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| author | Bill Wendling <isanbard@gmail.com> | 2010-06-25 20:42:55 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2010-06-25 20:42:55 +0000 |
| commit | 39d258aa49717218628c158504996482bbbb0a5a (patch) | |
| tree | e17d5184c1a4100800321cef871b3ad92d541ecd /lib/CodeGen | |
| parent | 39afa908dea0fc57291a2d08497f8d1877597c54 (diff) | |
| download | external_llvm-39d258aa49717218628c158504996482bbbb0a5a.zip external_llvm-39d258aa49717218628c158504996482bbbb0a5a.tar.gz external_llvm-39d258aa49717218628c158504996482bbbb0a5a.tar.bz2 | |
We should remove the live range from the destination register only if *all* defs
are dead, not just the def of this register. I.e., a register could be dead, but
it's subreg isn't.
Testcase to follow with a subsequent patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106878 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index 6209671..5a30ddf 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -1892,8 +1892,8 @@ bool SimpleRegisterCoalescing::runOnMachineFunction(MachineFunction &fn) { if (li_->hasInterval(SrcReg)) { LiveInterval &RegInt = li_->getInterval(SrcReg); // If def of this move instruction is dead, remove its live range - // from the dstination register's live interval. - if (MI->registerDefIsDead(DstReg)) { + // from the destination register's live interval. + if (MI->allDefsAreDead()) { if (!ShortenDeadCopySrcLiveRange(RegInt, MI)) ShortenDeadCopyLiveRange(RegInt, MI); } else { |