1 files changed, 35 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fastmath-optnone.ll b/test/CodeGen/X86/fastmath-optnone.ll
new file mode 100644
index 0000000..0caadff
--- /dev/null
+++ b/test/CodeGen/X86/fastmath-optnone.ll
@@ -0,0 +1,35 @@
+; RUN: llc < %s -mcpu=corei7 -march=x86-64 -mattr=+sse2 | FileCheck %s
+; Verify that floating-point operations inside 'optnone' functions
+; are not optimized even if unsafe-fp-math is set.
+
+define float @foo(float %x) #0 {
+entry:
+  %add = fadd fast float %x, %x
+  %add1 = fadd fast float %add, %x
+  ret float %add1
+}
+
+; CHECK-LABEL: @foo
+; CHECK-NOT: add
+; CHECK: mul
+; CHECK-NOT: add
+; CHECK: ret
+
+define float @fooWithOptnone(float %x) #1 {
+entry:
+  %add = fadd fast float %x, %x
+  %add1 = fadd fast float %add, %x
+  ret float %add1
+}
+
+; CHECK-LABEL: @fooWithOptnone
+; CHECK-NOT: mul
+; CHECK: add
+; CHECK-NOT: mul
+; CHECK: add
+; CHECK-NOT: mul
+; CHECK: ret
+
+
+attributes #0 = { "unsafe-fp-math"="true" }
+attributes #1 = { noinline optnone "unsafe-fp-math"="true" }