[llvm] r301131 - [InstCombine] add tests for or-to-xor; NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Sun Apr 23 11:37:36 2017
New Revision: 301131

URL: http://llvm.org/viewvc/llvm-project?rev=301131&view=rev
Log:
[InstCombine] add tests for or-to-xor; NFC

Modified:
    llvm/trunk/test/Transforms/InstCombine/and-or-not.ll

Modified: llvm/trunk/test/Transforms/InstCombine/and-or-not.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/and-or-not.ll?rev=301131&r1=301130&r2=301131&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/and-or-not.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/and-or-not.ll Sun Apr 23 11:37:36 2017
@@ -70,6 +70,82 @@ define <4 x i32> @and_to_xor1_vec(<4 x i
   ret <4 x i32> %and2
 }
 
+; (a & ~b) | (~a & b) --> a ^ b
+
+define i32 @or_to_xor1(float %fa, float %fb) {
+; CHECK-LABEL: @or_to_xor1(
+; CHECK-NEXT:    [[A:%.*]] = fptosi float %fa to i32
+; CHECK-NEXT:    [[B:%.*]] = fptosi float %fb to i32
+; CHECK-NEXT:    [[OR:%.*]] = xor i32 [[A]], [[B]]
+; CHECK-NEXT:    ret i32 [[OR]]
+;
+  %a = fptosi float %fa to i32
+  %b = fptosi float %fb to i32
+  %nota = xor i32 %a, -1
+  %notb = xor i32 %b, -1
+  %and1 = and i32 %a, %notb
+  %and2 = and i32 %nota, %b
+  %or = or i32 %and1, %and2
+  ret i32 %or
+}
+
+; (a & ~b) | (b & ~a) --> a ^ b
+
+define i32 @or_to_xor2(float %fa, float %fb) {
+; CHECK-LABEL: @or_to_xor2(
+; CHECK-NEXT:    [[A:%.*]] = fptosi float %fa to i32
+; CHECK-NEXT:    [[B:%.*]] = fptosi float %fb to i32
+; CHECK-NEXT:    [[OR:%.*]] = xor i32 [[A]], [[B]]
+; CHECK-NEXT:    ret i32 [[OR]]
+;
+  %a = fptosi float %fa to i32
+  %b = fptosi float %fb to i32
+  %nota = xor i32 %a, -1
+  %notb = xor i32 %b, -1
+  %and1 = and i32 %a, %notb
+  %and2 = and i32 %b, %nota
+  %or = or i32 %and1, %and2
+  ret i32 %or
+}
+
+; (~a & b) | (~b & a) --> a ^ b
+
+define i32 @or_to_xor3(float %fa, float %fb) {
+; CHECK-LABEL: @or_to_xor3(
+; CHECK-NEXT:    [[A:%.*]] = fptosi float %fa to i32
+; CHECK-NEXT:    [[B:%.*]] = fptosi float %fb to i32
+; CHECK-NEXT:    [[OR:%.*]] = xor i32 [[B]], [[A]]
+; CHECK-NEXT:    ret i32 [[OR]]
+;
+  %a = fptosi float %fa to i32
+  %b = fptosi float %fb to i32
+  %nota = xor i32 %a, -1
+  %notb = xor i32 %b, -1
+  %and1 = and i32 %nota, %b
+  %and2 = and i32 %notb, %a
+  %or = or i32 %and1, %and2
+  ret i32 %or
+}
+
+; (~a & b) | (a & ~b) --> a ^ b
+
+define i32 @or_to_xor4(float %fa, float %fb) {
+; CHECK-LABEL: @or_to_xor4(
+; CHECK-NEXT:    [[A:%.*]] = fptosi float %fa to i32
+; CHECK-NEXT:    [[B:%.*]] = fptosi float %fb to i32
+; CHECK-NEXT:    [[OR:%.*]] = xor i32 [[B]], [[A]]
+; CHECK-NEXT:    ret i32 [[OR]]
+;
+  %a = fptosi float %fa to i32
+  %b = fptosi float %fb to i32
+  %nota = xor i32 %a, -1
+  %notb = xor i32 %b, -1
+  %and1 = and i32 %nota, %b
+  %and2 = and i32 %a, %notb
+  %or = or i32 %and1, %and2
+  ret i32 %or
+}
+
 ; (a & b) ^ (a | b) --> a ^ b
 
 define i32 @xor_to_xor1(i32 %a, i32 %b) {