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add cmd line option to leave dbgvalues in during post-RA sceduling. Useful
while debugging what's mishandled about them in the post-RA pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103805 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -80,6 +80,12 @@ DebugMod("postra-sched-debugmod",
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cl::desc("Debug control MBBs that are scheduled"),
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cl::desc("Debug control MBBs that are scheduled"),
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cl::init(0), cl::Hidden);
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cl::init(0), cl::Hidden);
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static cl::opt<bool>
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EnablePostRADbgValue("post-RA-dbg-value",
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cl::desc("Enable processing of dbg_value in post-RA"),
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cl::init(false), cl::Hidden);
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AntiDepBreaker::~AntiDepBreaker() { }
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AntiDepBreaker::~AntiDepBreaker() { }
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namespace {
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namespace {
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@ -269,11 +275,14 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
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// scheduler has some sort of problem with DebugValue instructions that
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// scheduler has some sort of problem with DebugValue instructions that
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// causes an assertion in LeaksContext.h to fail occasionally. Just
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// causes an assertion in LeaksContext.h to fail occasionally. Just
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// remove all those instructions for now.
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// remove all those instructions for now.
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for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
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if (!EnablePostRADbgValue) {
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I != E; ) {
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DEBUG(dbgs() << "*** Maintaining DbgValues in PostRAScheduler\n");
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MachineInstr *MI = &*I++;
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for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
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if (MI->isDebugValue())
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I != E; ) {
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MI->eraseFromParent();
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MachineInstr *MI = &*I++;
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if (MI->isDebugValue())
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MI->eraseFromParent();
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}
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}
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}
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// Schedule each sequence of instructions not interrupted by a label
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// Schedule each sequence of instructions not interrupted by a label
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