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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-02-09 00:25:36 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-02-09 00:25:36 +0000 |
| commit | c3dca3f9d4a049102fa985aedbc65e53f4cf6c0d (patch) | |
| tree | 2f83006f939c37553916f267cc8a5199a20ea5e0 | |
| parent | 8a2bbdeee24b40da6187199658646d04329c139e (diff) | |
Set an allocation hint when rematting before a COPY.
This almost guarantees that the COPY will be coalesced.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125140 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/InlineSpiller.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp index 00ca3d5bb6..a1bd972d38 100644 --- a/lib/CodeGen/InlineSpiller.cpp +++ b/lib/CodeGen/InlineSpiller.cpp @@ -154,6 +154,10 @@ bool InlineSpiller::reMaterializeFor(MachineBasicBlock::iterator MI) { LiveInterval &NewLI = edit_->create(mri_, lis_, vrm_); NewLI.markNotSpillable(); + // Rematting for a copy: Set allocation hint to be the destination register. + if (MI->isCopy()) + mri_.setRegAllocationHint(NewLI.reg, 0, MI->getOperand(0).getReg()); + // Finally we can rematerialize OrigMI before MI. SlotIndex DefIdx = edit_->rematerializeAt(*MI->getParent(), MI, NewLI.reg, RM, lis_, tii_, tri_); |