Don't return registers from register classes that aren't legal.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26317 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index e82e7f7..c875a85 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -766,11 +766,24 @@
for (MRegisterInfo::regclass_iterator RCI = RI->regclass_begin(),
E = RI->regclass_end(); RCI != E; ++RCI) {
const TargetRegisterClass *RC = *RCI;
+
+ // If none of the the value types for this register class are valid, we
+ // can't use it. For example, 64-bit reg classes on 32-bit targets.
+ bool isLegal = false;
+ for (TargetRegisterClass::vt_iterator I = RC->vt_begin(), E = RC->vt_end();
+ I != E; ++I) {
+ if (isTypeLegal(*I)) {
+ isLegal = true;
+ break;
+ }
+ }
+
+ if (!isLegal) continue;
+
for (TargetRegisterClass::iterator I = RC->begin(), E = RC->end();
I != E; ++I) {
- if (StringsEqualNoCase(RegName, RI->get(*I).Name)) {
+ if (StringsEqualNoCase(RegName, RI->get(*I).Name))
return std::make_pair(*I, RC);
- }
}
}