Fix a pair of issues that caused an infinite loop in reassociate.
Terrifyingly, one of them is a mishandling of floating point vectors
in Constant::isZero(). How exactly this issue survived this long
is beyond me.
llvm-svn: 253655
diff --git a/llvm/test/Transforms/Reassociate/fp-expr.ll b/llvm/test/Transforms/Reassociate/fp-expr.ll
new file mode 100644
index 0000000..ee92706
--- /dev/null
+++ b/llvm/test/Transforms/Reassociate/fp-expr.ll
@@ -0,0 +1,20 @@
+; RUN: opt -S -reassociate < %s | FileCheck %s
+
+define void @test1() {
+; CHECK-LABEL: @test1
+; CHECK: call
+; CHECK: fsub
+; CHECK: fadd
+ %tmp = tail call <4 x float> @blam()
+ %tmp23 = fsub fast <4 x float> undef, %tmp
+ %tmp24 = fadd fast <4 x float> %tmp23, undef
+ tail call void @wombat(<4 x float> %tmp24)
+ ret void
+}
+
+; Function Attrs: optsize
+declare <4 x float> @blam()
+
+; Function Attrs: optsize
+declare void @wombat(<4 x float>)
+