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Model hardwired inputs & outputs of x86 8-bit divides correctly.

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Fixes local RA miscompilation of gcc.c-torture/execute/20020904-1.c -O0.

llvm-svn: 57257
This commit is contained in:
Dale Johannesen 2008-10-07 18:54:28 +00:00
parent 66cc9d5e53
commit 3d2e449078
1 changed files with 4 additions and 4 deletions
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8
lib/Target/X86/X86InstrInfo.td
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@ -728,7 +728,7 @@ def IMUL32m : I<0xF7, MRM5m, (outs), (ins i32mem:$src),
}
// unsigned division/remainder
let Defs = [AX,EFLAGS], Uses = [AL,AH] in
let Defs = [AL,AH,EFLAGS], Uses = [AX] in
def DIV8r : I<0xF6, MRM6r, (outs), (ins GR8:$src), // AX/r8 = AL,AH
"div{b}\t$src", []>;
let Defs = [AX,DX,EFLAGS], Uses = [AX,DX] in
@ -738,7 +738,7 @@ let Defs = [EAX,EDX,EFLAGS], Uses = [EAX,EDX] in
def DIV32r : I<0xF7, MRM6r, (outs), (ins GR32:$src), // EDX:EAX/r32 = EAX,EDX
"div{l}\t$src", []>;
let mayLoad = 1 in {
let Defs = [AX,EFLAGS], Uses = [AL,AH] in
let Defs = [AL,AH,EFLAGS], Uses = [AX] in
def DIV8m : I<0xF6, MRM6m, (outs), (ins i8mem:$src), // AX/[mem8] = AL,AH
"div{b}\t$src", []>;
let Defs = [AX,DX,EFLAGS], Uses = [AX,DX] in
@ -750,7 +750,7 @@ def DIV32m : I<0xF7, MRM6m, (outs), (ins i32mem:$src), // EDX:EAX/[mem32] =
}
// Signed division/remainder.
let Defs = [AX,EFLAGS], Uses = [AL,AH] in
let Defs = [AL,AH,EFLAGS], Uses = [AX] in
def IDIV8r : I<0xF6, MRM7r, (outs), (ins GR8:$src), // AX/r8 = AL,AH
"idiv{b}\t$src", []>;
let Defs = [AX,DX,EFLAGS], Uses = [AX,DX] in
@ -760,7 +760,7 @@ let Defs = [EAX,EDX,EFLAGS], Uses = [EAX,EDX] in
def IDIV32r: I<0xF7, MRM7r, (outs), (ins GR32:$src), // EDX:EAX/r32 = EAX,EDX
"idiv{l}\t$src", []>;
let mayLoad = 1, mayLoad = 1 in {
let Defs = [AX,EFLAGS], Uses = [AL,AH] in
let Defs = [AL,AH,EFLAGS], Uses = [AX] in
def IDIV8m : I<0xF6, MRM7m, (outs), (ins i8mem:$src), // AX/[mem8] = AL,AH
"idiv{b}\t$src", []>;
let Defs = [AX,DX,EFLAGS], Uses = [AX,DX] in