[InstCombine] Add pre-commit tests for PR65968. NFC.

Author: dtcxzyw

llvm/test/Transforms/InstCombine/icmp-equality-xor.ll

@@ -0,0 +1,135 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+declare void @use(i32)
+define i1 @cmpeq_xor_cst1(i32 %a, i32 %b) {
+; CHECK-LABEL: @cmpeq_xor_cst1(
+; CHECK-NEXT:    [[C:%.*]] = xor i32 [[A:%.*]], 10
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[C]], [[B:%.*]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %c = xor i32 %a, 10
+  %cmp = icmp eq i32 %c, %b
+  ret i1 %cmp
+}
+
+define i1 @cmpeq_xor_cst2(i32 %a, i32 %b) {
+; CHECK-LABEL: @cmpeq_xor_cst2(
+; CHECK-NEXT:    [[C:%.*]] = xor i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[C]], 10
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %c = xor i32 %a, %b
+  %cmp = icmp eq i32 %c, 10
+  ret i1 %cmp
+}
+
+define i1 @cmpeq_xor_cst3(i32 %a, i32 %b) {
+; CHECK-LABEL: @cmpeq_xor_cst3(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %c = xor i32 %a, 10
+  %d = xor i32 %b, 10
+  %cmp = icmp eq i32 %c, %d
+  ret i1 %cmp
+}
+
+define i1 @cmpne_xor_cst1(i32 %a, i32 %b) {
+; CHECK-LABEL: @cmpne_xor_cst1(
+; CHECK-NEXT:    [[C:%.*]] = xor i32 [[A:%.*]], 10
+; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i32 [[C]], [[B:%.*]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %c = xor i32 %a, 10
+  %cmp = icmp ne i32 %c, %b
+  ret i1 %cmp
+}
+
+define i1 @cmpne_xor_cst2(i32 %a, i32 %b) {
+; CHECK-LABEL: @cmpne_xor_cst2(
+; CHECK-NEXT:    [[C:%.*]] = xor i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i32 [[C]], 10
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %c = xor i32 %a, %b
+  %cmp = icmp ne i32 %c, 10
+  ret i1 %cmp
+}
+
+define i1 @cmpne_xor_cst3(i32 %a, i32 %b) {
+; CHECK-LABEL: @cmpne_xor_cst3(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %c = xor i32 %a, 10
+  %d = xor i32 %b, 10
+  %cmp = icmp ne i32 %c, %d
+  ret i1 %cmp
+}
+
+define i1 @cmpeq_xor_cst1_multiuse(i32 %a, i32 %b) {
+; CHECK-LABEL: @cmpeq_xor_cst1_multiuse(
+; CHECK-NEXT:    [[C:%.*]] = xor i32 [[A:%.*]], 10
+; CHECK-NEXT:    call void @use(i32 [[C]])
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[C]], [[B:%.*]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %c = xor i32 %a, 10
+  call void @use(i32 %c)
+  %cmp = icmp eq i32 %c, %b
+  ret i1 %cmp
+}
+
+define i1 @cmpeq_xor_cst1_commuted(i32 %a, i32 %b) {
+; CHECK-LABEL: @cmpeq_xor_cst1_commuted(
+; CHECK-NEXT:    [[C:%.*]] = xor i32 [[A:%.*]], 10
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[C]], [[B:%.*]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %c = xor i32 %a, 10
+  %cmp = icmp eq i32 %b, %c
+  ret i1 %cmp
+}
+
+define <2 x i1> @cmpeq_xor_cst1_vec(<2 x i32> %a, <2 x i32> %b) {
+; CHECK-LABEL: @cmpeq_xor_cst1_vec(
+; CHECK-NEXT:    [[C:%.*]] = xor <2 x i32> [[A:%.*]], <i32 10, i32 11>
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq <2 x i32> [[C]], [[B:%.*]]
+; CHECK-NEXT:    ret <2 x i1> [[CMP]]
+;
+  %c = xor <2 x i32> %a, <i32 10, i32 11>
+  %cmp = icmp eq <2 x i32> %b, %c
+  ret <2 x i1> %cmp
+}
+
+; tests from PR65968
+define i1 @foo1(i32 %x, i32 %y) {
+; CHECK-LABEL: @foo1(
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[X:%.*]], -2147483648
+; CHECK-NEXT:    [[NEG:%.*]] = and i32 [[Y:%.*]], -2147483648
+; CHECK-NEXT:    [[AND1:%.*]] = xor i32 [[NEG]], -2147483648
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[AND]], [[AND1]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %and = and i32 %x, -2147483648
+  %neg = xor i32 %y, -1
+  %and1 = and i32 %neg, -2147483648
+  %cmp = icmp eq i32 %and, %and1
+  ret i1 %cmp
+}
+
+define i1 @foo2(i32 %x, i32 %y) {
+; CHECK-LABEL: @foo2(
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[X:%.*]], -2147483648
+; CHECK-NEXT:    [[NEG:%.*]] = and i32 [[Y:%.*]], -2147483648
+; CHECK-NEXT:    [[AND1:%.*]] = xor i32 [[NEG]], -2147483648
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[AND]], [[AND1]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %and = and i32 %x, -2147483648
+  %neg = and i32 %y, -2147483648
+  %and1 = xor i32 %neg, -2147483648
+  %cmp = icmp eq i32 %and, %and1
+  ret i1 %cmp
+}