Add more verification of LiveIntervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117170 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineVerifier.cpp b/lib/CodeGen/MachineVerifier.cpp
index 41a1343..eb8375d 100644
--- a/lib/CodeGen/MachineVerifier.cpp
+++ b/lib/CodeGen/MachineVerifier.cpp
@@ -921,8 +921,37 @@
report("Live range at def has different valno", MF);
*OS << "Valno #" << VNI->id << " is defined at " << VNI->def
<< " where valno #" << DefVNI->id << " is live.\n";
+ continue;
}
+ const MachineBasicBlock *MBB = LiveInts->getMBBFromIndex(VNI->def);
+ if (!MBB) {
+ report("Invalid definition index", MF);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def << '\n';
+ continue;
+ }
+
+ if (VNI->isPHIDef()) {
+ if (VNI->def != LiveInts->getMBBStartIdx(MBB)) {
+ report("PHIDef value is not defined at MBB start", MF);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def
+ << ", not at the beginning of BB#" << MBB->getNumber() << '\n';
+ }
+ } else {
+ // Non-PHI def.
+ if (!VNI->def.isDef()) {
+ report("Non-PHI def must be at a DEF slot", MF);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def << '\n';
+ }
+ const MachineInstr *MI = LiveInts->getInstructionFromIndex(VNI->def);
+ if (!MI) {
+ report("No instruction at def index", MF);
+ *OS << "Valno #" << VNI->id << " is defined at " << VNI->def << '\n';
+ } else if (!MI->modifiesRegister(LI.reg, TRI)) {
+ report("Defining instruction does not modify register", MI);
+ *OS << "Valno #" << VNI->id << " in " << LI << '\n';
+ }
+ }
}
for (LiveInterval::const_iterator I = LI.begin(), E = LI.end(); I!=E; ++I) {