diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrCompiler.td | 46 |
1 files changed, 25 insertions, 21 deletions
diff --git a/llvm/lib/Target/X86/X86InstrCompiler.td b/llvm/lib/Target/X86/X86InstrCompiler.td index a5c05de0199..281c51b2f37 100644 --- a/llvm/lib/Target/X86/X86InstrCompiler.td +++ b/llvm/lib/Target/X86/X86InstrCompiler.td @@ -1458,58 +1458,62 @@ def : Pat<(shl GR16:$src1, (i8 1)), (ADD16rr GR16:$src1, GR16:$src1)>; def : Pat<(shl GR32:$src1, (i8 1)), (ADD32rr GR32:$src1, GR32:$src1)>; def : Pat<(shl GR64:$src1, (i8 1)), (ADD64rr GR64:$src1, GR64:$src1)>; +// Helper imms that check if a mask doesn't change significant shift bits. +def immShift32 : ImmLeaf<i8, [{ return CountTrailingOnes_32(Imm) >= 5; }]>; +def immShift64 : ImmLeaf<i8, [{ return CountTrailingOnes_32(Imm) >= 6; }]>; + // (shl x (and y, 31)) ==> (shl x, y) -def : Pat<(shl GR8:$src1, (and CL, 31)), +def : Pat<(shl GR8:$src1, (and CL, immShift32)), (SHL8rCL GR8:$src1)>; -def : Pat<(shl GR16:$src1, (and CL, 31)), +def : Pat<(shl GR16:$src1, (and CL, immShift32)), (SHL16rCL GR16:$src1)>; -def : Pat<(shl GR32:$src1, (and CL, 31)), +def : Pat<(shl GR32:$src1, (and CL, immShift32)), (SHL32rCL GR32:$src1)>; -def : Pat<(store (shl (loadi8 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (shl (loadi8 addr:$dst), (and CL, immShift32)), addr:$dst), (SHL8mCL addr:$dst)>; -def : Pat<(store (shl (loadi16 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (shl (loadi16 addr:$dst), (and CL, immShift32)), addr:$dst), (SHL16mCL addr:$dst)>; -def : Pat<(store (shl (loadi32 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (shl (loadi32 addr:$dst), (and CL, immShift32)), addr:$dst), (SHL32mCL addr:$dst)>; -def : Pat<(srl GR8:$src1, (and CL, 31)), +def : Pat<(srl GR8:$src1, (and CL, immShift32)), (SHR8rCL GR8:$src1)>; -def : Pat<(srl GR16:$src1, (and CL, 31)), +def : Pat<(srl GR16:$src1, (and CL, immShift32)), (SHR16rCL GR16:$src1)>; -def : Pat<(srl GR32:$src1, (and CL, 31)), +def : Pat<(srl GR32:$src1, (and CL, immShift32)), (SHR32rCL GR32:$src1)>; -def : Pat<(store (srl (loadi8 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (srl (loadi8 addr:$dst), (and CL, immShift32)), addr:$dst), (SHR8mCL addr:$dst)>; -def : Pat<(store (srl (loadi16 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (srl (loadi16 addr:$dst), (and CL, immShift32)), addr:$dst), (SHR16mCL addr:$dst)>; -def : Pat<(store (srl (loadi32 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (srl (loadi32 addr:$dst), (and CL, immShift32)), addr:$dst), (SHR32mCL addr:$dst)>; -def : Pat<(sra GR8:$src1, (and CL, 31)), +def : Pat<(sra GR8:$src1, (and CL, immShift32)), (SAR8rCL GR8:$src1)>; -def : Pat<(sra GR16:$src1, (and CL, 31)), +def : Pat<(sra GR16:$src1, (and CL, immShift32)), (SAR16rCL GR16:$src1)>; -def : Pat<(sra GR32:$src1, (and CL, 31)), +def : Pat<(sra GR32:$src1, (and CL, immShift32)), (SAR32rCL GR32:$src1)>; -def : Pat<(store (sra (loadi8 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (sra (loadi8 addr:$dst), (and CL, immShift32)), addr:$dst), (SAR8mCL addr:$dst)>; -def : Pat<(store (sra (loadi16 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (sra (loadi16 addr:$dst), (and CL, immShift32)), addr:$dst), (SAR16mCL addr:$dst)>; -def : Pat<(store (sra (loadi32 addr:$dst), (and CL, 31)), addr:$dst), +def : Pat<(store (sra (loadi32 addr:$dst), (and CL, immShift32)), addr:$dst), (SAR32mCL addr:$dst)>; // (shl x (and y, 63)) ==> (shl x, y) -def : Pat<(shl GR64:$src1, (and CL, 63)), +def : Pat<(shl GR64:$src1, (and CL, immShift64)), (SHL64rCL GR64:$src1)>; def : Pat<(store (shl (loadi64 addr:$dst), (and CL, 63)), addr:$dst), (SHL64mCL addr:$dst)>; -def : Pat<(srl GR64:$src1, (and CL, 63)), +def : Pat<(srl GR64:$src1, (and CL, immShift64)), (SHR64rCL GR64:$src1)>; def : Pat<(store (srl (loadi64 addr:$dst), (and CL, 63)), addr:$dst), (SHR64mCL addr:$dst)>; -def : Pat<(sra GR64:$src1, (and CL, 63)), +def : Pat<(sra GR64:$src1, (and CL, immShift64)), (SAR64rCL GR64:$src1)>; def : Pat<(store (sra (loadi64 addr:$dst), (and CL, 63)), addr:$dst), (SAR64mCL addr:$dst)>; |
