastmath.o contains routines to set the floating point flags to a faster,
unsafe mode. Linking it in speeds up code dealing with denormals significantly
(PR14024).
For now this is only enabled on linux where I can test it and crtfastmath.o is
widely available. We may want to provide a similar file with compiler-rt
eventually and/or enable it on other platforms too.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165240 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Driver/Tools.cpp')
| -rw-r--r-- | lib/Driver/Tools.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp index 86781cc178..9f068b9d7c 100644 --- a/lib/Driver/Tools.cpp +++ b/lib/Driver/Tools.cpp @@ -5828,6 +5828,9 @@ void linuxtools::Link::ConstructJob(Compilation &C, const JobAction &JA, else crtbegin = isAndroid ? "crtbegin_dynamic.o" : "crtbegin.o"; CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin))); + + // Add crtfastmath.o if available and fast math is enabled. + ToolChain.AddFastMathRuntimeIfAvailable(Args, CmdArgs); } Args.AddAllArgs(CmdArgs, options::OPT_L); |