GlobalISel: account for differing exception selector sizes.

For some reason the exception selector register must be a pointer (that's
assumed by SDag); on the other hand, it gets moved into an IR-level type which
might be entirely different (i32 on AArch64). IRTranslator needs to be aware of
this.

llvm-svn: 293546

1 files changed, 10 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 3a2469dca49..21657827a93 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -801,8 +801,17 @@ bool IRTranslator::translateLandingPad(const User &U,
 
   if (unsigned Reg = TLI.getExceptionSelectorRegister(PersonalityFn)) {
     MBB.addLiveIn(Reg);
+
+    // N.b. the exception selector register always has pointer type and may not
+    // match the actual IR-level type in the landingpad so an extra cast is
+    // needed.
+    unsigned PtrVReg = MRI->createGenericVirtualRegister(Tys[0]);
+    MIRBuilder.buildCopy(PtrVReg, Reg);
+
     unsigned VReg = MRI->createGenericVirtualRegister(Tys[1]);
-    MIRBuilder.buildCopy(VReg, Reg);
+    MIRBuilder.buildInstr(TargetOpcode::G_PTRTOINT)
+        .addDef(VReg)
+        .addUse(PtrVReg);
     Regs.push_back(VReg);
     Offsets.push_back(Tys[0].getSizeInBits());
   }