| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 |
| ; Test to make sure malloc's bitcast does not block detection of a store |
| ; to aliased memory; GVN should not optimize away the load in this program. |
| ; RUN: opt < %s -passes=newgvn -S | FileCheck %s |
| |
| define i64 @test() { |
| ; CHECK-LABEL: define i64 @test() { |
| ; CHECK-NEXT: [[MUL:%.*]] = mul i64 4, ptrtoint (ptr getelementptr (i64, ptr null, i64 1) to i64) |
| ; CHECK-NEXT: [[TMP1:%.*]] = tail call ptr @malloc(i64 [[MUL]]) |
| ; CHECK-NEXT: store i8 42, ptr [[TMP1]], align 1 |
| ; CHECK-NEXT: [[Y:%.*]] = load i64, ptr [[TMP1]], align 4 |
| ; CHECK-NEXT: ret i64 [[Y]] |
| ; |
| %mul = mul i64 4, ptrtoint (ptr getelementptr (i64, ptr null, i64 1) to i64) |
| %1 = tail call ptr @malloc(i64 %mul) |
| store i8 42, ptr %1 |
| %Y = load i64, ptr %1 ; <i64> [#uses=1] |
| ret i64 %Y |
| } |
| |
| declare noalias ptr @malloc(i64) |
