hasSuperClass tests for a strict superset relation, rather than
a superset relation. This code wants to test the regular superset
relation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78236 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 22f8b53..784a790 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -1698,8 +1698,8 @@
else if (!DestRC->hasSubClass(SrcRC)) {
// Neither of GR64_NOREX or GR64_NOSP is a superclass of the other,
// but we want to copy then as GR64.
- if (SrcRC->hasSuperClass(&X86::GR64RegClass) &&
- DestRC->hasSuperClass(&X86::GR64RegClass))
+ if ((SrcRC == &X86::GR64RegClass || SrcRC->hasSuperClass(&X86::GR64RegClass)) &&
+ (DestRC == &X86::GR64RegClass || DestRC->hasSuperClass(&X86::GR64RegClass)))
CommonRC = &X86::GR64RegClass;
else
CommonRC = 0;