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Add a RequireStructuredCFG Field to TargetMachine.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196634 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vincent Lejeune
2013-12-07 01:49:19 +00:00
parent 7c8fbdac72
commit d254d3111e
8 changed files with 27 additions and 3 deletions
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5
lib/CodeGen/MachineBasicBlock.cpp
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@ -677,6 +677,11 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) {
MachineFunction *MF = getParent();
DebugLoc dl; // FIXME: this is nowhere
// Performance might be harmed on HW that implements branching using exec mask
// where both sides of the branches are always executed.
if (MF->getTarget().requiresStructuredCFG())
return NULL;
// We may need to update this's terminator, but we can't do that if
// AnalyzeBranch fails. If this uses a jump table, we won't touch it.
const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();