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| author | Akira Hatanaka <ahatanaka@mips.com> | 2013-02-14 23:54:40 +0000 |
|---|---|---|
| committer | Akira Hatanaka <ahatanaka@mips.com> | 2013-02-14 23:54:40 +0000 |
| commit | d977aacf990d241d0224d20518f631a928c1b1a8 (patch) | |
| tree | ec22472a63c0903fda349446feecfd87873e28f6 /lib | |
| parent | cd7319dc5f91ac81ab9d8505f34937e91bfcf65d (diff) | |
| download | external_llvm-d977aacf990d241d0224d20518f631a928c1b1a8.zip external_llvm-d977aacf990d241d0224d20518f631a928c1b1a8.tar.gz external_llvm-d977aacf990d241d0224d20518f631a928c1b1a8.tar.bz2 | |
[mips] Disallow moving load/store instructions past volatile instructions.
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
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/Mips/MipsDelaySlotFiller.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Target/Mips/MipsDelaySlotFiller.cpp b/lib/Target/Mips/MipsDelaySlotFiller.cpp index b56d9cd..6b25d2d 100644 --- a/lib/Target/Mips/MipsDelaySlotFiller.cpp +++ b/lib/Target/Mips/MipsDelaySlotFiller.cpp @@ -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()) { |