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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-02-08 18:50:21 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-02-08 18:50:21 +0000 |
| commit | 5c716bdccce2fa504e1aa0b67226165d181d2459 (patch) | |
| tree | a3521d6a1e177037b2e620c3585ed3f0a462cd0a /lib/Target/ARM/Disassembler/ARMDisassembler.cpp | |
| parent | 01cb34b0111a1e8792f327b56c51bc3bbaf83aca (diff) | |
Add SplitEditor::overlapIntv() to create small ranges where both registers are live.
If a live range is used by a terminator instruction, and that live range needs
to leave the block on the stack or in a different register, it can be necessary
to have both sides of the split live at the terminator instruction.
Example:
%vreg2 = COPY %vreg1
JMP %vreg1
Becomes after spilling %vreg2:
SPILL %vreg1
JMP %vreg1
The spill doesn't kill the register as is normally the case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125102 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/Disassembler/ARMDisassembler.cpp')
0 files changed, 0 insertions, 0 deletions