[X86] Make MOV32ri64 a post-RA pseudo instead of a CodeGenOnly instruction. It was only needed for rematerialization.

llvm-svn: 256818

3 files changed, 7 insertions, 9 deletions

diff --git a/llvm/lib/Target/X86/X86InstrCompiler.td b/llvm/lib/Target/X86/X86InstrCompiler.td
index ef3df0bb9a3..96a29ca8c37 100644
--- a/llvm/lib/Target/X86/X86InstrCompiler.td
+++ b/llvm/lib/Target/X86/X86InstrCompiler.td
@@ -281,10 +281,9 @@ let Predicates = [OptForSize, NotSlowIncDec, Not64BitMode],
 // Materialize i64 constant where top 32-bits are zero. This could theoretically
 // use MOV32ri with a SUBREG_TO_REG to represent the zero-extension, however
 // that would make it more difficult to rematerialize.
-let AddedComplexity = 1, isReMaterializable = 1, isAsCheapAsAMove = 1,
-    isCodeGenOnly = 1, hasSideEffects = 0 in
-def MOV32ri64 : Ii32<0xb8, AddRegFrm, (outs GR32:$dst), (ins i64i32imm:$src),
-                     "", [], IIC_ALU_NONMEM>, Sched<[WriteALU]>;
+let isReMaterializable = 1, isAsCheapAsAMove = 1,
+    isPseudo = 1, hasSideEffects = 0 in
+def MOV32ri64 : I<0, Pseudo, (outs GR32:$dst), (ins i64i32imm:$src), "", []>;
 
 // This 64-bit pseudo-move can be used for both a 64-bit constant that is
 // actually the zero-extension of a 32-bit constant and for labels in the
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index 6799a5e01c2..246804e3428 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -5369,7 +5369,10 @@ bool X86InstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
   case X86::TEST8ri_NOREX:
     MI->setDesc(get(X86::TEST8ri));
     return true;
- 
+  case X86::MOV32ri64:
+    MI->setDesc(get(X86::MOV32ri));
+    return true;
+
   // KNL does not recognize dependency-breaking idioms for mask registers,
   // so kxnor %k1, %k1, %k2 has a RAW dependence on %k1.
   // Using %k0 as the undef input register is a performance heuristic based
diff --git a/llvm/lib/Target/X86/X86MCInstLower.cpp b/llvm/lib/Target/X86/X86MCInstLower.cpp
index eb70961077d..e1ca558f0f2 100644
--- a/llvm/lib/Target/X86/X86MCInstLower.cpp
+++ b/llvm/lib/Target/X86/X86MCInstLower.cpp
@@ -455,10 +455,6 @@ ReSimplify:
            "LEA has segment specified!");
     break;
 
-  case X86::MOV32ri64:
-    OutMI.setOpcode(X86::MOV32ri);
-    break;
-
   // Commute operands to get a smaller encoding by using VEX.R instead of VEX.B
   // if one of the registers is extended, but other isn't.
   case X86::VMOVZPQILo2PQIrr: