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Mark some pattern-less instructions as neverHasSideEffects.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73252 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-06-12 20:46:18 +00:00
parent 5d96fdac41
commit cd799b99cb
4 changed files with 10 additions and 2 deletions
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5
lib/Target/ARM/ARMInstrInfo.td
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@ -451,7 +451,7 @@ multiclass AsXI1_bin_c_irs<bits<4> opcod, string opc, PatFrag opnode> {
/// the function. The first operand is the ID# for this instruction, the second
/// is the index into the MachineConstantPool that this is, the third is the
/// size in bytes of this constant pool entry.
let isNotDuplicable = 1 in
let neverHasSideEffects = 1, isNotDuplicable = 1 in
def CONSTPOOL_ENTRY :
PseudoInst<(outs), (ins cpinst_operand:$instid, cpinst_operand:$cpidx,
i32imm:$size),
@ -771,6 +771,7 @@ def STM : AXI4st<(outs),
// Move Instructions.
//
let neverHasSideEffects = 1 in
def MOVr : AsI1<0b1101, (outs GPR:$dst), (ins GPR:$src), DPFrm,
"mov", " $dst, $src", []>, UnaryDP;
def MOVs : AsI1<0b1101, (outs GPR:$dst), (ins so_reg:$src), DPSoRegFrm,
@ -946,6 +947,7 @@ def MLA : AsMul1I<0b0000001, (outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c),
[(set GPR:$dst, (add (mul GPR:$a, GPR:$b), GPR:$c))]>;
// Extra precision multiplies with low / high results
let neverHasSideEffects = 1 in {
def SMULL : AsMul1I<0b0000110, (outs GPR:$ldst, GPR:$hdst),
(ins GPR:$a, GPR:$b),
"smull", " $ldst, $hdst, $a, $b", []>;
@ -967,6 +969,7 @@ def UMAAL : AMul1I <0b0000010, (outs GPR:$ldst, GPR:$hdst),
(ins GPR:$a, GPR:$b),
"umaal", " $ldst, $hdst, $a, $b", []>,
Requires<[IsARM, HasV6]>;
} // neverHasSideEffects
// Most significant word multiply
def SMMUL : AMul2I <0b0111010, (outs GPR:$dst), (ins GPR:$a, GPR:$b),

3
lib/Target/ARM/ARMInstrThumb.td
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@ -298,6 +298,7 @@ def tADDrr : TI<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs),
"add $dst, $lhs, $rhs",
[(set tGPR:$dst, (add tGPR:$lhs, tGPR:$rhs))]>;
let neverHasSideEffects = 1 in
def tADDhirr : TIt<(outs tGPR:$dst), (ins GPR:$lhs, GPR:$rhs),
"add $dst, $rhs @ addhirr", []>;
@ -387,6 +388,7 @@ def tMOVi8 : TI<(outs tGPR:$dst), (ins i32imm:$src),
// Note: MOV(2) of two low regs updates the flags, so we emit this as 'cpy',
// which is MOV(3). This also supports high registers.
let neverHasSideEffects = 1 in {
def tMOVr : TI<(outs tGPR:$dst), (ins tGPR:$src),
"cpy $dst, $src", []>;
def tMOVhir2lor : TI<(outs tGPR:$dst), (ins GPR:$src),
@ -395,6 +397,7 @@ def tMOVlor2hir : TI<(outs GPR:$dst), (ins tGPR:$src),
"cpy $dst, $src\t@ lor2hir", []>;
def tMOVhir2hir : TI<(outs GPR:$dst), (ins GPR:$src),
"cpy $dst, $src\t@ hir2hir", []>;
} // neverHasSideEffects
def tMUL : TIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs),
"mul $dst, $rhs",

2
lib/Target/ARM/ARMInstrVFP.td
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@ -192,11 +192,13 @@ def FCVTSD : AI<(outs SPR:$dst), (ins DPR:$a), VFPUnaryFrm,
let Inst{7-4} = 0b1100;
}
let neverHasSideEffects = 1 in {
def FCPYD : ADuI<0b11101011, 0b0000, 0b0100, (outs DPR:$dst), (ins DPR:$a),
"fcpyd", " $dst, $a", []>;
def FCPYS : ASuI<0b11101011, 0b0000, 0b0100, (outs SPR:$dst), (ins SPR:$a),
"fcpys", " $dst, $a", []>;
} // neverHasSideEffects
def FNEGD : ADuI<0b11101011, 0b0001, 0b0100, (outs DPR:$dst), (ins DPR:$a),
"fnegd", " $dst, $a",

2
test/CodeGen/ARM/lsr-code-insertion.ll
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@ -1,4 +1,4 @@
; RUN: llvm-as < %s | llc -stats |& grep {40.*Number of machine instrs printed}
; RUN: llvm-as < %s | llc -stats |& grep {39.*Number of machine instrs printed}
; RUN: llvm-as < %s | llc -stats |& grep {.*Number of re-materialization}
; This test really wants to check that the resultant "cond_true" block only
; has a single store in it, and that cond_true55 only has code to materialize