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| author | Evan Cheng <evan.cheng@apple.com> | 2010-04-15 18:42:28 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-04-15 18:42:28 +0000 |
| commit | 0ea7d219ec5bb45a0b3e96c01070cfc21227291d (patch) | |
| tree | 9068c4cc40d336454060ac5133c002428b9ac971 /lib | |
| parent | c8866980fe551352a7f9180248f1faa198ddae4e (diff) | |
| download | llvm-0ea7d219ec5bb45a0b3e96c01070cfc21227291d.tar.gz llvm-0ea7d219ec5bb45a0b3e96c01070cfc21227291d.tar.bz2 llvm-0ea7d219ec5bb45a0b3e96c01070cfc21227291d.tar.xz | |
ARM SelectDYN_ALLOC should emit a copy from SP rather than referencing SP directly. In cases where there are two dyn_alloc in the same BB it would have caused the old SP value to be reused and badness ensues. rdar://7493908
llvm is generating poor code for dynamic alloca, I'll fix that later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101383 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/ARM/ARMISelDAGToDAG.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp index 7d48663189..2f24d2ea1c 100644 --- a/lib/Target/ARM/ARMISelDAGToDAG.cpp +++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp @@ -945,7 +945,7 @@ SDNode *ARMDAGToDAGISel::SelectDYN_ALLOC(SDNode *N) { SDValue Chain = N->getOperand(0); SDValue Size = N->getOperand(1); SDValue Align = N->getOperand(2); - SDValue SP = CurDAG->getRegister(ARM::SP, MVT::i32); + SDValue SP = CurDAG->getCopyFromReg(Chain, dl, ARM::SP, MVT::i32); int32_t AlignVal = cast<ConstantSDNode>(Align)->getSExtValue(); if (AlignVal < 0) // We need to align the stack. Use Thumb1 tAND which is the only thumb |