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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-07-29 00:52:19 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-07-29 00:52:19 +0000 |
| commit | 4bd94f7bbe2ed6e0d83d03b06c0d20bb346abeca (patch) | |
| tree | 2e7b1d2d3e39392c15dc534820086f4b2d3a724d /tools/llvm-diff/DifferenceEngine.cpp | |
| parent | 887b703d226fe913bf4b5c23935ba5b784eb993c (diff) | |
Fix a bug in the -regalloc=fast handling of exotic two-address instruction with
multiple defs, like t2LDRSB_POST.
The first def could accidentally steal the physreg that the second, tied def was
required to be allocated to.
Now, the tied use-def is treated more like an early clobber, and the physreg is
reserved before allocating the other defs.
This would never be a problem when the tied def was the only def which is the
usual case.
This fixes MallocBench/gs for thumb2 -O0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109715 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llvm-diff/DifferenceEngine.cpp')
0 files changed, 0 insertions, 0 deletions