New test case. DAGCombiner should be able to fold -sin(-x)

in -enable-unsafe-fp-math mode.

llvm-svn: 37841

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/negative-sin.ll b/llvm/test/CodeGen/X86/negative-sin.ll
new file mode 100644
index 00000000000..39c62973def
--- /dev/null
+++ b/llvm/test/CodeGen/X86/negative-sin.ll
@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | llc -enable-unsafe-fp-math -march=x86-64 | \
+; RUN:   not egrep {addsd|subsd|xor}
+
+declare double @sin(double %f)
+
+define double @foo(double %e)
+{
+  %f = sub double 0.0, %e
+  %g = call double @sin(double %f)
+  %h = sub double 0.0, %g
+  ret double %h
+}