diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.cpp | 4 | ||||
| -rw-r--r-- | lib/Target/X86/X86InstrShiftRotate.td | 23 |
2 files changed, 27 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp index f575e80184..2fb2ed2104 100644 --- a/lib/Target/X86/X86InstrInfo.cpp +++ b/lib/Target/X86/X86InstrInfo.cpp @@ -561,6 +561,10 @@ X86InstrInfo::X86InstrInfo(X86TargetMachine &tm) { X86::VSQRTPSYr_Int, X86::VSQRTPSYm_Int, TB_ALIGN_32 }, { X86::VBROADCASTSSYrr, X86::VBROADCASTSSYrm, TB_NO_REVERSE }, { X86::VBROADCASTSDYrr, X86::VBROADCASTSDYrm, TB_NO_REVERSE }, + + // BMI/BMI2 foldable instructions + { X86::RORX32ri, X86::RORX32mi, 0 }, + { X86::RORX64ri, X86::RORX64mi, 0 }, }; for (unsigned i = 0, e = array_lengthof(OpTbl1); i != e; ++i) { diff --git a/lib/Target/X86/X86InstrShiftRotate.td b/lib/Target/X86/X86InstrShiftRotate.td index bdeb63ffbd..fe7d0ecf89 100644 --- a/lib/Target/X86/X86InstrShiftRotate.td +++ b/lib/Target/X86/X86InstrShiftRotate.td @@ -839,6 +839,16 @@ def SHRD64mri8 : RIi8<0xAC, MRMDestMem, } // Defs = [EFLAGS] +def ROT32L2R_imm8 : SDNodeXForm<imm, [{ + // Convert a ROTL shamt to a ROTR shamt on 32-bit integer. + return getI8Imm(32 - N->getZExtValue()); +}]>; + +def ROT64L2R_imm8 : SDNodeXForm<imm, [{ + // Convert a ROTL shamt to a ROTR shamt on 64-bit integer. + return getI8Imm(64 - N->getZExtValue()); +}]>; + multiclass bmi_rotate<string asm, RegisterClass RC, X86MemOperand x86memop> { let neverHasSideEffects = 1 in { def ri : Ii8<0xF0, MRMSrcReg, (outs RC:$dst), (ins RC:$src1, i8imm:$src2), @@ -873,4 +883,17 @@ let Predicates = [HasBMI2] in { defm SHRX64 : bmi_shift<"shrx{q}", GR64, i64mem>, T8XD, VEX_W; defm SHLX32 : bmi_shift<"shlx{l}", GR32, i32mem>, T8, OpSize; defm SHLX64 : bmi_shift<"shlx{q}", GR64, i64mem>, T8, OpSize, VEX_W; + + // Prefer RORX which is non-destructive and doesn't update EFLAGS. + let AddedComplexity = 10 in { + def : Pat<(rotl GR32:$src, (i8 imm:$shamt)), + (RORX32ri GR32:$src, (ROT32L2R_imm8 imm:$shamt))>; + def : Pat<(rotl GR64:$src, (i8 imm:$shamt)), + (RORX64ri GR64:$src, (ROT64L2R_imm8 imm:$shamt))>; + } + + def : Pat<(rotl (loadi32 addr:$src), (i8 imm:$shamt)), + (RORX32mi addr:$src, (ROT32L2R_imm8 imm:$shamt))>; + def : Pat<(rotl (loadi64 addr:$src), (i8 imm:$shamt)), + (RORX64mi addr:$src, (ROT64L2R_imm8 imm:$shamt))>; } |