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[mips] Disallow moving load/store instructions past volatile instructions.

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Unfortunately, I wasn't able to create a test case that demonstrates the
problem I was trying to fix with this patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175226 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2013-02-14 23:54:40 +00:00
parent cd7319dc5f
commit d977aacf99
1 changed files with 1 additions and 1 deletions
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2
lib/Target/Mips/MipsDelaySlotFiller.cpp
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@ -208,7 +208,7 @@ bool Filler::delayHasHazard(const MachineInstr &Candidate, bool &SawLoad,
// Loads or stores cannot be moved past a store to the delay slot
// and stores cannot be moved past a load.
if (Candidate.mayStore()) {
if (Candidate.mayStore() || Candidate.hasOrderedMemoryRef()) {
HasHazard |= SawStore | SawLoad;
SawStore = true;
} else if (Candidate.mayLoad()) {