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Mark hasExtraDefRegAllocReq=1 on LDRD.

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The previous cleanup of LDRD got overzealous and removed it, causing post-RA
scheduling to get overzealous in breaking antidependencies and invalidate these instructions. Hilarity and invalid assembly ensued.

rdar://9244161


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129144 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2011-04-08 18:47:05 +00:00
parent 626ab1ccad
commit 5b03a3a59a
1 changed files with 5 additions and 1 deletions
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6
lib/Target/ARM/ARMInstrInfo.td
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@ -1629,7 +1629,7 @@ def LDRSB : AI3ld<0b1101, 1, (outs GPR:$Rt), (ins addrmode3:$addr), LdMiscFrm,
IIC_iLoad_bh_r, "ldrsb", "\t$Rt, $addr",
[(set GPR:$Rt, (sextloadi8 addrmode3:$addr))]>;
let mayLoad = 1, neverHasSideEffects = 1 in {
let mayLoad = 1, neverHasSideEffects = 1, hasExtraDefRegAllocReq = 1 in {
// Load doubleword
def LDRD : AI3ld<0b1101, 0, (outs GPR:$Rd, GPR:$dst2),
(ins addrmode3:$addr), LdMiscFrm,
@ -1704,6 +1704,7 @@ let mayLoad = 1, neverHasSideEffects = 1 in {
defm LDRH : AI3_ldridx<0b1011, 1, "ldrh", IIC_iLoad_bh_ru>;
defm LDRSH : AI3_ldridx<0b1111, 1, "ldrsh", IIC_iLoad_bh_ru>;
defm LDRSB : AI3_ldridx<0b1101, 1, "ldrsb", IIC_iLoad_bh_ru>;
let hasExtraDefRegAllocReq = 1 in {
def LDRD_PRE : AI3ldstidx<0b1101, 0, 1, 1, (outs GPR:$Rt, GPR:$Rt2, GPR:$Rn_wb),
(ins addrmode3:$addr), IndexModePre,
LdMiscFrm, IIC_iLoad_d_ru,
@ -1729,6 +1730,7 @@ def LDRD_POST: AI3ldstidx<0b1101, 0, 1, 0, (outs GPR:$Rt, GPR:$Rt2, GPR:$Rn_wb),
let Inst{11-8} = offset{7-4}; // imm7_4/zero
let Inst{3-0} = offset{3-0}; // imm3_0/Rm
}
} // hasExtraDefRegAllocReq = 1
} // mayLoad = 1, neverHasSideEffects = 1
// LDRT, LDRBT, LDRSBT, LDRHT, LDRSHT are for disassembly only.
@ -1836,6 +1838,7 @@ def STRH_POST: AI3stridx<0b1011, 0, 0, (outs GPR:$Rn_wb),
GPR:$Rn, am3offset:$offset))]>;
// For disassembly only
let mayStore = 1, neverHasSideEffects = 1, hasExtraSrcRegAllocReq = 1 in {
def STRD_PRE : AI3stdpr<(outs GPR:$base_wb),
(ins GPR:$src1, GPR:$src2, GPR:$base, am3offset:$offset),
StMiscFrm, IIC_iStore_d_ru,
@ -1848,6 +1851,7 @@ def STRD_POST: AI3stdpo<(outs GPR:$base_wb),
StMiscFrm, IIC_iStore_d_ru,
"strd", "\t$src1, $src2, [$base], $offset",
"$base = $base_wb", []>;
} // mayStore = 1, neverHasSideEffects = 1, hasExtraSrcRegAllocReq = 1
// STRT, STRBT, and STRHT are for disassembly only.