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ARM64: Simplify code generation for IR_STRTO.

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Thanks to Peter Cawley. #1070
This commit is contained in:
Mike Pall 2023-09-09 17:34:28 +02:00
parent a5ee35867c
commit 4ed83bd990
1 changed files with 4 additions and 7 deletions
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11
src/lj_asm_arm64.h
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@ -664,25 +664,22 @@ static void asm_strto(ASMState *as, IRIns *ir)
{ {
const CCallInfo *ci = &lj_ir_callinfo[IRCALL_lj_strscan_num]; const CCallInfo *ci = &lj_ir_callinfo[IRCALL_lj_strscan_num];
IRRef args[2]; IRRef args[2];
Reg dest = 0, tmp; Reg tmp;
int destused = ra_used(ir);
int32_t ofs = 0; int32_t ofs = 0;
ra_evictset(as, RSET_SCRATCH); ra_evictset(as, RSET_SCRATCH);
if (destused) { if (ra_used(ir)) {
if (ra_hasspill(ir->s)) { if (ra_hasspill(ir->s)) {
ofs = sps_scale(ir->s); ofs = sps_scale(ir->s);
destused = 0;
if (ra_hasreg(ir->r)) { if (ra_hasreg(ir->r)) {
ra_free(as, ir->r); ra_free(as, ir->r);
ra_modified(as, ir->r); ra_modified(as, ir->r);
emit_spload(as, ir, ir->r, ofs); emit_spload(as, ir, ir->r, ofs);
} }
} else { } else {
dest = ra_dest(as, ir, RSET_FPR); Reg dest = ra_dest(as, ir, RSET_FPR);
emit_lso(as, A64I_LDRd, (dest & 31), RID_SP, 0);
} }
} }
if (destused)
emit_lso(as, A64I_LDRd, (dest & 31), RID_SP, 0);
asm_guardcnb(as, A64I_CBZ, RID_RET); asm_guardcnb(as, A64I_CBZ, RID_RET);
args[0] = ir->op1; /* GCstr *str */ args[0] = ir->op1; /* GCstr *str */
args[1] = ASMREF_TMP1; /* TValue *n */ args[1] = ASMREF_TMP1; /* TValue *n */