[PATCH] D20400: AMDGPU: Also look for s_cbranch_vccz

Matt Arsenault via llvm-commits llvm-commits at lists.llvm.org
Wed May 18 16:15:55 PDT 2016

arsenm created this revision.
arsenm added reviewers: tstellarAMD, nhaehnle.
arsenm added a subscriber: llvm-commits.
Herald added subscribers: kzhuravl, arsenm.



Index: lib/Target/AMDGPU/SILowerControlFlow.cpp
--- lib/Target/AMDGPU/SILowerControlFlow.cpp
+++ lib/Target/AMDGPU/SILowerControlFlow.cpp
@@ -158,7 +158,8 @@
       // When a uniform loop is inside non-uniform control flow, the branch
       // leaving the loop might be an S_CBRANCH_VCCNZ, which is never taken
       // when EXEC = 0. We should skip the loop lest it becomes infinite.
-      if (I->getOpcode() == AMDGPU::S_CBRANCH_VCCNZ)
+      if (I->getOpcode() == AMDGPU::S_CBRANCH_VCCNZ ||
+          I->getOpcode() == AMDGPU::S_CBRANCH_VCCZ)
         return true;
       if (++NumInstr >= SkipThreshold)

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