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Fix RegScavenger::forward() to work on basic blocks containing exactly

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one instruction.

llvm-svn: 61236
This commit is contained in:
Dan Gohman 2008-12-19 00:45:13 +00:00
parent 40ff87ab97
commit 1e66a47f73
1 changed files with 1 additions and 0 deletions
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include/llvm/CodeGen/RegisterScavenging.h
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@ -98,6 +98,7 @@ public:
/// forward / backward - Move the internal MBB iterator and update register /// forward / backward - Move the internal MBB iterator and update register
/// states until it has processed the specific iterator. /// states until it has processed the specific iterator.
void forward(MachineBasicBlock::iterator I) { void forward(MachineBasicBlock::iterator I) {
if (!Tracking && MBB->begin() != I) forward();
while (MBBI != I) forward(); while (MBBI != I) forward();
} }
void backward(MachineBasicBlock::iterator I) { void backward(MachineBasicBlock::iterator I) {