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

in -enable-unsafe-fp-math mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37841 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/negative-sin.ll b/test/CodeGen/X86/negative-sin.ll
new file mode 100644 (file)
index 0000000..39c6297
--- /dev/null
+++ b/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
+}