Add FP_CONTRACT support for clang.

Clang will now honor the FP_CONTRACT pragma and emit LLVM
fmuladd intrinsics for expressions of the form A * B + C (when they occur in a
single statement).

llvm-svn: 164989

1 files changed, 9 insertions, 0 deletions

diff --git a/clang/test/CodeGen/ffp-contract-option.c b/clang/test/CodeGen/ffp-contract-option.c
new file mode 100644
index 00000000000..eb95f1e2177
--- /dev/null
+++ b/clang/test/CodeGen/ffp-contract-option.c
@@ -0,0 +1,9 @@
+// RUN: %clang_cc1 -O3 -ffp-contract=fast -triple=powerpc-apple-darwin10 -S -o - %s | FileCheck %s
+// REQUIRES: ppc32-registered-target
+
+float fma_test1(float a, float b, float c) {
+// CHECK: fmadds
+  float x = a * b;
+  float y = x + c;
+  return y;
+}