//===- X86InstrCompiler.td - Compiler Pseudos and Patterns -*- tablegen -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
-//
+//
//===----------------------------------------------------------------------===//
//
// This file describes the various pseudo instructions used by the compiler,
return getI32Imm((unsigned)N->getZExtValue());
}]>;
+def GetLo8XForm : SDNodeXForm<imm, [{
+ // Transformation function: get the low 8 bits.
+ return getI8Imm((uint8_t)N->getZExtValue());
+}]>;
+
//===----------------------------------------------------------------------===//
// Random Pseudo Instructions.
imm:$regsavefi,
imm:$offset)]>;
-// Dynamic stack allocation yields _alloca call for Cygwin/Mingw targets. Calls
-// to _alloca is needed to probe the stack when allocating more than 4k bytes in
-// one go. Touching the stack at 4K increments is necessary to ensure that the
-// guard pages used by the OS virtual memory manager are allocated in correct
-// sequence.
+// The VAARG_64 pseudo-instruction takes the address of the va_list,
+// and places the address of the next argument into a register.
+let Defs = [EFLAGS] in
+def VAARG_64 : I<0, Pseudo,
+ (outs GR64:$dst),
+ (ins i8mem:$ap, i32imm:$size, i8imm:$mode, i32imm:$align),
+ "#VAARG_64 $dst, $ap, $size, $mode, $align",
+ [(set GR64:$dst,
+ (X86vaarg64 addr:$ap, imm:$size, imm:$mode, imm:$align)),
+ (implicit EFLAGS)]>;
+
+// Dynamic stack allocation yields a _chkstk or _alloca call for all Windows
+// targets. These calls are needed to probe the stack when allocating more than
+// 4k bytes in one go. Touching the stack at 4K increments is necessary to
+// ensure that the guard pages used by the OS virtual memory manager are
+// allocated in correct sequence.
// The main point of having separate instruction are extra unmodelled effects
// (compared to ordinary calls) like stack pointer change.
let Defs = [EAX, ESP, EFLAGS], Uses = [ESP] in
- def MINGW_ALLOCA : I<0, Pseudo, (outs), (ins),
- "# dynamic stack allocation",
- [(X86MingwAlloca)]>;
+ def WIN_ALLOCA : I<0, Pseudo, (outs), (ins),
+ "# dynamic stack allocation",
+ [(X86WinAlloca)]>;
}
def MOV16r0 : I<0x31, MRMInitReg, (outs GR16:$dst), (ins),
"",
[(set GR16:$dst, 0)]>, OpSize;
-
+
// FIXME: Set encoding to pseudo.
def MOV32r0 : I<0x31, MRMInitReg, (outs GR32:$dst), (ins), "",
[(set GR32:$dst, 0)]>;
// 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],
+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)]>;
// 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 in
+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)]>;
-
// Use sbb to materialize carry bit.
let Uses = [EFLAGS], Defs = [EFLAGS], isCodeGenOnly = 1 in {
// FIXME: These are pseudo ops that should be replaced with Pat<> patterns.
def : Pat<(i64 (anyext (i8 (X86setcc_c X86_COND_B, EFLAGS)))),
(SETB_C64r)>;
-
+
//===----------------------------------------------------------------------===//
// String Pseudo Instructions
//
let Defs = [RCX,RDI,RSI], Uses = [RCX,RDI,RSI], isCodeGenOnly = 1 in
def REP_MOVSQ : RI<0xA5, RawFrm, (outs), (ins), "{rep;movsq|rep movsq}",
[(X86rep_movs i64)]>, REP;
-
+
// FIXME: Should use "(X86rep_stos AL)" as the pattern.
let Defs = [ECX,EDI], Uses = [AL,ECX,EDI], isCodeGenOnly = 1 in
Requires<[In64BitMode]>;
// Darwin TLS Support
-// For i386, the address of the thunk is passed on the stack, on return the
-// address of the variable is in %eax. %ecx is trashed during the function
+// For i386, the address of the thunk is passed on the stack, on return the
+// address of the variable is in %eax. %ecx is trashed during the function
// call. All other registers are preserved.
let Defs = [EAX, ECX],
Uses = [ESP],
[(X86TLSCall addr:$sym)]>,
Requires<[In32BitMode]>;
-// For x86_64, the address of the thunk is passed in %rdi, on return
+// For x86_64, the address of the thunk is passed in %rdi, on return
// the address of the variable is in %rax. All other registers are preserved.
let Defs = [RAX],
Uses = [RDI],
[(X86TLSCall addr:$sym)]>,
Requires<[In64BitMode]>;
+
+//===----------------------------------------------------------------------===//
+// Conditional Move Pseudo Instructions
+
+let Constraints = "$src1 = $dst" in {
+
+// Conditional moves
+let Uses = [EFLAGS] in {
+
+// X86 doesn't have 8-bit conditional moves. Use a customInserter to
+// emit control flow. An alternative to this is to mark i8 SELECT as Promote,
+// however that requires promoting the operands, and can induce additional
+// i8 register pressure. Note that CMOV_GR8 is conservatively considered to
+// clobber EFLAGS, because if one of the operands is zero, the expansion
+// could involve an xor.
+let usesCustomInserter = 1, Constraints = "", Defs = [EFLAGS] in {
+def CMOV_GR8 : I<0, Pseudo,
+ (outs GR8:$dst), (ins GR8:$src1, GR8:$src2, i8imm:$cond),
+ "#CMOV_GR8 PSEUDO!",
+ [(set GR8:$dst, (X86cmov GR8:$src1, GR8:$src2,
+ imm:$cond, EFLAGS))]>;
+
+let Predicates = [NoCMov] in {
+def CMOV_GR32 : I<0, Pseudo,
+ (outs GR32:$dst), (ins GR32:$src1, GR32:$src2, i8imm:$cond),
+ "#CMOV_GR32* PSEUDO!",
+ [(set GR32:$dst,
+ (X86cmov GR32:$src1, GR32:$src2, imm:$cond, EFLAGS))]>;
+def CMOV_GR16 : I<0, Pseudo,
+ (outs GR16:$dst), (ins GR16:$src1, GR16:$src2, i8imm:$cond),
+ "#CMOV_GR16* PSEUDO!",
+ [(set GR16:$dst,
+ (X86cmov GR16:$src1, GR16:$src2, imm:$cond, EFLAGS))]>;
+def CMOV_RFP32 : I<0, Pseudo,
+ (outs RFP32:$dst),
+ (ins RFP32:$src1, RFP32:$src2, i8imm:$cond),
+ "#CMOV_RFP32 PSEUDO!",
+ [(set RFP32:$dst,
+ (X86cmov RFP32:$src1, RFP32:$src2, imm:$cond,
+ EFLAGS))]>;
+def CMOV_RFP64 : I<0, Pseudo,
+ (outs RFP64:$dst),
+ (ins RFP64:$src1, RFP64:$src2, i8imm:$cond),
+ "#CMOV_RFP64 PSEUDO!",
+ [(set RFP64:$dst,
+ (X86cmov RFP64:$src1, RFP64:$src2, imm:$cond,
+ EFLAGS))]>;
+def CMOV_RFP80 : I<0, Pseudo,
+ (outs RFP80:$dst),
+ (ins RFP80:$src1, RFP80:$src2, i8imm:$cond),
+ "#CMOV_RFP80 PSEUDO!",
+ [(set RFP80:$dst,
+ (X86cmov RFP80:$src1, RFP80:$src2, imm:$cond,
+ EFLAGS))]>;
+} // Predicates = [NoCMov]
+} // UsesCustomInserter = 1, Constraints = "", Defs = [EFLAGS]
+} // Uses = [EFLAGS]
+
+} // Constraints = "$src1 = $dst" in
+
+
//===----------------------------------------------------------------------===//
// Atomic Instruction Pseudo Instructions
//===----------------------------------------------------------------------===//
// Atomic exchange, and, or, xor
let Constraints = "$val = $dst", Defs = [EFLAGS],
usesCustomInserter = 1 in {
-
+
def ATOMAND8 : I<0, Pseudo, (outs GR8:$dst),(ins i8mem:$ptr, GR8:$val),
- "#ATOMAND8 PSEUDO!",
+ "#ATOMAND8 PSEUDO!",
[(set GR8:$dst, (atomic_load_and_8 addr:$ptr, GR8:$val))]>;
def ATOMOR8 : I<0, Pseudo, (outs GR8:$dst),(ins i8mem:$ptr, GR8:$val),
- "#ATOMOR8 PSEUDO!",
+ "#ATOMOR8 PSEUDO!",
[(set GR8:$dst, (atomic_load_or_8 addr:$ptr, GR8:$val))]>;
def ATOMXOR8 : I<0, Pseudo,(outs GR8:$dst),(ins i8mem:$ptr, GR8:$val),
- "#ATOMXOR8 PSEUDO!",
+ "#ATOMXOR8 PSEUDO!",
[(set GR8:$dst, (atomic_load_xor_8 addr:$ptr, GR8:$val))]>;
def ATOMNAND8 : I<0, Pseudo,(outs GR8:$dst),(ins i8mem:$ptr, GR8:$val),
- "#ATOMNAND8 PSEUDO!",
+ "#ATOMNAND8 PSEUDO!",
[(set GR8:$dst, (atomic_load_nand_8 addr:$ptr, GR8:$val))]>;
def ATOMAND16 : I<0, Pseudo, (outs GR16:$dst),(ins i16mem:$ptr, GR16:$val),
- "#ATOMAND16 PSEUDO!",
+ "#ATOMAND16 PSEUDO!",
[(set GR16:$dst, (atomic_load_and_16 addr:$ptr, GR16:$val))]>;
def ATOMOR16 : I<0, Pseudo, (outs GR16:$dst),(ins i16mem:$ptr, GR16:$val),
- "#ATOMOR16 PSEUDO!",
+ "#ATOMOR16 PSEUDO!",
[(set GR16:$dst, (atomic_load_or_16 addr:$ptr, GR16:$val))]>;
def ATOMXOR16 : I<0, Pseudo,(outs GR16:$dst),(ins i16mem:$ptr, GR16:$val),
- "#ATOMXOR16 PSEUDO!",
+ "#ATOMXOR16 PSEUDO!",
[(set GR16:$dst, (atomic_load_xor_16 addr:$ptr, GR16:$val))]>;
def ATOMNAND16 : I<0, Pseudo,(outs GR16:$dst),(ins i16mem:$ptr, GR16:$val),
- "#ATOMNAND16 PSEUDO!",
+ "#ATOMNAND16 PSEUDO!",
[(set GR16:$dst, (atomic_load_nand_16 addr:$ptr, GR16:$val))]>;
def ATOMMIN16: I<0, Pseudo, (outs GR16:$dst), (ins i16mem:$ptr, GR16:$val),
- "#ATOMMIN16 PSEUDO!",
+ "#ATOMMIN16 PSEUDO!",
[(set GR16:$dst, (atomic_load_min_16 addr:$ptr, GR16:$val))]>;
def ATOMMAX16: I<0, Pseudo, (outs GR16:$dst),(ins i16mem:$ptr, GR16:$val),
- "#ATOMMAX16 PSEUDO!",
+ "#ATOMMAX16 PSEUDO!",
[(set GR16:$dst, (atomic_load_max_16 addr:$ptr, GR16:$val))]>;
def ATOMUMIN16: I<0, Pseudo, (outs GR16:$dst),(ins i16mem:$ptr, GR16:$val),
- "#ATOMUMIN16 PSEUDO!",
+ "#ATOMUMIN16 PSEUDO!",
[(set GR16:$dst, (atomic_load_umin_16 addr:$ptr, GR16:$val))]>;
def ATOMUMAX16: I<0, Pseudo, (outs GR16:$dst),(ins i16mem:$ptr, GR16:$val),
- "#ATOMUMAX16 PSEUDO!",
+ "#ATOMUMAX16 PSEUDO!",
[(set GR16:$dst, (atomic_load_umax_16 addr:$ptr, GR16:$val))]>;
def ATOMAND32 : I<0, Pseudo, (outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
- "#ATOMAND32 PSEUDO!",
+ "#ATOMAND32 PSEUDO!",
[(set GR32:$dst, (atomic_load_and_32 addr:$ptr, GR32:$val))]>;
def ATOMOR32 : I<0, Pseudo, (outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
- "#ATOMOR32 PSEUDO!",
+ "#ATOMOR32 PSEUDO!",
[(set GR32:$dst, (atomic_load_or_32 addr:$ptr, GR32:$val))]>;
def ATOMXOR32 : I<0, Pseudo,(outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
- "#ATOMXOR32 PSEUDO!",
+ "#ATOMXOR32 PSEUDO!",
[(set GR32:$dst, (atomic_load_xor_32 addr:$ptr, GR32:$val))]>;
def ATOMNAND32 : I<0, Pseudo,(outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
- "#ATOMNAND32 PSEUDO!",
+ "#ATOMNAND32 PSEUDO!",
[(set GR32:$dst, (atomic_load_nand_32 addr:$ptr, GR32:$val))]>;
def ATOMMIN32: I<0, Pseudo, (outs GR32:$dst), (ins i32mem:$ptr, GR32:$val),
- "#ATOMMIN32 PSEUDO!",
+ "#ATOMMIN32 PSEUDO!",
[(set GR32:$dst, (atomic_load_min_32 addr:$ptr, GR32:$val))]>;
def ATOMMAX32: I<0, Pseudo, (outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
- "#ATOMMAX32 PSEUDO!",
+ "#ATOMMAX32 PSEUDO!",
[(set GR32:$dst, (atomic_load_max_32 addr:$ptr, GR32:$val))]>;
def ATOMUMIN32: I<0, Pseudo, (outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
- "#ATOMUMIN32 PSEUDO!",
+ "#ATOMUMIN32 PSEUDO!",
[(set GR32:$dst, (atomic_load_umin_32 addr:$ptr, GR32:$val))]>;
def ATOMUMAX32: I<0, Pseudo, (outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
- "#ATOMUMAX32 PSEUDO!",
+ "#ATOMUMAX32 PSEUDO!",
[(set GR32:$dst, (atomic_load_umax_32 addr:$ptr, GR32:$val))]>;
-
+
def ATOMAND64 : I<0, Pseudo, (outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
- "#ATOMAND64 PSEUDO!",
+ "#ATOMAND64 PSEUDO!",
[(set GR64:$dst, (atomic_load_and_64 addr:$ptr, GR64:$val))]>;
def ATOMOR64 : I<0, Pseudo, (outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
- "#ATOMOR64 PSEUDO!",
+ "#ATOMOR64 PSEUDO!",
[(set GR64:$dst, (atomic_load_or_64 addr:$ptr, GR64:$val))]>;
def ATOMXOR64 : I<0, Pseudo,(outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
- "#ATOMXOR64 PSEUDO!",
+ "#ATOMXOR64 PSEUDO!",
[(set GR64:$dst, (atomic_load_xor_64 addr:$ptr, GR64:$val))]>;
def ATOMNAND64 : I<0, Pseudo,(outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
- "#ATOMNAND64 PSEUDO!",
+ "#ATOMNAND64 PSEUDO!",
[(set GR64:$dst, (atomic_load_nand_64 addr:$ptr, GR64:$val))]>;
def ATOMMIN64: I<0, Pseudo, (outs GR64:$dst), (ins i64mem:$ptr, GR64:$val),
- "#ATOMMIN64 PSEUDO!",
+ "#ATOMMIN64 PSEUDO!",
[(set GR64:$dst, (atomic_load_min_64 addr:$ptr, GR64:$val))]>;
def ATOMMAX64: I<0, Pseudo, (outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
- "#ATOMMAX64 PSEUDO!",
+ "#ATOMMAX64 PSEUDO!",
[(set GR64:$dst, (atomic_load_max_64 addr:$ptr, GR64:$val))]>;
def ATOMUMIN64: I<0, Pseudo, (outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
- "#ATOMUMIN64 PSEUDO!",
+ "#ATOMUMIN64 PSEUDO!",
[(set GR64:$dst, (atomic_load_umin_64 addr:$ptr, GR64:$val))]>;
def ATOMUMAX64: I<0, Pseudo, (outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
- "#ATOMUMAX64 PSEUDO!",
+ "#ATOMUMAX64 PSEUDO!",
[(set GR64:$dst, (atomic_load_umax_64 addr:$ptr, GR64:$val))]>;
}
-let Constraints = "$val1 = $dst1, $val2 = $dst2",
+let Constraints = "$val1 = $dst1, $val2 = $dst2",
Defs = [EFLAGS, EAX, EBX, ECX, EDX],
Uses = [EAX, EBX, ECX, EDX],
mayLoad = 1, mayStore = 1,
// Memory barriers
-// TODO: Get this to fold the constant into the instruction.
+// TODO: Get this to fold the constant into the instruction.
+let isCodeGenOnly = 1 in
def OR32mrLocked : I<0x09, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$zero),
"lock\n\t"
"or{l}\t{$zero, $dst|$dst, $zero}",
"#MEMBARRIER",
[(X86MemBarrier)]>, Requires<[HasSSE2]>;
-// TODO: Get this to fold the constant into the instruction.
-let hasSideEffects = 1, Defs = [ESP] in
+// TODO: Get this to fold the constant into the instruction.
+let hasSideEffects = 1, Defs = [ESP], isCodeGenOnly = 1 in
def Int_MemBarrierNoSSE64 : RI<0x09, MRM1r, (outs), (ins GR64:$zero),
"lock\n\t"
"or{q}\t{$zero, (%rsp)|(%rsp), $zero}",
// Optimized codegen when the non-memory output is not used.
-let Defs = [EFLAGS], mayLoad = 1, mayStore = 1 in {
+let Defs = [EFLAGS], mayLoad = 1, mayStore = 1, isCodeGenOnly = 1 in {
def LOCK_ADD8mr : I<0x00, MRMDestMem, (outs), (ins i8mem:$dst, GR8:$src2),
"lock\n\t"
"add{b}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_ADD64mr : RI<0x01, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src2),
"lock\n\t"
"add{q}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
-
+
def LOCK_ADD8mi : Ii8<0x80, MRM0m, (outs), (ins i8mem :$dst, i8imm :$src2),
"lock\n\t"
"add{b}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_SUB16mr : I<0x29, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src2),
"lock\n\t"
"sub{w}\t{$src2, $dst|$dst, $src2}", []>, OpSize, LOCK;
-def LOCK_SUB32mr : I<0x29, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src2),
+def LOCK_SUB32mr : I<0x29, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src2),
"lock\n\t"
"sub{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
-def LOCK_SUB64mr : RI<0x29, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src2),
+def LOCK_SUB64mr : RI<0x29, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src2),
"lock\n\t"
"sub{q}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
-def LOCK_SUB8mi : Ii8<0x80, MRM5m, (outs), (ins i8mem :$dst, i8imm:$src2),
+def LOCK_SUB8mi : Ii8<0x80, MRM5m, (outs), (ins i8mem :$dst, i8imm:$src2),
"lock\n\t"
"sub{b}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
-def LOCK_SUB16mi : Ii16<0x81, MRM5m, (outs), (ins i16mem:$dst, i16imm:$src2),
+def LOCK_SUB16mi : Ii16<0x81, MRM5m, (outs), (ins i16mem:$dst, i16imm:$src2),
"lock\n\t"
"sub{w}\t{$src2, $dst|$dst, $src2}", []>, OpSize, LOCK;
-def LOCK_SUB32mi : Ii32<0x81, MRM5m, (outs), (ins i32mem:$dst, i32imm:$src2),
+def LOCK_SUB32mi : Ii32<0x81, MRM5m, (outs), (ins i32mem:$dst, i32imm:$src2),
"lock\n\t"
"sub{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_SUB64mi32 : RIi32<0x81, MRM5m, (outs),
"lock\n\t"
"sub{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_SUB64mi8 : RIi8<0x83, MRM5m, (outs),
- (ins i64mem:$dst, i64i8imm :$src2),
+ (ins i64mem:$dst, i64i8imm :$src2),
"lock\n\t"
"sub{q}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
}
// Atomic compare and swap.
-let Defs = [EAX, EDX, EFLAGS], Uses = [EAX, EBX, ECX, EDX] in {
+let Defs = [EAX, EDX, EFLAGS], Uses = [EAX, EBX, ECX, EDX],
+ isCodeGenOnly = 1 in {
def LCMPXCHG8B : I<0xC7, MRM1m, (outs), (ins i64mem:$ptr),
"lock\n\t"
"cmpxchg8b\t$ptr",
[(X86cas8 addr:$ptr)]>, TB, LOCK;
}
-let Defs = [AL, EFLAGS], Uses = [AL] in {
+let Defs = [AL, EFLAGS], Uses = [AL], isCodeGenOnly = 1 in {
def LCMPXCHG8 : I<0xB0, MRMDestMem, (outs), (ins i8mem:$ptr, GR8:$swap),
"lock\n\t"
"cmpxchg{b}\t{$swap, $ptr|$ptr, $swap}",
[(X86cas addr:$ptr, GR8:$swap, 1)]>, TB, LOCK;
}
-let Defs = [AX, EFLAGS], Uses = [AX] in {
+let Defs = [AX, EFLAGS], Uses = [AX], isCodeGenOnly = 1 in {
def LCMPXCHG16 : I<0xB1, MRMDestMem, (outs), (ins i16mem:$ptr, GR16:$swap),
"lock\n\t"
"cmpxchg{w}\t{$swap, $ptr|$ptr, $swap}",
[(X86cas addr:$ptr, GR16:$swap, 2)]>, TB, OpSize, LOCK;
}
-let Defs = [EAX, EFLAGS], Uses = [EAX] in {
+let Defs = [EAX, EFLAGS], Uses = [EAX], isCodeGenOnly = 1 in {
def LCMPXCHG32 : I<0xB1, MRMDestMem, (outs), (ins i32mem:$ptr, GR32:$swap),
"lock\n\t"
"cmpxchg{l}\t{$swap, $ptr|$ptr, $swap}",
[(X86cas addr:$ptr, GR32:$swap, 4)]>, TB, LOCK;
}
-let Defs = [RAX, EFLAGS], Uses = [RAX] in {
+let Defs = [RAX, EFLAGS], Uses = [RAX], isCodeGenOnly = 1 in {
def LCMPXCHG64 : RI<0xB1, MRMDestMem, (outs), (ins i64mem:$ptr, GR64:$swap),
"lock\n\t"
"cmpxchgq\t$swap,$ptr",
}
// Atomic exchange and add
-let Constraints = "$val = $dst", Defs = [EFLAGS] in {
+let Constraints = "$val = $dst", Defs = [EFLAGS], isCodeGenOnly = 1 in {
def LXADD8 : I<0xC0, MRMSrcMem, (outs GR8:$dst), (ins GR8:$val, i8mem:$ptr),
"lock\n\t"
"xadd{b}\t{$val, $ptr|$ptr, $val}",
Requires<[In32BitMode]>;
// FIXME: This is disabled for 32-bit PIC mode because the global base
-// register which is part of the address mode may be assigned a
+// register which is part of the address mode may be assigned a
// callee-saved register.
def : Pat<(X86tcret (load addr:$dst), imm:$off),
(TCRETURNmi addr:$dst, imm:$off)>,
def : Pat<(zextloadi64i1 addr:$src), (MOVZX64rm8 addr:$src)>;
// extload bool -> extload byte
-// When extloading from 16-bit and smaller memory locations into 64-bit
-// registers, use zero-extending loads so that the entire 64-bit register is
+// When extloading from 16-bit and smaller memory locations into 64-bit
+// registers, use zero-extending loads so that the entire 64-bit register is
// defined, avoiding partial-register updates.
def : Pat<(extloadi8i1 addr:$src), (MOV8rm addr:$src)>;
def : Pat<(i64 (zext def32:$src)),
(SUBREG_TO_REG (i64 0), GR32:$src, sub_32bit)>;
+//===----------------------------------------------------------------------===//
+// Pattern match OR as ADD
+//===----------------------------------------------------------------------===//
+
+// If safe, we prefer to pattern match OR as ADD at isel time. ADD can be
+// 3-addressified into an LEA instruction to avoid copies. However, we also
+// want to finally emit these instructions as an or at the end of the code
+// generator to make the generated code easier to read. To do this, we select
+// into "disjoint bits" pseudo ops.
+
+// Treat an 'or' node is as an 'add' if the or'ed bits are known to be zero.
+def or_is_add : PatFrag<(ops node:$lhs, node:$rhs), (or node:$lhs, node:$rhs),[{
+ if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N->getOperand(1)))
+ return CurDAG->MaskedValueIsZero(N->getOperand(0), CN->getAPIntValue());
+
+ unsigned BitWidth = N->getValueType(0).getScalarType().getSizeInBits();
+ APInt Mask = APInt::getAllOnesValue(BitWidth);
+ APInt KnownZero0, KnownOne0;
+ CurDAG->ComputeMaskedBits(N->getOperand(0), Mask, KnownZero0, KnownOne0, 0);
+ APInt KnownZero1, KnownOne1;
+ CurDAG->ComputeMaskedBits(N->getOperand(1), Mask, KnownZero1, KnownOne1, 0);
+ return (~KnownZero0 & ~KnownZero1) == 0;
+}]>;
+
+
+// (or x1, x2) -> (add x1, x2) if two operands are known not to share bits.
+let AddedComplexity = 5 in { // Try this before the selecting to OR
+
+let isCommutable = 1, isConvertibleToThreeAddress = 1,
+ Constraints = "$src1 = $dst", Defs = [EFLAGS] in {
+def ADD16rr_DB : I<0, Pseudo, (outs GR16:$dst), (ins GR16:$src1, GR16:$src2),
+ "", // orw/addw REG, REG
+ [(set GR16:$dst, (or_is_add GR16:$src1, GR16:$src2))]>;
+def ADD32rr_DB : I<0, Pseudo, (outs GR32:$dst), (ins GR32:$src1, GR32:$src2),
+ "", // orl/addl REG, REG
+ [(set GR32:$dst, (or_is_add GR32:$src1, GR32:$src2))]>;
+def ADD64rr_DB : I<0, Pseudo, (outs GR64:$dst), (ins GR64:$src1, GR64:$src2),
+ "", // orq/addq REG, REG
+ [(set GR64:$dst, (or_is_add GR64:$src1, GR64:$src2))]>;
+
+// NOTE: These are order specific, we want the ri8 forms to be listed
+// first so that they are slightly preferred to the ri forms.
+
+def ADD16ri8_DB : I<0, Pseudo,
+ (outs GR16:$dst), (ins GR16:$src1, i16i8imm:$src2),
+ "", // orw/addw REG, imm8
+ [(set GR16:$dst,(or_is_add GR16:$src1,i16immSExt8:$src2))]>;
+def ADD16ri_DB : I<0, Pseudo, (outs GR16:$dst), (ins GR16:$src1, i16imm:$src2),
+ "", // orw/addw REG, imm
+ [(set GR16:$dst, (or_is_add GR16:$src1, imm:$src2))]>;
+
+def ADD32ri8_DB : I<0, Pseudo,
+ (outs GR32:$dst), (ins GR32:$src1, i32i8imm:$src2),
+ "", // orl/addl REG, imm8
+ [(set GR32:$dst,(or_is_add GR32:$src1,i32immSExt8:$src2))]>;
+def ADD32ri_DB : I<0, Pseudo, (outs GR32:$dst), (ins GR32:$src1, i32imm:$src2),
+ "", // orl/addl REG, imm
+ [(set GR32:$dst, (or_is_add GR32:$src1, imm:$src2))]>;
+
+
+def ADD64ri8_DB : I<0, Pseudo,
+ (outs GR64:$dst), (ins GR64:$src1, i64i8imm:$src2),
+ "", // orq/addq REG, imm8
+ [(set GR64:$dst, (or_is_add GR64:$src1,
+ i64immSExt8:$src2))]>;
+def ADD64ri32_DB : I<0, Pseudo,
+ (outs GR64:$dst), (ins GR64:$src1, i64i32imm:$src2),
+ "", // orq/addq REG, imm
+ [(set GR64:$dst, (or_is_add GR64:$src1,
+ i64immSExt32:$src2))]>;
+}
+} // AddedComplexity
+
+
//===----------------------------------------------------------------------===//
// Some peepholes
//===----------------------------------------------------------------------===//
def : Pat<(store (add (loadi64 addr:$dst), 0x00000000800000000), addr:$dst),
(SUB64mi32 addr:$dst, 0xffffffff80000000)>;
-// Use a 32-bit and with implicit zero-extension instead of a 64-bit and if it
-// has an immediate with at least 32 bits of leading zeros, to avoid needing to
-// materialize that immediate in a register first.
+// To avoid needing to materialize an immediate in a register, use a 32-bit and
+// with implicit zero-extension instead of a 64-bit and if the immediate has at
+// least 32 bits of leading zeros. If in addition the last 32 bits can be
+// represented with a sign extension of a 8 bit constant, use that.
+
+def : Pat<(and GR64:$src, i64immZExt32SExt8:$imm),
+ (SUBREG_TO_REG
+ (i64 0),
+ (AND32ri8
+ (EXTRACT_SUBREG GR64:$src, sub_32bit),
+ (i32 (GetLo8XForm imm:$imm))),
+ sub_32bit)>;
+
def : Pat<(and GR64:$src, i64immZExt32:$imm),
(SUBREG_TO_REG
(i64 0),
(MOVZX32rr16 (EXTRACT_SUBREG GR32:$src1, sub_16bit))>;
// r & (2^8-1) ==> movz
def : Pat<(and GR32:$src1, 0xff),
- (MOVZX32rr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src1,
+ (MOVZX32rr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src1,
GR32_ABCD)),
sub_8bit))>,
Requires<[In32BitMode]>;
// r & (2^8-1) ==> movz
def : Pat<(and GR16:$src1, 0xff),
- (MOVZX16rr8 (EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src1,
+ (MOVZX16rr8 (EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src1,
GR16_ABCD)),
sub_8bit))>,
Requires<[In32BitMode]>;
def : Pat<(sext_inreg GR32:$src, i16),
(MOVSX32rr16 (EXTRACT_SUBREG GR32:$src, sub_16bit))>;
def : Pat<(sext_inreg GR32:$src, i8),
- (MOVSX32rr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src,
+ (MOVSX32rr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src,
GR32_ABCD)),
sub_8bit))>,
Requires<[In32BitMode]>;
def : Pat<(sext_inreg GR16:$src, i8),
- (MOVSX16rr8 (EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src,
+ (MOVSX16rr8 (EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src,
GR16_ABCD)),
sub_8bit))>,
Requires<[In32BitMode]>;
sub_16bit)>,
Requires<[In32BitMode]>;
def : Pat<(i32 (zext (srl_su GR16:$src, (i8 8)))),
- (MOVZX32rr8 (EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src,
+ (MOVZX32rr8 (EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src,
GR16_ABCD)),
sub_8bit_hi))>,
Requires<[In32BitMode]>;
def : Pat<(i32 (anyext (srl_su GR16:$src, (i8 8)))),
- (MOVZX32rr8 (EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src,
+ (MOVZX32rr8 (EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src,
GR16_ABCD)),
sub_8bit_hi))>,
Requires<[In32BitMode]>;
def : Pat<(and (srl_su GR32:$src, (i8 8)), (i32 255)),
- (MOVZX32rr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src,
+ (MOVZX32rr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src,
GR32_ABCD)),
sub_8bit_hi))>,
Requires<[In32BitMode]>;
def : Pat<(srl (and_su GR32:$src, 0xff00), (i8 8)),
- (MOVZX32rr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src,
+ (MOVZX32rr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src,
GR32_ABCD)),
sub_8bit_hi))>,
Requires<[In32BitMode]>;
-
+
// h-register tricks.
// For now, be conservative on x86-64 and use an h-register extract only if the
// value is immediately zero-extended or stored, which are somewhat common
sub_8bit_hi))>,
Requires<[In64BitMode]>;
def : Pat<(srl (and_su GR32:$src, 0xff00), (i8 8)),
- (MOVZX32_NOREXrr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src,
+ (MOVZX32_NOREXrr8 (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS GR32:$src,
GR32_ABCD)),
sub_8bit_hi))>,
Requires<[In64BitMode]>;
(EXTRACT_SUBREG (i16 (COPY_TO_REGCLASS GR16:$src, GR16_ABCD)),
sub_8bit_hi))>,
Requires<[In64BitMode]>;
-
-
+
+
// (shl x, 1) ==> (add x, x)
def : Pat<(shl GR8 :$src1, (i8 1)), (ADD8rr GR8 :$src1, GR8 :$src1)>;
def : Pat<(shl GR16:$src1, (i8 1)), (ADD16rr GR16:$src1, GR16:$src1)>;
def : Pat<(i32 (anyext (i16 (X86setcc_c X86_COND_B, EFLAGS)))),
(SETB_C32r)>;
-// (or x1, x2) -> (add x1, x2) if two operands are known not to share bits.
-let AddedComplexity = 5 in { // Try this before the selecting to OR
-def : Pat<(or_is_add GR16:$src1, imm:$src2),
- (ADD16ri GR16:$src1, imm:$src2)>;
-def : Pat<(or_is_add GR32:$src1, imm:$src2),
- (ADD32ri GR32:$src1, imm:$src2)>;
-def : Pat<(or_is_add GR16:$src1, i16immSExt8:$src2),
- (ADD16ri8 GR16:$src1, i16immSExt8:$src2)>;
-def : Pat<(or_is_add GR32:$src1, i32immSExt8:$src2),
- (ADD32ri8 GR32:$src1, i32immSExt8:$src2)>;
-def : Pat<(or_is_add GR16:$src1, GR16:$src2),
- (ADD16rr GR16:$src1, GR16:$src2)>;
-def : Pat<(or_is_add GR32:$src1, GR32:$src2),
- (ADD32rr GR32:$src1, GR32:$src2)>;
-def : Pat<(or_is_add GR64:$src1, i64immSExt8:$src2),
- (ADD64ri8 GR64:$src1, i64immSExt8:$src2)>;
-def : Pat<(or_is_add GR64:$src1, i64immSExt32:$src2),
- (ADD64ri32 GR64:$src1, i64immSExt32:$src2)>;
-def : Pat<(or_is_add GR64:$src1, GR64:$src2),
- (ADD64rr GR64:$src1, GR64:$src2)>;
-} // AddedComplexity
+
+
//===----------------------------------------------------------------------===//
// EFLAGS-defining Patterns
projects / oota-llvm.git / blobdiff