Use GR32 for copies between GR32_NOSP and GR32_NOREX, as neither
is a subset of the other, but both are subsets of GR32.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78250 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 784a790..393bd5c 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -1697,10 +1697,18 @@
CommonRC = SrcRC;
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 == &X86::GR64RegClass || SrcRC->hasSuperClass(&X86::GR64RegClass)) &&
- (DestRC == &X86::GR64RegClass || DestRC->hasSuperClass(&X86::GR64RegClass)))
+ // but we want to copy then as GR64. Similarly, for GR32_NOREX and
+ // GR32_NOSP, copy as GR32.
+ if ((SrcRC == &X86::GR64RegClass ||
+ SrcRC->hasSuperClass(&X86::GR64RegClass)) &&
+ (DestRC == &X86::GR64RegClass ||
+ DestRC->hasSuperClass(&X86::GR64RegClass)))
CommonRC = &X86::GR64RegClass;
+ else if ((SrcRC == &X86::GR32RegClass ||
+ SrcRC->hasSuperClass(&X86::GR32RegClass)) &&
+ (DestRC == &X86::GR32RegClass ||
+ DestRC->hasSuperClass(&X86::GR32RegClass)))
+ CommonRC = &X86::GR32RegClass;
else
CommonRC = 0;
}