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reg-stack.c (subst_stack_regs_pat): Make sure the top of stack is the destination for conditional move insn.

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* reg-stack.c (subst_stack_regs_pat): Make sure the top of
        stack is the destination for conditional move insn.

From-SVN: r20324
This commit is contained in:
H.J. Lu 1998-06-08 01:53:56 +00:00 committed by Jeff Law
parent 52267fcbd1
commit 49fa02d9d6
2 changed files with 14 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Mon Jun 8 02:49:23 1998 H.J. Lu (hjl@gnu.org)
* reg-stack.c (subst_stack_regs_pat): Make sure the top of
stack is the destination for conditional move insn.
Mon Jun 8 01:21:13 1998 Jason Merrill <jason@yorick.cygnus.com>
* tree.h (TREE_VEC_END): Cast unused value to void.

9
gcc/reg-stack.c
View File

@ -2344,6 +2344,15 @@ subst_stack_regs_pat (insn, regstack, pat)
case IF_THEN_ELSE:
/* This insn requires the top of stack to be the destination. */
/* If the comparison operator is an FP comparison operator,
it is handled correctly by compare_for_stack_reg () who
will move the destination to the top of stack. But if the
comparison operator is not an FP comparison operator, we
have to handle it here. */
if (get_hard_regnum (regstack, *dest) >= FIRST_STACK_REG
&& REGNO (*dest) != regstack->reg[regstack->top])
emit_swap_insn (insn, regstack, *dest);
src1 = get_true_reg (&XEXP (SET_SRC (pat), 1));
src2 = get_true_reg (&XEXP (SET_SRC (pat), 2));