diff options
Diffstat (limited to 'contrib/llvm/lib/Target/X86/X86InstrCompiler.td')
| -rw-r--r-- | contrib/llvm/lib/Target/X86/X86InstrCompiler.td | 130 |
1 files changed, 66 insertions, 64 deletions
diff --git a/contrib/llvm/lib/Target/X86/X86InstrCompiler.td b/contrib/llvm/lib/Target/X86/X86InstrCompiler.td index d9ff0c6..7d10b67 100644 --- a/contrib/llvm/lib/Target/X86/X86InstrCompiler.td +++ b/contrib/llvm/lib/Target/X86/X86InstrCompiler.td @@ -129,12 +129,13 @@ def SEG_ALLOCA_64 : I<0, Pseudo, (outs GR64:$dst), (ins GR64:$size), // The MSVC runtime contains an _ftol2 routine for converting floating-point // to integer values. It has a strange calling convention: the input is -// popped from the x87 stack, and the return value is given in EDX:EAX. No -// other registers (aside from flags) are touched. +// popped from the x87 stack, and the return value is given in EDX:EAX. ECX is +// used as a temporary register. No other registers (aside from flags) are +// touched. // Microsoft toolchains do not support 80-bit precision, so a WIN_FTOL_80 // variant is unnecessary. -let Defs = [EAX, EDX, EFLAGS], FPForm = SpecialFP in { +let Defs = [EAX, EDX, ECX, EFLAGS], FPForm = SpecialFP in { def WIN_FTOL_32 : I<0, Pseudo, (outs), (ins RFP32:$src), "# win32 fptoui", [(X86WinFTOL RFP32:$src)]>, @@ -216,48 +217,38 @@ def MORESTACK_RET_RESTORE_R10 : I<0, Pseudo, (outs), (ins), // Alias Instructions //===----------------------------------------------------------------------===// -// Alias instructions that map movr0 to xor. +// Alias instruction mapping movr0 to xor. // FIXME: remove when we can teach regalloc that xor reg, reg is ok. // FIXME: Set encoding to pseudo. let Defs = [EFLAGS], isReMaterializable = 1, isAsCheapAsAMove = 1, - isCodeGenOnly = 1 in { -def MOV8r0 : I<0x30, MRMInitReg, (outs GR8 :$dst), (ins), "", - [(set GR8:$dst, 0)], IIC_ALU_NONMEM>, Sched<[WriteZero]>; - -// We want to rewrite MOV16r0 in terms of MOV32r0, because it's a smaller -// encoding and avoids a partial-register update sometimes, but doing so -// at isel time interferes with rematerialization in the current register -// allocator. For now, this is rewritten when the instruction is lowered -// to an MCInst. -def MOV16r0 : I<0x31, MRMInitReg, (outs GR16:$dst), (ins), - "", - [(set GR16:$dst, 0)], IIC_ALU_NONMEM>, OpSize, - Sched<[WriteZero]>; - -// FIXME: Set encoding to pseudo. + isCodeGenOnly = 1 in def MOV32r0 : I<0x31, MRMInitReg, (outs GR32:$dst), (ins), "", [(set GR32:$dst, 0)], IIC_ALU_NONMEM>, Sched<[WriteZero]>; -} -// We want to rewrite MOV64r0 in terms of MOV32r0, because it's sometimes a -// smaller encoding, but doing so at isel time interferes with rematerialization -// in the current register allocator. For now, this is rewritten when the -// instruction is lowered to an MCInst. -// FIXME: AddedComplexity gives this a higher priority than MOV64ri32. Remove -// when we have a better way to specify isel priority. -let Defs = [EFLAGS], isCodeGenOnly=1, - AddedComplexity = 1, isReMaterializable = 1, isAsCheapAsAMove = 1 in -def MOV64r0 : I<0x31, MRMInitReg, (outs GR64:$dst), (ins), "", - [(set GR64:$dst, 0)], IIC_ALU_NONMEM>, Sched<[WriteZero]>; +// Other widths can also make use of the 32-bit xor, which may have a smaller +// encoding and avoid partial register updates. +def : Pat<(i8 0), (EXTRACT_SUBREG (MOV32r0), sub_8bit)>; +def : Pat<(i16 0), (EXTRACT_SUBREG (MOV32r0), sub_16bit)>; +def : Pat<(i64 0), (SUBREG_TO_REG (i64 0), (MOV32r0), sub_32bit)> { + let AddedComplexity = 20; +} // Materialize i64 constant where top 32-bits are zero. This could theoretically // use MOV32ri with a SUBREG_TO_REG to represent the zero-extension, however // that would make it more difficult to rematerialize. let AddedComplexity = 1, isReMaterializable = 1, isAsCheapAsAMove = 1, - isCodeGenOnly = 1 in -def MOV64ri64i32 : Ii32<0xB8, AddRegFrm, (outs GR64:$dst), (ins i64i32imm:$src), - "", [(set GR64:$dst, i64immZExt32:$src)], - IIC_ALU_NONMEM>, Sched<[WriteALU]>; + isCodeGenOnly = 1, neverHasSideEffects = 1 in +def MOV32ri64 : Ii32<0xb8, AddRegFrm, (outs GR32:$dst), (ins i64i32imm:$src), + "", [], IIC_ALU_NONMEM>, Sched<[WriteALU]>; + +// This 64-bit pseudo-move can be used for both a 64-bit constant that is +// actually the zero-extension of a 32-bit constant, and for labels in the +// x86-64 small code model. +def mov64imm32 : ComplexPattern<i64, 1, "SelectMOV64Imm32", [imm, X86Wrapper]>; + +let AddedComplexity = 1 in +def : Pat<(i64 mov64imm32:$src), + (SUBREG_TO_REG (i64 0), (MOV32ri64 mov64imm32:$src), sub_32bit)>; // Use sbb to materialize carry bit. let Uses = [EFLAGS], Defs = [EFLAGS], isPseudo = 1, SchedRW = [WriteALU] in { @@ -893,6 +884,24 @@ let Uses = [EFLAGS], usesCustomInserter = 1 in { [(set VR256:$dst, (v4i64 (X86cmov VR256:$t, VR256:$f, imm:$cond, EFLAGS)))]>; + def CMOV_V8I64 : I<0, Pseudo, + (outs VR512:$dst), (ins VR512:$t, VR512:$f, i8imm:$cond), + "#CMOV_V8I64 PSEUDO!", + [(set VR512:$dst, + (v8i64 (X86cmov VR512:$t, VR512:$f, imm:$cond, + EFLAGS)))]>; + def CMOV_V8F64 : I<0, Pseudo, + (outs VR512:$dst), (ins VR512:$t, VR512:$f, i8imm:$cond), + "#CMOV_V8F64 PSEUDO!", + [(set VR512:$dst, + (v8f64 (X86cmov VR512:$t, VR512:$f, imm:$cond, + EFLAGS)))]>; + def CMOV_V16F32 : I<0, Pseudo, + (outs VR512:$dst), (ins VR512:$t, VR512:$f, i8imm:$cond), + "#CMOV_V16F32 PSEUDO!", + [(set VR512:$dst, + (v16f32 (X86cmov VR512:$t, VR512:$f, imm:$cond, + EFLAGS)))]>; } @@ -926,8 +935,6 @@ def : Pat<(store (i32 (X86Wrapper texternalsym:$src)), addr:$dst), def : Pat<(store (i32 (X86Wrapper tblockaddress:$src)), addr:$dst), (MOV32mi addr:$dst, tblockaddress:$src)>; - - // ConstantPool GlobalAddress, ExternalSymbol, and JumpTable when not in small // code model mode, should use 'movabs'. FIXME: This is really a hack, the // 'movabs' predicate should handle this sort of thing. @@ -942,20 +949,6 @@ def : Pat<(i64 (X86Wrapper texternalsym:$dst)), def : Pat<(i64 (X86Wrapper tblockaddress:$dst)), (MOV64ri tblockaddress:$dst)>, Requires<[FarData]>; -// In static codegen with small code model, we can get the address of a label -// into a register with 'movl'. FIXME: This is a hack, the 'imm' predicate of -// the MOV64ri64i32 should accept these. -def : Pat<(i64 (X86Wrapper tconstpool :$dst)), - (MOV64ri64i32 tconstpool :$dst)>, Requires<[SmallCode]>; -def : Pat<(i64 (X86Wrapper tjumptable :$dst)), - (MOV64ri64i32 tjumptable :$dst)>, Requires<[SmallCode]>; -def : Pat<(i64 (X86Wrapper tglobaladdr :$dst)), - (MOV64ri64i32 tglobaladdr :$dst)>, Requires<[SmallCode]>; -def : Pat<(i64 (X86Wrapper texternalsym:$dst)), - (MOV64ri64i32 texternalsym:$dst)>, Requires<[SmallCode]>; -def : Pat<(i64 (X86Wrapper tblockaddress:$dst)), - (MOV64ri64i32 tblockaddress:$dst)>, Requires<[SmallCode]>; - // In kernel code model, we can get the address of a label // into a register with 'movq'. FIXME: This is a hack, the 'imm' predicate of // the MOV64ri32 should accept these. @@ -989,14 +982,12 @@ def : Pat<(store (i64 (X86Wrapper tblockaddress:$src)), addr:$dst), (MOV64mi32 addr:$dst, tblockaddress:$src)>, Requires<[NearData, IsStatic]>; - - // Calls // tls has some funny stuff here... // This corresponds to movabs $foo@tpoff, %rax def : Pat<(i64 (X86Wrapper tglobaltlsaddr :$dst)), - (MOV64ri tglobaltlsaddr :$dst)>; + (MOV64ri32 tglobaltlsaddr :$dst)>; // This corresponds to add $foo@tpoff, %rax def : Pat<(add GR64:$src1, (X86Wrapper tglobaltlsaddr :$dst)), (ADD64ri32 GR64:$src1, tglobaltlsaddr :$dst)>; @@ -1119,7 +1110,8 @@ defm : CMOVmr<X86_COND_NO, CMOVO16rm , CMOVO32rm , CMOVO64rm>; def : Pat<(zextloadi8i1 addr:$src), (MOV8rm addr:$src)>; def : Pat<(zextloadi16i1 addr:$src), (MOVZX16rm8 addr:$src)>; def : Pat<(zextloadi32i1 addr:$src), (MOVZX32rm8 addr:$src)>; -def : Pat<(zextloadi64i1 addr:$src), (MOVZX64rm8 addr:$src)>; +def : Pat<(zextloadi64i1 addr:$src), + (SUBREG_TO_REG (i64 0), (MOVZX32rm8 addr:$src), sub_32bit)>; // extload bool -> extload byte // When extloading from 16-bit and smaller memory locations into 64-bit @@ -1133,14 +1125,16 @@ def : Pat<(extloadi16i8 addr:$src), (MOVZX16rm8 addr:$src)>; def : Pat<(extloadi32i8 addr:$src), (MOVZX32rm8 addr:$src)>; def : Pat<(extloadi32i16 addr:$src), (MOVZX32rm16 addr:$src)>; -def : Pat<(extloadi64i1 addr:$src), (MOVZX64rm8 addr:$src)>; -def : Pat<(extloadi64i8 addr:$src), (MOVZX64rm8 addr:$src)>; -def : Pat<(extloadi64i16 addr:$src), (MOVZX64rm16 addr:$src)>; // For other extloads, use subregs, since the high contents of the register are // defined after an extload. +def : Pat<(extloadi64i1 addr:$src), + (SUBREG_TO_REG (i64 0), (MOVZX32rm8 addr:$src), sub_32bit)>; +def : Pat<(extloadi64i8 addr:$src), + (SUBREG_TO_REG (i64 0), (MOVZX32rm8 addr:$src), sub_32bit)>; +def : Pat<(extloadi64i16 addr:$src), + (SUBREG_TO_REG (i64 0), (MOVZX32rm16 addr:$src), sub_32bit)>; def : Pat<(extloadi64i32 addr:$src), - (SUBREG_TO_REG (i64 0), (MOV32rm addr:$src), - sub_32bit)>; + (SUBREG_TO_REG (i64 0), (MOV32rm addr:$src), sub_32bit)>; // anyext. Define these to do an explicit zero-extend to // avoid partial-register updates. @@ -1152,8 +1146,10 @@ def : Pat<(i32 (anyext GR8 :$src)), (MOVZX32rr8 GR8 :$src)>; def : Pat<(i32 (anyext GR16:$src)), (INSERT_SUBREG (i32 (IMPLICIT_DEF)), GR16:$src, sub_16bit)>; -def : Pat<(i64 (anyext GR8 :$src)), (MOVZX64rr8 GR8 :$src)>; -def : Pat<(i64 (anyext GR16:$src)), (MOVZX64rr16 GR16 :$src)>; +def : Pat<(i64 (anyext GR8 :$src)), + (SUBREG_TO_REG (i64 0), (MOVZX32rr8 GR8 :$src), sub_32bit)>; +def : Pat<(i64 (anyext GR16:$src)), + (SUBREG_TO_REG (i64 0), (MOVZX32rr16 GR16 :$src), sub_32bit)>; def : Pat<(i64 (anyext GR32:$src)), (SUBREG_TO_REG (i64 0), GR32:$src, sub_32bit)>; @@ -1318,13 +1314,19 @@ def : Pat<(and GR16:$src1, 0xff), // r & (2^32-1) ==> movz def : Pat<(and GR64:$src, 0x00000000FFFFFFFF), - (MOVZX64rr32 (EXTRACT_SUBREG GR64:$src, sub_32bit))>; + (SUBREG_TO_REG (i64 0), + (MOV32rr (EXTRACT_SUBREG GR64:$src, sub_32bit)), + sub_32bit)>; // r & (2^16-1) ==> movz def : Pat<(and GR64:$src, 0xffff), - (MOVZX64rr16 (i16 (EXTRACT_SUBREG GR64:$src, sub_16bit)))>; + (SUBREG_TO_REG (i64 0), + (MOVZX32rr16 (i16 (EXTRACT_SUBREG GR64:$src, sub_16bit))), + sub_32bit)>; // r & (2^8-1) ==> movz def : Pat<(and GR64:$src, 0xff), - (MOVZX64rr8 (i8 (EXTRACT_SUBREG GR64:$src, sub_8bit)))>; + (SUBREG_TO_REG (i64 0), + (MOVZX32rr8 (i8 (EXTRACT_SUBREG GR64:$src, sub_8bit))), + sub_32bit)>; // r & (2^8-1) ==> movz def : Pat<(and GR32:$src1, 0xff), (MOVZX32rr8 (EXTRACT_SUBREG GR32:$src1, sub_8bit))>, |
