[X86] Add phony registers for high halves of regs with low halves

Add registers still missing after r328016 (D43353):
- for bits 15-8  of SI, DI, BP, SP (*H), and R8-R15 (*BH),
- for bits 31-16 of R8-R15 (*WH).

Thanks to Craig Topper for pointing it out.

llvm-svn: 336134

1 files changed, 6 insertions, 1 deletions

diff --git a/llvm/lib/Target/X86/X86RegisterInfo.cpp b/llvm/lib/Target/X86/X86RegisterInfo.cpp
index f979cc51da4..55842a4a209 100644
--- a/llvm/lib/Target/X86/X86RegisterInfo.cpp
+++ b/llvm/lib/Target/X86/X86RegisterInfo.cpp
@@ -552,6 +552,10 @@ BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
     Reserved.set(X86::DIL);
     Reserved.set(X86::BPL);
     Reserved.set(X86::SPL);
+    Reserved.set(X86::SIH);
+    Reserved.set(X86::DIH);
+    Reserved.set(X86::BPH);
+    Reserved.set(X86::SPH);
 
     for (unsigned n = 0; n != 8; ++n) {
       // R8, R9, ...
@@ -571,7 +575,8 @@ BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
   }
 
   assert(checkAllSuperRegsMarked(Reserved,
-                                 {X86::SIL, X86::DIL, X86::BPL, X86::SPL}));
+                                 {X86::SIL, X86::DIL, X86::BPL, X86::SPL,
+                                  X86::SIH, X86::DIH, X86::BPH, X86::SPH}));
   return Reserved;
 }