[PATCH] D159511: [InstCombine] Pre-commit test for D159510

[Qi Hu via Phabricator via llvm-commits]

Qi-Hu created this revision.
Qi-Hu added a reviewer: bryanpkc.
Herald added a project: All.
Qi-Hu requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D159511

Files:
  llvm/test/Transforms/InstCombine/fold-xor-and-select-i1.ll


Index: llvm/test/Transforms/InstCombine/fold-xor-and-select-i1.ll
===================================================================
--- /dev/null
+++ llvm/test/Transforms/InstCombine/fold-xor-and-select-i1.ll
@@ -0,0 +1,16 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+define i1 @max_if(i1 %a, i1 %b) {
+; CHECK-LABEL: define i1 @max_if
+; CHECK-SAME: (i1 [[A:%.*]], i1 [[B:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = xor i1 [[B]], true
+; CHECK-NEXT:    [[CMP:%.*]] = and i1 [[TMP1]], [[A]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[CMP]], i1 [[A]], i1 [[B]]
+; CHECK-NEXT:    ret i1 [[TMP2]]
+;
+  %1 = xor i1 %b, true
+  %cmp = and i1 %1, %a
+  %2 = select i1 %cmp, i1 %a, i1 %b
+  ret i1 %2
+}


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