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[AMDGPU] Fix bug with tracking processed blocks in SIInsertWaitcnts

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BlockWaitcntProcessedSet was not being cleared between calls, so it was
producing incorrect counts in cases where MBB addresses happened to coincide
across multiple calls.

Differential Revision: https://reviews.llvm.org/D48391

llvm-svn: 335268
This commit is contained in:
Scott Linder 2018-06-21 18:48:48 +00:00
parent 1ba54fc164
commit a83da62375
1 changed files with 1 additions and 0 deletions
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lib/Target/AMDGPU/SIInsertWaitcnts.cpp
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@ -1868,6 +1868,7 @@ bool SIInsertWaitcnts::runOnMachineFunction(MachineFunction &MF) {
BlockVisitedSet.clear();
VCCZBugHandledSet.clear();
LoopWaitcntDataMap.clear();
BlockWaitcntProcessedSet.clear();
// Walk over the blocks in reverse post-dominator order, inserting
// s_waitcnt where needed.