xref: /aosp_15_r20/external/llvm/test/Transforms/GVN/2009-11-12-MemDepMallocBitCast.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58) 
1*9880d681SAndroid Build Coastguard Worker; Test to make sure malloc's bitcast does not block detection of a store
2*9880d681SAndroid Build Coastguard Worker; to aliased memory; GVN should not optimize away the load in this program.
3*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -gvn -S | FileCheck %s
4*9880d681SAndroid Build Coastguard Worker
5*9880d681SAndroid Build Coastguard Workerdefine i64 @test() {
6*9880d681SAndroid Build Coastguard Worker  %1 = tail call i8* @malloc(i64 mul (i64 4, i64 ptrtoint (i64* getelementptr (i64, i64* null, i64 1) to i64))) ; <i8*> [#uses=2]
7*9880d681SAndroid Build Coastguard Worker  store i8 42, i8* %1
8*9880d681SAndroid Build Coastguard Worker  %X = bitcast i8* %1 to i64*                     ; <i64*> [#uses=1]
9*9880d681SAndroid Build Coastguard Worker  %Y = load i64, i64* %X                               ; <i64> [#uses=1]
10*9880d681SAndroid Build Coastguard Worker  ret i64 %Y
11*9880d681SAndroid Build Coastguard Worker; CHECK: %Y = load i64, i64* %X
12*9880d681SAndroid Build Coastguard Worker; CHECK: ret i64 %Y
13*9880d681SAndroid Build Coastguard Worker}
14*9880d681SAndroid Build Coastguard Worker
15*9880d681SAndroid Build Coastguard Workerdeclare noalias i8* @malloc(i64)
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