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memory barrier instructions by definition have side effects. This prevents the post-RA scheduler from moving them around.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91150 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2009-12-11 20:29:53 +00:00
parent 192db0027c
commit c8f9e4fdc5
1 changed files with 1 additions and 1 deletions
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lib/Target/ARM/ARMInstrInfo.td
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@ -1574,7 +1574,7 @@ def MOVCCi : AI1<0b1101, (outs GPR:$dst),
//
// memory barriers protect the atomic sequences
let isPredicable = 0 in {
let isPredicable = 0, hasSideEffects = 1 in {
def Int_MemBarrierV7 : AI<(outs), (ins),
Pseudo, NoItinerary,
"dmb", "",