Turn off the old way of handling debug information in the code generator. Use

[oota-llvm.git] / lib / Target / X86 / X86InstrInfo.td

diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index 9649c234de459716e2151935e66afb01f0a60fd4..19f1e6a4a39a7e0c91bc36838e477586a8c8a374 100644 (file)
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -2812,7 +2812,7 @@ def MOV32r0  : I<0x31, MRMInitReg,  (outs GR32:$dst), (ins),
 
 // Basic operations on GR16 / GR32 subclasses GR16_ and GR32_ which contains only
 // those registers that have GR8 sub-registers (i.e. AX - DX, EAX - EDX).
-let neverHasSideEffects = 1 in {
+let neverHasSideEffects = 1, isAsCheapAsAMove = 1 in {
 def MOV16to16_ : I<0x89, MRMDestReg, (outs GR16_:$dst), (ins GR16:$src),
                 "mov{w}\t{$src, $dst|$dst, $src}", []>, OpSize;
 def MOV32to32_ : I<0x89, MRMDestReg, (outs GR32_:$dst), (ins GR32:$src),
@@ -3612,6 +3612,17 @@ def : Pat<(parallel (X86smul_ovf (load addr:$src1), i32immSExt8:$src2),
                     (implicit EFLAGS)),
           (IMUL32rmi8 addr:$src1, i32immSExt8:$src2)>;
 
+// Optimize multiple with overflow by 2.
+let AddedComplexity = 2 in {
+def : Pat<(parallel (X86smul_ovf GR16:$src1, 2),
+                    (implicit EFLAGS)),
+          (ADD16rr GR16:$src1, GR16:$src1)>;
+
+def : Pat<(parallel (X86smul_ovf GR32:$src1, 2),
+                    (implicit EFLAGS)),
+          (ADD32rr GR32:$src1, GR32:$src1)>;
+}
+
 //===----------------------------------------------------------------------===//
 // Floating Point Stack Support
 //===----------------------------------------------------------------------===//