[llvm-commits] [llvm] r42653 - /llvm/trunk/lib/Target/X86/X86InstrInfo.cpp

[Evan Cheng]

Author: evancheng
Date: Fri Oct  5 16:55:32 2007
New Revision: 42653

URL: http://llvm.org/viewvc/llvm-project?rev=42653&view=rev
Log:
INC64_32r -> LEA64_32r is better than INC64_32r -> LEA32r, but it still can
cause performance degradation.

Modified:
    llvm/trunk/lib/Target/X86/X86InstrInfo.cpp

Modified: llvm/trunk/lib/Target/X86/X86InstrInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrInfo.cpp?rev=42653&r1=42652&r2=42653&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86InstrInfo.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86InstrInfo.cpp Fri Oct  5 16:55:32 2007
@@ -283,11 +283,9 @@
     switch (MIOpc) {
     default: return 0;
     case X86::INC64r:
-    case X86::INC32r:
-    case X86::INC64_32r: {
+    case X86::INC32r: {
       assert(MI->getNumOperands() >= 2 && "Unknown inc instruction!");
-      unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r
-        : (MIOpc == X86::INC64_32r ? X86::LEA64_32r : X86::LEA32r);
+      unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r : X86::LEA32r;
       NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src, 1);
       break;
     }
@@ -298,11 +296,9 @@
       NewMI = addRegOffset(BuildMI(get(X86::LEA16r), Dest), Src, 1);
       break;
     case X86::DEC64r:
-    case X86::DEC32r:
-    case X86::DEC64_32r: {
+    case X86::DEC32r: {
       assert(MI->getNumOperands() >= 2 && "Unknown dec instruction!");
-      unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r
-        : (MIOpc == X86::DEC64_32r ? X86::LEA64_32r : X86::LEA32r);
+      unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r : X86::LEA32r;
       NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src, -1);
       break;
     }