While I don't think any later transforms can fire, it seems cleaner to

not assume this (for example in case more transforms get added below
it).  Suggested by Frits van Bommel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122332 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstSimplify/2010-12-20-I1Arithmetic.ll

@@ -0,0 +1,22 @@
+; RUN: opt < %s -instsimplify -S | FileCheck %s
+
+define i1 @add(i1 %x) {
+; CHECK: @add
+  %z = add i1 %x, %x
+  ret i1 %z
+; CHECK: ret i1 false
+}
+
+define i1 @sub(i1 %x) {
+; CHECK: @sub
+  %z = sub i1 false, %x
+  ret i1 %z
+; CHECK: ret i1 %x
+}
+
+define i1 @mul(i1 %x) {
+; CHECK: @mul
+  %z = mul i1 %x, %x
+  ret i1 %z
+; CHECK: ret i1 %x
+}