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R600: Remove successive JUMP in AnalyzeBranch when AllowModify is true

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This fixes a crash in the OpenCV OpenCL test suite.

There is no lit test for this, because the test would be very large
and could easily be invalidated by changes to the scheduler
or other parts of the compiler.

Patch by:  Vincent Lejeune

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199919 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2014-01-23 18:49:34 +00:00
parent 35f321dde5
commit 63875e620f
1 changed files with 7 additions and 1 deletions
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8
lib/Target/R600/R600InstrInfo.cpp
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@ -716,7 +716,13 @@ R600InstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,
return false;
}
// Get the last instruction in the block.
// Remove successive JUMP
while (I != MBB.begin() && llvm::prior(I)->getOpcode() == AMDGPU::JUMP) {
MachineBasicBlock::iterator PriorI = llvm::prior(I);
if (AllowModify)
I->removeFromParent();
I = PriorI;
}
MachineInstr *LastInst = I;
// If there is only one terminator instruction, process it.