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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 | 0b2f8d24b3c783061abae38d66f761924a18e686 (patch) | |
| tree | d83e80b2f7c461d28a8de7e238537995abe0471c | |
| parent | 123b89b67f4b49f5e125dd306f75e481be365586 (diff) | |
| download | bcm5719-llvm-0b2f8d24b3c783061abae38d66f761924a18e686.tar.gz bcm5719-llvm-0b2f8d24b3c783061abae38d66f761924a18e686.zip | |
Set an allocation hint when rematting before a COPY.
This almost guarantees that the COPY will be coalesced.
llvm-svn: 125140
| -rw-r--r-- | llvm/lib/CodeGen/InlineSpiller.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/InlineSpiller.cpp b/llvm/lib/CodeGen/InlineSpiller.cpp index 00ca3d5bb64..a1bd972d38e 100644 --- a/llvm/lib/CodeGen/InlineSpiller.cpp +++ b/llvm/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_); |
