[NFC] precommit test case.

Author: fengfeng09

llvm/test/Transforms/InstCombine/or-or-combine.ll

@@ -0,0 +1,48 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -passes=instcombine < %s | FileCheck %s
+
+; (X | C) | Y --> (X | Y) | C
+
+define i32 @test1(i32 %x, i32 %y) {
+; CHECK-LABEL: @test1(
+; CHECK-NEXT:    [[INNER:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[OUTER:%.*]] = or i32 [[INNER]], 5
+; CHECK-NEXT:    ret i32 [[OUTER]]
+;
+  %inner = or disjoint i32 %x, 5
+  %outer = or disjoint i32 %inner, %y
+  ret i32 %outer
+}
+
+define i32 @test2(i32 %x, i32 %y) {
+; CHECK-LABEL: @test2(
+; CHECK-NEXT:    [[INNER:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[OUTER:%.*]] = or i32 [[INNER]], 5
+; CHECK-NEXT:    ret i32 [[OUTER]]
+;
+  %inner = or i32 %x, 5
+  %outer = or disjoint i32 %inner, %y
+  ret i32 %outer
+}
+
+define i32 @test3(i32 %x, i32 %y) {
+; CHECK-LABEL: @test3(
+; CHECK-NEXT:    [[INNER:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[OUTER:%.*]] = or i32 [[INNER]], 5
+; CHECK-NEXT:    ret i32 [[OUTER]]
+;
+  %inner = or disjoint i32 %x, 5
+  %outer = or i32 %inner, %y
+  ret i32 %outer
+}
+
+define i32 @test4(i32 %x, i32 %y) {
+; CHECK-LABEL: @test4(
+; CHECK-NEXT:    [[INNER:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[OUTER:%.*]] = or i32 [[INNER]], 5
+; CHECK-NEXT:    ret i32 [[OUTER]]
+;
+  %inner = or i32 %x, 5
+  %outer = or i32 %inner, %y
+  ret i32 %outer
+}