1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/fsxor-alignment.ll b/llvm/test/CodeGen/X86/fsxor-alignment.ll
new file mode 100644
index 00000000000..bb55e4466f8
--- /dev/null
+++ b/llvm/test/CodeGen/X86/fsxor-alignment.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse -enable-unsafe-fp-math | \
+; RUN:  grep -v sp | grep xorps | wc -l | grep 2
+
+; Don't fold the incoming stack arguments into the xorps instructions used
+; to do floating-point negations, because the arguments aren't vectors
+; and aren't vector-aligned.
+
+define void @foo(float* %p, float* %q, float %s, float %y) {
+  %ss = sub float -0.0, %s
+  %yy = sub float -0.0, %y
+  store float %ss, float* %p
+  store float %yy, float* %q
+  ret void
+}