From 885b6533d26733735d2c43e84e6c504759fd1516 Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Thu, 15 Oct 2020 14:35:39 -0400
Subject: [PATCH] [InstCombine] update tests for logic folds to exercise
 commuted patterns; NFC

This was the intent for D88551.
I also varied the types a bit for extra coverage
and tried to make better test/value names.
---
 test/Transforms/InstCombine/xor.ll | 110 ++++++++++++++---------------
 1 file changed, 52 insertions(+), 58 deletions(-)

diff --git a/test/Transforms/InstCombine/xor.ll b/test/Transforms/InstCombine/xor.ll
index ba275a60664..c37983829fb 100644
--- a/test/Transforms/InstCombine/xor.ll
+++ b/test/Transforms/InstCombine/xor.ll
@@ -1172,76 +1172,70 @@ define i8 @not_ashr_wrong_const(i8 %x) {
   ret i8 %r
 }
 
-; (~A & B) ^ A  -->   (A | B)
-; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
+; (~A & B) ^ A --> A | B
 
-define i32 @test52(i32 %p1, i32 %p2) {
-; CHECK-LABEL: @test52(
-; CHECK-NEXT:    [[A:%.*]] = udiv i32 42, [[P1:%.*]]
-; CHECK-NEXT:    [[B:%.*]] = udiv i32 42, [[P2:%.*]]
-; CHECK-NEXT:    [[O:%.*]] = xor i32 [[A]], -1
-; CHECK-NEXT:    [[R:%.*]] = and i32 [[B]], [[O]]
-; CHECK-NEXT:    [[Z:%.*]] = xor i32 [[R]], [[A]]
-; CHECK-NEXT:    ret i32 [[Z]]
+define <2 x i32> @xor_andn_commute1(<2 x i32> %a, <2 x i32> %b) {
+; CHECK-LABEL: @xor_andn_commute1(
+; CHECK-NEXT:    [[NOTA:%.*]] = xor <2 x i32> [[A:%.*]], <i32 -1, i32 -1>
+; CHECK-NEXT:    [[R:%.*]] = and <2 x i32> [[NOTA]], [[B:%.*]]
+; CHECK-NEXT:    [[Z:%.*]] = xor <2 x i32> [[R]], [[A]]
+; CHECK-NEXT:    ret <2 x i32> [[Z]]
 ;
-  %a = udiv i32 42, %p1
-  %b = udiv i32 42, %p2
-  %o = xor i32 %a, -1
-  %r = and i32 %o, %b
-  %z = xor i32 %r, %a
-  ret i32 %z
+  %nota = xor <2 x i32> %a, <i32 -1, i32 -1>
+  %r = and <2 x i32> %nota, %b
+  %z = xor <2 x i32> %r, %a
+  ret <2 x i32> %z
 }
 
-; (~B & A) ^ B  -->   (A | B)
-; The division ops are here to thwart complexity-based canonicalization: all ops are binops.
+; (B & ~A) ^ A --> A | B
 
-define i32 @test53(i32 %p1, i32 %p2) {
-; CHECK-LABEL: @test53(
-; CHECK-NEXT:    [[A:%.*]] = udiv i32 42, [[P1:%.*]]
-; CHECK-NEXT:    [[B:%.*]] = udiv i32 42, [[P2:%.*]]
-; CHECK-NEXT:    [[O:%.*]] = xor i32 [[B]], -1
-; CHECK-NEXT:    [[R:%.*]] = and i32 [[A]], [[O]]
-; CHECK-NEXT:    [[Z:%.*]] = xor i32 [[R]], [[B]]
-; CHECK-NEXT:    ret i32 [[Z]]
+define i33 @xor_andn_commute2(i33 %a, i33 %pb) {
+; CHECK-LABEL: @xor_andn_commute2(
+; CHECK-NEXT:    [[B:%.*]] = udiv i33 42, [[PB:%.*]]
+; CHECK-NEXT:    [[NOTA:%.*]] = xor i33 [[A:%.*]], -1
+; CHECK-NEXT:    [[R:%.*]] = and i33 [[B]], [[NOTA]]
+; CHECK-NEXT:    [[Z:%.*]] = xor i33 [[R]], [[A]]
+; CHECK-NEXT:    ret i33 [[Z]]
 ;
-  %a = udiv i32 42, %p1
-  %b = udiv i32 42, %p2
-  %o = xor i32 %b, -1
-  %r = and i32 %o, %a
-  %z = xor i32 %r, %b
-  ret i32 %z
+  %b = udiv i33 42, %pb ; thwart complexity-based canonicalization
+  %nota = xor i33 %a, -1
+  %r = and i33 %b, %nota
+  %z = xor i33 %r, %a
+  ret i33 %z
 }
 
-define i32 @test54(i32 %p1, i32 %p2) {
-; CHECK-LABEL: @test54(
-; CHECK-NEXT:    [[A:%.*]] = udiv i32 42, [[P1:%.*]]
-; CHECK-NEXT:    [[B:%.*]] = udiv i32 42, [[P2:%.*]]
-; CHECK-NEXT:    [[O:%.*]] = xor i32 [[A]], -1
-; CHECK-NEXT:    [[R:%.*]] = and i32 [[B]], [[O]]
-; CHECK-NEXT:    [[Z:%.*]] = xor i32 [[R]], [[A]]
-; CHECK-NEXT:    ret i32 [[Z]]
-;
-  %a = udiv i32 42, %p1
-  %b = udiv i32 42, %p2
-  %o = xor i32 %a, -1
-  %r = and i32 %b, %o
-  %z = xor i32 %r, %a
-  ret i32 %z
-}
+; A ^ (~A & B) --> A | B
 
-define i32 @test55(i32 %p1, i32 %p2) {
-; CHECK-LABEL: @test55(
-; CHECK-NEXT:    [[A:%.*]] = udiv i32 42, [[P1:%.*]]
-; CHECK-NEXT:    [[B:%.*]] = udiv i32 42, [[P2:%.*]]
-; CHECK-NEXT:    [[O:%.*]] = xor i32 [[A]], -1
-; CHECK-NEXT:    [[R:%.*]] = and i32 [[B]], [[O]]
+define i32 @xor_andn_commute3(i32 %pa, i32 %b) {
+; CHECK-LABEL: @xor_andn_commute3(
+; CHECK-NEXT:    [[A:%.*]] = udiv i32 42, [[PA:%.*]]
+; CHECK-NEXT:    [[NOTA:%.*]] = xor i32 [[A]], -1
+; CHECK-NEXT:    [[R:%.*]] = and i32 [[NOTA]], [[B:%.*]]
 ; CHECK-NEXT:    [[Z:%.*]] = xor i32 [[A]], [[R]]
 ; CHECK-NEXT:    ret i32 [[Z]]
 ;
-  %a = udiv i32 42, %p1
-  %b = udiv i32 42, %p2
-  %o = xor i32 %a, -1
-  %r = and i32 %o, %b
+  %a = udiv i32 42, %pa ; thwart complexity-based canonicalization
+  %nota = xor i32 %a, -1
+  %r = and i32 %nota, %b
+  %z = xor i32 %a, %r
+  ret i32 %z
+}
+
+; A ^ (B & ~A) --> A | B
+
+define i32 @xor_andn_commute4(i32 %pa, i32 %pb) {
+; CHECK-LABEL: @xor_andn_commute4(
+; CHECK-NEXT:    [[A:%.*]] = udiv i32 42, [[PA:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = udiv i32 42, [[PB:%.*]]
+; CHECK-NEXT:    [[NOTA:%.*]] = xor i32 [[A]], -1
+; CHECK-NEXT:    [[R:%.*]] = and i32 [[B]], [[NOTA]]
+; CHECK-NEXT:    [[Z:%.*]] = xor i32 [[A]], [[R]]
+; CHECK-NEXT:    ret i32 [[Z]]
+;
+  %a = udiv i32 42, %pa ; thwart complexity-based canonicalization
+  %b = udiv i32 42, %pb ; thwart complexity-based canonicalization
+  %nota = xor i32 %a, -1
+  %r = and i32 %b, %nota
   %z = xor i32 %a, %r
   ret i32 %z
 }