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| author | Yaxun Liu <Yaxun.Liu@amd.com> | 2017-02-24 20:27:25 +0000 |
|---|---|---|
| committer | Yaxun Liu <Yaxun.Liu@amd.com> | 2017-02-24 20:27:25 +0000 |
| commit | e6d1ce59c0d320e02fe50ddb85e37c82f0a453cf (patch) | |
| tree | b55d0c21ab522c07f19526520842f6f5cc3a62dd /llvm/test | |
| parent | 9cc84384addbec14650adf532fb0b47de57a53d7 (diff) | |
| download | bcm5719-llvm-e6d1ce59c0d320e02fe50ddb85e37c82f0a453cf.tar.gz bcm5719-llvm-e6d1ce59c0d320e02fe50ddb85e37c82f0a453cf.zip | |
[InstCombine] Fix bug in pointer replacement
This optimisation was crashing when there was a chain of more than one bitcast
instruction to replace, as a result of the changes in D27283.
Patch by James Price.
Differential Revision: https://reviews.llvm.org/D30347
llvm-svn: 296163
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/memcpy-addrspace.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/memcpy-addrspace.ll b/llvm/test/Transforms/InstCombine/memcpy-addrspace.ll index 2b80f2f51e5..17bc1d08f98 100644 --- a/llvm/test/Transforms/InstCombine/memcpy-addrspace.ll +++ b/llvm/test/Transforms/InstCombine/memcpy-addrspace.ll @@ -21,6 +21,26 @@ entry: ret void } +; CHECK-LABEL: test_load_bitcast_chain +; CHECK: %[[GEP:.*]] = getelementptr [8 x i32], [8 x i32] addrspace(2)* @test.data, i64 0, i64 %x +; CHECK: %{{.*}} = load i32, i32 addrspace(2)* %[[GEP]] +; CHECK-NOT: alloca +; CHECK-NOT: call void @llvm.memcpy.p0i8.p2i8.i64 +; CHECK-NOT: addrspacecast +; CHECK-NOT: load i32, i32* +define void @test_load_bitcast_chain(i32 addrspace(1)* %out, i64 %x) { +entry: + %data = alloca [8 x i32], align 4 + %0 = bitcast [8 x i32]* %data to i8* + call void @llvm.memcpy.p0i8.p2i8.i64(i8* %0, i8 addrspace(2)* bitcast ([8 x i32] addrspace(2)* @test.data to i8 addrspace(2)*), i64 32, i32 4, i1 false) + %1 = bitcast i8* %0 to i32* + %arrayidx = getelementptr inbounds i32, i32* %1, i64 %x + %2 = load i32, i32* %arrayidx, align 4 + %arrayidx1 = getelementptr inbounds i32, i32 addrspace(1)* %out, i64 %x + store i32 %2, i32 addrspace(1)* %arrayidx1, align 4 + ret void +} + ; CHECK-LABEL: test_call ; CHECK: alloca ; CHECK: call void @llvm.memcpy.p0i8.p2i8.i64 |
