[PATCH] D92104: [RegisterScavenging] Fix assert in scavengeRegisterBackwards
Simon Cook via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Dec 18 08:57:41 PST 2020
This revision was automatically updated to reflect the committed changes.
Closed by commit rG698ae90f3062: [RegisterScavenging] Fix assert in scavengeRegisterBackwards (authored by craigblackmore, committed by simoncook).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D92104/new/
https://reviews.llvm.org/D92104
Files:
llvm/lib/CodeGen/RegisterScavenging.cpp
Index: llvm/lib/CodeGen/RegisterScavenging.cpp
===================================================================
--- llvm/lib/CodeGen/RegisterScavenging.cpp
+++ llvm/lib/CodeGen/RegisterScavenging.cpp
@@ -573,9 +573,8 @@
RestoreAfter);
MCPhysReg Reg = P.first;
MachineBasicBlock::iterator SpillBefore = P.second;
- assert(Reg != 0 && "No register left to scavenge!");
// Found an available register?
- if (SpillBefore == MBB.end()) {
+ if (Reg != 0 && SpillBefore == MBB.end()) {
LLVM_DEBUG(dbgs() << "Scavenged free register: " << printReg(Reg, TRI)
<< '\n');
return Reg;
@@ -584,6 +583,8 @@
if (!AllowSpill)
return 0;
+ assert(Reg != 0 && "No register left to scavenge!");
+
MachineBasicBlock::iterator ReloadAfter =
RestoreAfter ? std::next(MBBI) : MBBI;
MachineBasicBlock::iterator ReloadBefore = std::next(ReloadAfter);
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