[llvm-commits] CVS: llvm/lib/Target/X86/X86InstrInfo.td X86TargetMachine.cpp

[Evan Cheng]

Changes in directory llvm/lib/Target/X86:

X86InstrInfo.td updated: 1.214 -> 1.215
X86TargetMachine.cpp updated: 1.94 -> 1.95
---
Log message:

A few more SH{L|R}D peepholes.


---
Diffs of the changes:  (+17 -1)

 X86InstrInfo.td      |   16 ++++++++++++++++
 X86TargetMachine.cpp |    2 +-
 2 files changed, 17 insertions(+), 1 deletion(-)


Index: llvm/lib/Target/X86/X86InstrInfo.td
diff -u llvm/lib/Target/X86/X86InstrInfo.td:1.214 llvm/lib/Target/X86/X86InstrInfo.td:1.215
--- llvm/lib/Target/X86/X86InstrInfo.td:1.214	Thu Jan 19 17:26:24 2006
+++ llvm/lib/Target/X86/X86InstrInfo.td	Thu Jan 19 19:13:30 2006
@@ -3073,17 +3073,33 @@
               (shl R32:$src2, (sub 32, CL:$amt))),
           (SHRD32rrCL R32:$src1, R32:$src2)>;
 
+def : Pat<(store (or (srl (loadi32 addr:$dst), CL:$amt),
+                     (shl R32:$src2, (sub 32, CL:$amt))), addr:$dst),
+          (SHRD32mrCL addr:$dst, R32:$src2)>;
+
 // (or (x << c) | (y >> (32 - c))) ==> (shld32 x, y, c)
 def : Pat<(or (shl R32:$src1, CL:$amt),
               (srl R32:$src2, (sub 32, CL:$amt))),
           (SHLD32rrCL R32:$src1, R32:$src2)>;
 
+def : Pat<(store (or (shl (loadi32 addr:$dst), CL:$amt),
+                     (srl R32:$src2, (sub 32, CL:$amt))), addr:$dst),
+          (SHLD32mrCL addr:$dst, R32:$src2)>;
+
 // (or (x >> c) | (y << (16 - c))) ==> (shrd16 x, y, c)
 def : Pat<(or (srl R16:$src1, CL:$amt),
               (shl R16:$src2, (sub 16, CL:$amt))),
           (SHRD16rrCL R16:$src1, R16:$src2)>;
 
+def : Pat<(store (or (srl (loadi16 addr:$dst), CL:$amt),
+                     (shl R16:$src2, (sub 16, CL:$amt))), addr:$dst),
+          (SHRD16mrCL addr:$dst, R16:$src2)>;
+
 // (or (x << c) | (y >> (16 - c))) ==> (shld16 x, y, c)
 def : Pat<(or (shl R16:$src1, CL:$amt),
               (srl R16:$src2, (sub 16, CL:$amt))),
           (SHLD16rrCL R16:$src1, R16:$src2)>;
+
+def : Pat<(store (or (shl (loadi16 addr:$dst), CL:$amt),
+                     (srl R16:$src2, (sub 16, CL:$amt))), addr:$dst),
+          (SHLD16mrCL addr:$dst, R16:$src2)>;


Index: llvm/lib/Target/X86/X86TargetMachine.cpp
diff -u llvm/lib/Target/X86/X86TargetMachine.cpp:1.94 llvm/lib/Target/X86/X86TargetMachine.cpp:1.95
--- llvm/lib/Target/X86/X86TargetMachine.cpp:1.94	Thu Jan 19 17:27:08 2006
+++ llvm/lib/Target/X86/X86TargetMachine.cpp	Thu Jan 19 19:13:30 2006
@@ -48,7 +48,7 @@
   cl::opt<bool, true> EnableX86DAGDAG("enable-x86-dag-isel", cl::Hidden,
                       cl::desc("Enable DAG-to-DAG isel for X86"),
                       cl::location(X86DAGIsel),
-                      cl::init(false));
+                      cl::init(true));
   
   // FIXME: This should eventually be handled with target triples and
   // subtarget support!