Grab-bag of reassociate tweaks. Unify handling of dead instructions and

instructions to reoptimize.  Exploit this to more systematically eliminate
dead instructions (this isn't very useful in practice but is convenient for
analysing some testcase I am working on).  No need for WeakVH any more: use
an AssertingVH instead.

llvm-svn: 158073

1 files changed, 6 insertions, 4 deletions

diff --git a/llvm/test/Transforms/Reassociate/fp-commute.ll b/llvm/test/Transforms/Reassociate/fp-commute.ll
index 5644f7ca701..025689bb0c1 100644
--- a/llvm/test/Transforms/Reassociate/fp-commute.ll
+++ b/llvm/test/Transforms/Reassociate/fp-commute.ll
@@ -2,15 +2,17 @@
 
 target triple = "armv7-apple-ios"
 
+declare void @use(float)
+
 ; CHECK: test
-define float @test(float %x, float %y) {
+define void @test(float %x, float %y) {
 entry:
 ; CHECK: fmul float %x, %y
 ; CHECK: fmul float %x, %y
   %0 = fmul float %x, %y
   %1 = fmul float %y, %x
   %2 = fsub float %0, %1
-  ret float %1
+  call void @use(float %0)
+  call void @use(float %2)
+  ret void
 }
-
-