Merge pull request #69 from AdrianCX/acruceru/segv-compile

[X86] Fix to X86LoadValueInjectionRetHardeningPass for possible segfault
rust-lang · Jul 11, 2020 · 86b120e · 86b120e
2 parents 6810e22 + a2c62c7
commit 86b120e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/llvm/lib/Target/X86/X86LoadValueInjectionRetHardening.cpp b/llvm/lib/Target/X86/X86LoadValueInjectionRetHardening.cpp
@@ -99,6 +99,9 @@ bool X86LoadValueInjectionRetHardeningPass::runOnMachineFunction(
 
   bool Modified = false;
   for (auto &MBB : MF) {
+    if (MBB.empty())
+      continue;
+
     MachineInstr &MI = MBB.back();
     if (MI.getOpcode() != X86::RETQ)
       continue;