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Re-apply 72756 with fixes. One of those was introduced by we changed MachineInstrBuilder::addReg() interface.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72826 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-06-04 01:15:28 +00:00
parent fcad172006
commit 1488326156
2 changed files with 8 additions and 2 deletions
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9
lib/Target/ARM/ARMLoadStoreOptimizer.cpp
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@ -530,7 +530,7 @@ static bool mergeBaseUpdateLoadStore(MachineBasicBlock &MBB,
if (isAM2)
// STR_PRE, STR_POST;
BuildMI(MBB, MBBI, dl, TII->get(NewOpc), Base)
.addReg(MO.getReg(), getKillRegState(BaseKill))
.addReg(MO.getReg(), getKillRegState(MO.isKill()))
.addReg(Base).addReg(0).addImm(Offset).addImm(Pred).addReg(PredReg);
else
// FSTMS, FSTMD
@ -709,6 +709,13 @@ bool ARMLoadStoreOpt::LoadStoreMultipleOpti(MachineBasicBlock &MBB) {
// RS may be pointing to an instruction that's deleted.
RS->skipTo(prior(MBBI));
} else if (NumMemOps == 1) {
// Try folding preceeding/trailing base inc/dec into the single
// load/store.
if (mergeBaseUpdateLoadStore(MBB, MemOps[0].MBBI, TII, Advance, MBBI)) {
++NumMerges;
RS->forward(prior(MBBI));
}
}
CurrBase = 0;

1
test/CodeGen/ARM/str_pre-2.ll
View File

@ -1,6 +1,5 @@
; RUN: llvm-as < %s | llc -mtriple=arm-linux-gnu | grep {str.*\\!}
; RUN: llvm-as < %s | llc -mtriple=arm-linux-gnu | grep {ldr.*\\\[.*\], #+4}
; XFAIL: *
@b = external global i64*