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Revert "i386: Simplify PARALLEL RTX scan in ix86_find_all_reg_use"

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This reverts commit 565d4e7554.
This commit is contained in:
H.J. Lu 2025-02-20 15:23:05 +08:00
parent 49bc1cf6c6
commit 0312d11be3
1 changed files with 25 additions and 3 deletions
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28
gcc/config/i386/i386.cc
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@ -8538,9 +8538,31 @@ ix86_find_all_reg_use (HARD_REG_SET &stack_slot_access,
for (int i = 0; i < XVECLEN (pat, 0); i++)
{
rtx exp = XVECEXP (pat, 0, i);
if (GET_CODE (exp) == SET)
ix86_find_all_reg_use_1 (exp, stack_slot_access, worklist);
switch (GET_CODE (exp))
{
case ASM_OPERANDS:
case CLOBBER:
case PREFETCH:
case USE:
break;
case UNSPEC:
case UNSPEC_VOLATILE:
for (int j = XVECLEN (exp, 0) - 1; j >= 0; j--)
{
rtx x = XVECEXP (exp, 0, j);
if (GET_CODE (x) == SET)
ix86_find_all_reg_use_1 (x, stack_slot_access,
worklist);
}
break;
case SET:
ix86_find_all_reg_use_1 (exp, stack_slot_access,
worklist);
break;
default:
gcc_unreachable ();
break;
}
}
}
}