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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-11-30 22:55:54 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-11-30 22:55:54 +0000 |
| commit | ce7a663140e6e67cf5ef7091e076e8541300c15a (patch) | |
| tree | 1cd89c92d53bdb96df8824ce5c153900845c7334 /docs/SourceLevelDebugging.html | |
| parent | b25846e1807ab8cb4cc3594458283947fb9e9e39 (diff) | |
New virtual registers created for spill intervals should inherit allocation hints from the original register.
This helps us avoid silly copies when rematting values that are copied to a physical register:
leaq _.str44(%rip), %rcx
movq %rcx, %rsi
call _strcmp
becomes:
leaq _.str44(%rip), %rsi
call _strcmp
The coalescer will not touch the movq because that would tie down the physical register.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90163 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/SourceLevelDebugging.html')
0 files changed, 0 insertions, 0 deletions