[llvm-commits] CVS: llvm/lib/Target/X86/X86InstrInfo.td

[Evan Cheng]

Changes in directory llvm/lib/Target/X86:

X86InstrInfo.td updated: 1.159 -> 1.160
---
Log message:

Add inc + dec patterns which fold load + stores.


---
Diffs of the changes:  (+12 -6)

 X86InstrInfo.td |   18 ++++++++++++------
 1 files changed, 12 insertions(+), 6 deletions(-)


Index: llvm/lib/Target/X86/X86InstrInfo.td
diff -u llvm/lib/Target/X86/X86InstrInfo.td:1.159 llvm/lib/Target/X86/X86InstrInfo.td:1.160
--- llvm/lib/Target/X86/X86InstrInfo.td:1.159	Mon Dec 12 18:54:44 2005
+++ llvm/lib/Target/X86/X86InstrInfo.td	Mon Dec 12 19:02:47 2005
@@ -715,9 +715,12 @@
                [(set R32:$dst, (add R32:$src, 1))]>;
 }
 let isTwoAddress = 0 in {
-  def INC8m  : I<0xFE, MRM0m, (ops i8mem :$dst), "inc{b} $dst", []>;
-  def INC16m : I<0xFF, MRM0m, (ops i16mem:$dst), "inc{w} $dst", []>, OpSize;
-  def INC32m : I<0xFF, MRM0m, (ops i32mem:$dst), "inc{l} $dst", []>;
+  def INC8m  : I<0xFE, MRM0m, (ops i8mem :$dst), "inc{b} $dst",
+               [(store (add (i8 (load addr:$dst)), 1), addr:$dst)]>;
+  def INC16m : I<0xFF, MRM0m, (ops i16mem:$dst), "inc{w} $dst",
+               [(store (add (i16 (load addr:$dst)), 1), addr:$dst)]>, OpSize;
+  def INC32m : I<0xFF, MRM0m, (ops i32mem:$dst), "inc{l} $dst",
+               [(store (add (i32 (load addr:$dst)), 1), addr:$dst)]>;
 }
 
 def DEC8r  : I<0xFE, MRM1r, (ops R8 :$dst, R8 :$src), "dec{b} $dst",
@@ -730,9 +733,12 @@
 }
 
 let isTwoAddress = 0 in {
-  def DEC8m  : I<0xFE, MRM1m, (ops i8mem :$dst), "dec{b} $dst", []>;
-  def DEC16m : I<0xFF, MRM1m, (ops i16mem:$dst), "dec{w} $dst", []>, OpSize;
-  def DEC32m : I<0xFF, MRM1m, (ops i32mem:$dst), "dec{l} $dst", []>;
+  def DEC8m  : I<0xFE, MRM1m, (ops i8mem :$dst), "dec{b} $dst",
+               [(store (add (i8 (load addr:$dst)), -1), addr:$dst)]>;
+  def DEC16m : I<0xFF, MRM1m, (ops i16mem:$dst), "dec{w} $dst",
+               [(store (add (i16 (load addr:$dst)), -1), addr:$dst)]>, OpSize;
+  def DEC32m : I<0xFF, MRM1m, (ops i32mem:$dst), "dec{l} $dst",
+               [(store (add (i32 (load addr:$dst)), -1), addr:$dst)]>;
 }
 
 // Logical operators...