diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2010-04-08 20:02:37 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-04-08 20:02:37 +0000 |
| commit | a57fabe815ccf016eead526eb3ef475f116ab155 (patch) | |
| tree | c5766e5dbbe4131e812a643263b6355ff962132e /test/CodeGen | |
| parent | b8db3c2c507cc115ed773209eae6cb8b89db1586 (diff) | |
| download | external_llvm-a57fabe815ccf016eead526eb3ef475f116ab155.zip external_llvm-a57fabe815ccf016eead526eb3ef475f116ab155.tar.gz external_llvm-a57fabe815ccf016eead526eb3ef475f116ab155.tar.bz2 | |
Coalescer should not delete copy instructions whose defs are partially dead. e.g.
%RDI<def,dead> = MOV64rr %RAX<kill>, %EDI<imp-def>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100804 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/2010-04-08-CoalescerBug.ll | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2010-04-08-CoalescerBug.ll b/test/CodeGen/X86/2010-04-08-CoalescerBug.ll new file mode 100644 index 0000000..1c7c28c --- /dev/null +++ b/test/CodeGen/X86/2010-04-08-CoalescerBug.ll @@ -0,0 +1,26 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s +; rdar://7842028 + +; Do not delete partially dead copy instructions. +; %RDI<def,dead> = MOV64rr %RAX<kill>, %EDI<imp-def> +; REP_MOVSD %ECX<imp-def,dead>, %EDI<imp-def,dead>, %ESI<imp-def,dead>, %ECX<imp-use,kill>, %EDI<imp-use,kill>, %ESI<imp-use,kill> + + +%struct.F = type { %struct.FC*, i32, i32, i8, i32, i32, i32 } +%struct.FC = type { [10 x i8], [32 x i32], %struct.FC*, i32 } + +define void @t(%struct.F* %this) nounwind { +entry: +; CHECK: t: +; CHECK: addq $12, %rsi + %BitValueArray = alloca [32 x i32], align 4 + %tmp2 = getelementptr inbounds %struct.F* %this, i64 0, i32 0 + %tmp3 = load %struct.FC** %tmp2, align 8 + %tmp4 = getelementptr inbounds %struct.FC* %tmp3, i64 0, i32 1, i64 0 + %tmp5 = bitcast [32 x i32]* %BitValueArray to i8* + %tmp6 = bitcast i32* %tmp4 to i8* + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp5, i8* %tmp6, i64 128, i32 4, i1 false) + unreachable +} + +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind |