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Add more FOLD rules for integer conversions.

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Thanks to Peter Cawley. #1246
This commit is contained in:
Mike Pall 2024-08-15 00:20:54 +02:00
parent 833600390c
commit 2d54213e7c
1 changed files with 5 additions and 4 deletions
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9
src/lj_opt_fold.c
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@ -1135,7 +1135,7 @@ LJFOLDF(shortcut_conv_num_int)
} }
LJFOLD(CONV CONV IRCONV_INT_NUM) /* _INT */ LJFOLD(CONV CONV IRCONV_INT_NUM) /* _INT */
LJFOLD(CONV CONV IRCONV_U32_NUM) /* _U32*/ LJFOLD(CONV CONV IRCONV_U32_NUM) /* _U32 */
LJFOLDF(simplify_conv_int_num) LJFOLDF(simplify_conv_int_num)
{ {
/* Fold even across PHI to avoid expensive num->int conversions in loop. */ /* Fold even across PHI to avoid expensive num->int conversions in loop. */
@ -1170,8 +1170,10 @@ LJFOLDF(simplify_conv_i64_num)
LJFOLD(CONV CONV IRCONV_INT_I64) /* _INT or _U32 */ LJFOLD(CONV CONV IRCONV_INT_I64) /* _INT or _U32 */
LJFOLD(CONV CONV IRCONV_INT_U64) /* _INT or _U32 */ LJFOLD(CONV CONV IRCONV_INT_U64) /* _INT or _U32 */
LJFOLD(CONV CONV IRCONV_INT_U32) /* _INT or _U32 */
LJFOLD(CONV CONV IRCONV_U32_I64) /* _INT or _U32 */ LJFOLD(CONV CONV IRCONV_U32_I64) /* _INT or _U32 */
LJFOLD(CONV CONV IRCONV_U32_U64) /* _INT or _U32 */ LJFOLD(CONV CONV IRCONV_U32_U64) /* _INT or _U32 */
LJFOLD(CONV CONV IRCONV_U32_INT) /* _INT or _U32 */
LJFOLDF(simplify_conv_int_i64) LJFOLDF(simplify_conv_int_i64)
{ {
int src; int src;
@ -1216,14 +1218,13 @@ LJFOLDF(simplify_tobit_conv)
return NEXTFOLD; return NEXTFOLD;
} }
/* Shortcut floor/ceil/round + IRT_NUM <- IRT_INT/IRT_U32 conversion. */ /* Shortcut floor/ceil/trunc + IRT_NUM <- integer conversion. */
LJFOLD(FPMATH CONV IRFPM_FLOOR) LJFOLD(FPMATH CONV IRFPM_FLOOR)
LJFOLD(FPMATH CONV IRFPM_CEIL) LJFOLD(FPMATH CONV IRFPM_CEIL)
LJFOLD(FPMATH CONV IRFPM_TRUNC) LJFOLD(FPMATH CONV IRFPM_TRUNC)
LJFOLDF(simplify_floor_conv) LJFOLDF(simplify_floor_conv)
{ {
if ((fleft->op2 & IRCONV_SRCMASK) == IRT_INT || if ((uint32_t)(fleft->op2 & IRCONV_SRCMASK) - (uint32_t)IRT_I8 <= (uint32_t)(IRT_U64 - IRT_U8))
(fleft->op2 & IRCONV_SRCMASK) == IRT_U32)
return LEFTFOLD; return LEFTFOLD;
return NEXTFOLD; return NEXTFOLD;
} }