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MachineVerifier should count landing pad successors as basic blocks rather than

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out-edges. Fixes PR8824.

llvm-svn: 122228
This commit is contained in:
Cameron Zwarich 2010-12-20 04:19:48 +00:00
parent 6970ec515e
commit ad29bd5325
1 changed files with 9 additions and 7 deletions
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16
lib/CodeGen/MachineVerifier.cpp
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@ -380,11 +380,13 @@ MachineVerifier::visitMachineBasicBlockBefore(const MachineBasicBlock *MBB) {
const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();
// Count the number of landing pad successors.
unsigned LandingPadSuccs = 0;
SmallPtrSet<MachineBasicBlock*, 4> LandingPadSuccs;
for (MachineBasicBlock::const_succ_iterator I = MBB->succ_begin(),
E = MBB->succ_end(); I != E; ++I)
LandingPadSuccs += (*I)->isLandingPad();
if (LandingPadSuccs > 1)
E = MBB->succ_end(); I != E; ++I) {
if ((*I)->isLandingPad())
LandingPadSuccs.insert(*I);
}
if (LandingPadSuccs.size() > 1)
report("MBB has more than one landing pad successor", MBB);
// Call AnalyzeBranch. If it succeeds, there several more conditions to check.
@ -402,11 +404,11 @@ MachineVerifier::visitMachineBasicBlockBefore(const MachineBasicBlock *MBB) {
// It's possible that the block legitimately ends with a noreturn
// call or an unreachable, in which case it won't actually fall
// out the bottom of the function.
} else if (MBB->succ_size() == LandingPadSuccs) {
} else if (MBB->succ_size() == LandingPadSuccs.size()) {
// It's possible that the block legitimately ends with a noreturn
// call or an unreachable, in which case it won't actuall fall
// out of the block.
} else if (MBB->succ_size() != 1+LandingPadSuccs) {
} else if (MBB->succ_size() != 1+LandingPadSuccs.size()) {
report("MBB exits via unconditional fall-through but doesn't have "
"exactly one CFG successor!", MBB);
} else if (!MBB->isSuccessor(MBBI)) {
@ -424,7 +426,7 @@ MachineVerifier::visitMachineBasicBlockBefore(const MachineBasicBlock *MBB) {
}
} else if (TBB && !FBB && Cond.empty()) {
// Block unconditionally branches somewhere.
if (MBB->succ_size() != 1+LandingPadSuccs) {
if (MBB->succ_size() != 1+LandingPadSuccs.size()) {
report("MBB exits via unconditional branch but doesn't have "
"exactly one CFG successor!", MBB);
} else if (!MBB->isSuccessor(TBB)) {