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Be more aggressive about renumbering vregs after splitting them.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62639 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2009-01-21 00:13:28 +00:00
parent 476615934a
commit 6cf7c390ec
2 changed files with 8 additions and 4 deletions
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8
lib/CodeGen/PreAllocSplitting.cpp
View File

@ -1127,9 +1127,11 @@ bool PreAllocSplitting::Rematerialize(unsigned vreg, VNInfo* ValNo,
LIs->InsertMachineInstrInMaps(prior(RestorePt), RestoreIdx);
if (KillPt->getParent() == BarrierMBB) {
UpdateRegisterInterval(ValNo, LIs->getUseIndex(KillIdx)+1,
VNInfo* After = UpdateRegisterInterval(ValNo, LIs->getUseIndex(KillIdx)+1,
LIs->getDefIndex(RestoreIdx));
RenumberValno(After);
++NumSplits;
++NumRemats;
return true;
@ -1312,8 +1314,10 @@ bool PreAllocSplitting::SplitRegLiveInterval(LiveInterval *LI) {
UpdateSpillSlotInterval(ValNo, LIs->getUseIndex(SpillIndex)+1,
LIs->getDefIndex(RestoreIndex));
UpdateRegisterInterval(ValNo, LIs->getUseIndex(SpillIndex)+1,
VNInfo* After = UpdateRegisterInterval(ValNo,
LIs->getUseIndex(SpillIndex)+1,
LIs->getDefIndex(RestoreIndex));
RenumberValno(After);
++NumSplits;
return true;

2
test/CodeGen/X86/pre-split2.ll
View File

@ -1,5 +1,5 @@
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -pre-alloc-split -stats |& \
; RUN: grep {pre-alloc-split} | count 2
; RUN: grep {pre-alloc-split} | count 3
define i32 @t() {
entry: