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[X86] Add NotMemoryFoldable to more instructions. 

These include PUSH/POP instructions that don't match the manual table. This also includes CMPXCHG which we never emit in non-locked form.

llvm-svn: 334479
This commit is contained in:
Craig Topper 2018-06-12 07:32:17 +00:00
parent 51805de092
commit 5799e4df75
1 changed files with 22 additions and 14 deletions
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36
llvm/lib/Target/X86/X86InstrInfo.td
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@ -1192,9 +1192,9 @@ def POP16r : I<0x58, AddRegFrm, (outs GR16:$reg), (ins), "pop{w}\t$reg", []>,
def POP32r : I<0x58, AddRegFrm, (outs GR32:$reg), (ins), "pop{l}\t$reg", []>,
OpSize32, Requires<[Not64BitMode]>;
def POP16rmr: I<0x8F, MRM0r, (outs GR16:$reg), (ins), "pop{w}\t$reg", []>,
OpSize16;
OpSize16, NotMemoryFoldable;
def POP32rmr: I<0x8F, MRM0r, (outs GR32:$reg), (ins), "pop{l}\t$reg", []>,
OpSize32, Requires<[Not64BitMode]>;
OpSize32, Requires<[Not64BitMode]>, NotMemoryFoldable;
} // mayLoad, SchedRW
let mayStore = 1, mayLoad = 1, SchedRW = [WriteRMW] in {
def POP16rmm: I<0x8F, MRM0m, (outs), (ins i16mem:$dst), "pop{w}\t$dst", []>,
@ -1209,9 +1209,9 @@ def PUSH16r : I<0x50, AddRegFrm, (outs), (ins GR16:$reg), "push{w}\t$reg",[]>,
def PUSH32r : I<0x50, AddRegFrm, (outs), (ins GR32:$reg), "push{l}\t$reg",[]>,
OpSize32, Requires<[Not64BitMode]>;
def PUSH16rmr: I<0xFF, MRM6r, (outs), (ins GR16:$reg), "push{w}\t$reg",[]>,
OpSize16;
OpSize16, NotMemoryFoldable;
def PUSH32rmr: I<0xFF, MRM6r, (outs), (ins GR32:$reg), "push{l}\t$reg",[]>,
OpSize32, Requires<[Not64BitMode]>;
OpSize32, Requires<[Not64BitMode]>, NotMemoryFoldable;
def PUSH16i8 : Ii8<0x6a, RawFrm, (outs), (ins i16i8imm:$imm),
"push{w}\t$imm", []>, OpSize16;
@ -1280,7 +1280,7 @@ let mayLoad = 1, SchedRW = [WriteLoad] in {
def POP64r : I<0x58, AddRegFrm, (outs GR64:$reg), (ins), "pop{q}\t$reg", []>,
OpSize32, Requires<[In64BitMode]>;
def POP64rmr: I<0x8F, MRM0r, (outs GR64:$reg), (ins), "pop{q}\t$reg", []>,
OpSize32, Requires<[In64BitMode]>;
OpSize32, Requires<[In64BitMode]>, NotMemoryFoldable;
} // mayLoad, SchedRW
let mayLoad = 1, mayStore = 1, SchedRW = [WriteRMW] in
def POP64rmm: I<0x8F, MRM0m, (outs), (ins i64mem:$dst), "pop{q}\t$dst", []>,
@ -1289,7 +1289,7 @@ let mayStore = 1, SchedRW = [WriteStore] in {
def PUSH64r : I<0x50, AddRegFrm, (outs), (ins GR64:$reg), "push{q}\t$reg", []>,
OpSize32, Requires<[In64BitMode]>;
def PUSH64rmr: I<0xFF, MRM6r, (outs), (ins GR64:$reg), "push{q}\t$reg", []>,
OpSize32, Requires<[In64BitMode]>;
OpSize32, Requires<[In64BitMode]>, NotMemoryFoldable;
} // mayStore, SchedRW
let mayLoad = 1, mayStore = 1, SchedRW = [WriteRMW] in {
def PUSH64rmm: I<0xFF, MRM6m, (outs), (ins i64mem:$src), "push{q}\t$src", []>,
@ -2022,32 +2022,40 @@ def XADD64rm : RI<0xC1, MRMSrcMem, (outs GR64:$dst),
let SchedRW = [WriteALU], hasSideEffects = 0 in {
let Defs = [AL, EFLAGS], Uses = [AL] in
def CMPXCHG8rr : I<0xB0, MRMDestReg, (outs GR8:$dst), (ins GR8:$src),
"cmpxchg{b}\t{$src, $dst|$dst, $src}", []>, TB;
"cmpxchg{b}\t{$src, $dst|$dst, $src}", []>, TB,
NotMemoryFoldable;
let Defs = [AX, EFLAGS], Uses = [AX] in
def CMPXCHG16rr : I<0xB1, MRMDestReg, (outs GR16:$dst), (ins GR16:$src),
"cmpxchg{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize16;
"cmpxchg{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize16,
NotMemoryFoldable;
let Defs = [EAX, EFLAGS], Uses = [EAX] in
def CMPXCHG32rr : I<0xB1, MRMDestReg, (outs GR32:$dst), (ins GR32:$src),
"cmpxchg{l}\t{$src, $dst|$dst, $src}", []>, TB, OpSize32;
"cmpxchg{l}\t{$src, $dst|$dst, $src}", []>, TB, OpSize32,
NotMemoryFoldable;
let Defs = [RAX, EFLAGS], Uses = [RAX] in
def CMPXCHG64rr : RI<0xB1, MRMDestReg, (outs GR64:$dst), (ins GR64:$src),
"cmpxchg{q}\t{$src, $dst|$dst, $src}", []>, TB;
"cmpxchg{q}\t{$src, $dst|$dst, $src}", []>, TB,
NotMemoryFoldable;
} // SchedRW, hasSideEffects
let SchedRW = [WriteALULd, WriteRMW], mayLoad = 1, mayStore = 1,
hasSideEffects = 0 in {
let Defs = [AL, EFLAGS], Uses = [AL] in
def CMPXCHG8rm : I<0xB0, MRMDestMem, (outs), (ins i8mem:$dst, GR8:$src),
"cmpxchg{b}\t{$src, $dst|$dst, $src}", []>, TB;
"cmpxchg{b}\t{$src, $dst|$dst, $src}", []>, TB,
NotMemoryFoldable;
let Defs = [AX, EFLAGS], Uses = [AX] in
def CMPXCHG16rm : I<0xB1, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src),
"cmpxchg{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize16;
"cmpxchg{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize16,
NotMemoryFoldable;
let Defs = [EAX, EFLAGS], Uses = [EAX] in
def CMPXCHG32rm : I<0xB1, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src),
"cmpxchg{l}\t{$src, $dst|$dst, $src}", []>, TB, OpSize32;
"cmpxchg{l}\t{$src, $dst|$dst, $src}", []>, TB, OpSize32,
NotMemoryFoldable;
let Defs = [RAX, EFLAGS], Uses = [RAX] in
def CMPXCHG64rm : RI<0xB1, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src),
"cmpxchg{q}\t{$src, $dst|$dst, $src}", []>, TB;
"cmpxchg{q}\t{$src, $dst|$dst, $src}", []>, TB,
NotMemoryFoldable;
let Defs = [EAX, EDX, EFLAGS], Uses = [EAX, EBX, ECX, EDX] in
def CMPXCHG8B : I<0xC7, MRM1m, (outs), (ins i64mem:$dst),