[llvm] r299627 - [InstSimplify] Add test cases for mixing add/sub i1 with xor of i1. Seems we can simplify in one direction but not the other.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Thu Apr  6 00:48:06 2017
New Revision: 299627

URL: http://llvm.org/viewvc/llvm-project?rev=299627&view=rev
Log:
[InstSimplify] Add test cases for mixing add/sub i1 with xor of i1. Seems we can simplify in one direction but not the other.

Modified:
    llvm/trunk/test/Transforms/InstSimplify/addsub.ll

Modified: llvm/trunk/test/Transforms/InstSimplify/addsub.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstSimplify/addsub.ll?rev=299627&r1=299626&r2=299627&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstSimplify/addsub.ll (original)
+++ llvm/trunk/test/Transforms/InstSimplify/addsub.ll Thu Apr  6 00:48:06 2017
@@ -34,3 +34,45 @@ define <2 x i1> @test6(<2 x i1> %a) {
   %res = add <2 x i1> %a, %a
   ret <2 x i1> %res
 }
+
+define i1 @test7(i1 %a) {
+; CHECK-LABEL: @test7(
+; CHECK-NEXT:    ret i1 [[A:%.*]]
+;
+  %c = xor i1 %a, true
+  %res = add i1 %c, true
+  ret i1 %res
+}
+
+; TODO: simplify this to %a
+define i1 @test8(i1 %a) {
+; CHECK-LABEL: @test8(
+; CHECK-NEXT:    [[C:%.*]] = add i1 [[A:%.*]], true
+; CHECK-NEXT:    [[RES:%.*]] = xor i1 [[C]], true
+; CHECK-NEXT:    ret i1 [[RES]]
+;
+  %c = add i1 %a, true
+  %res = xor i1 %c, true
+  ret i1 %res
+}
+
+define i1 @test9(i1 %a) {
+; CHECK-LABEL: @test9(
+; CHECK-NEXT:    ret i1 [[A:%.*]]
+;
+  %c = xor i1 %a, true
+  %res = sub i1 %c, true
+  ret i1 %res
+}
+
+; TODO: simplify this to %a
+define i1 @test10(i1 %a) {
+; CHECK-LABEL: @test10(
+; CHECK-NEXT:    [[C:%.*]] = sub i1 [[A:%.*]], true
+; CHECK-NEXT:    [[RES:%.*]] = xor i1 [[C]], true
+; CHECK-NEXT:    ret i1 [[RES]]
+;
+  %c = sub i1 %a, true
+  %res = xor i1 %c, true
+  ret i1 %res
+}