Have clang use LLVM IR's fast-math flags when in FastMath or FiniteMathOnly modes. Test cases included.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169191 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index 3d7a978..c441403 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -22,6 +22,7 @@
#include "clang/AST/DeclCXX.h"
#include "clang/AST/StmtCXX.h"
#include "clang/Frontend/CodeGenOptions.h"
+#include "llvm/Operator.h"
#include "llvm/Intrinsics.h"
#include "llvm/MDBuilder.h"
#include "llvm/DataLayout.h"
@@ -46,6 +47,15 @@
TerminateHandler(0), TrapBB(0) {
if (!suppressNewContext)
CGM.getCXXABI().getMangleContext().startNewFunction();
+
+ llvm::FastMathFlags FMF;
+ if (CGM.getLangOpts().FastMath)
+ FMF.UnsafeAlgebra = true;
+ if (CGM.getLangOpts().FiniteMathOnly) {
+ FMF.NoNaNs = true;
+ FMF.NoInfs = true;
+ }
+ Builder.SetFastMathFlags(FMF);
}
CodeGenFunction::~CodeGenFunction() {