diff options
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.td | 14 | ||||
| -rw-r--r-- | lib/Target/X86/X86TargetMachine.cpp | 2 |
2 files changed, 13 insertions, 3 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index ba159007f0..92b0c96455 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -3068,12 +3068,22 @@ def : Pat<(shl R8 :$src1, (i8 1)), (ADD8rr R8 :$src1, R8 :$src1)>; def : Pat<(shl R16:$src1, (i8 1)), (ADD16rr R16:$src1, R16:$src1)>; def : Pat<(shl R32:$src1, (i8 1)), (ADD32rr R32:$src1, R32:$src1)>; -// (or (x >> c) | (y << (32 - c))) ==> (shrd x, y, c) +// (or (x >> c) | (y << (32 - c))) ==> (shrd32 x, y, c) def : Pat<(or (srl R32:$src1, CL:$amt), (shl R32:$src2, (sub 32, CL:$amt))), (SHRD32rrCL R32:$src1, R32:$src2)>; -// (or (x << c) | (y >> (32 - c))) ==> (shld x, y, c) +// (or (x << c) | (y >> (32 - c))) ==> (shld32 x, y, c) def : Pat<(or (shl R32:$src1, CL:$amt), (srl R32:$src2, (sub 32, CL:$amt))), (SHLD32rrCL R32:$src1, R32:$src2)>; + +// (or (x >> c) | (y << (16 - c))) ==> (shrd16 x, y, c) +def : Pat<(or (srl R16:$src1, CL:$amt), + (shl R16:$src2, (sub 16, CL:$amt))), + (SHRD16rrCL R16:$src1, R16:$src2)>; + +// (or (x << c) | (y >> (16 - c))) ==> (shld16 x, y, c) +def : Pat<(or (shl R16:$src1, CL:$amt), + (srl R16:$src2, (sub 16, CL:$amt))), + (SHLD16rrCL R16:$src1, R16:$src2)>; diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp index 4af0b06c00..a484b9dac9 100644 --- a/lib/Target/X86/X86TargetMachine.cpp +++ b/lib/Target/X86/X86TargetMachine.cpp @@ -48,7 +48,7 @@ namespace { 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! |