Get rid of a pseudo instruction and replace it with subreg based operation on real instructions, ridding the asm printers of the hack used to do this previously. In the process, update LowerSubregs to be careful about eliminating copies that have side affects.
Note: the coalescer will have to be careful about this too, when it starts coalescing insert_subreg nodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48329 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.h b/lib/Target/X86/X86InstrInfo.h
index e0d0342..f4cdb70 100644
--- a/lib/Target/X86/X86InstrInfo.h
+++ b/lib/Target/X86/X86InstrInfo.h
@@ -45,15 +45,7 @@
COND_S = 15,
COND_INVALID
};
-
- // X86 specific implict values used for subregister inserts.
- // This can be used to model the fact that x86-64 by default
- // inserts 32-bit values into 64-bit registers implicitly containing zeros.
- enum ImplicitVal {
- IMPL_VAL_UNDEF = 0,
- IMPL_VAL_ZERO = 1
- };
-
+
// Turn condition code into conditional branch opcode.
unsigned GetCondBranchFromCond(CondCode CC);