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simplify-rtx.c (simplify_relational_operation): Canonicalize constant to op1 for testing.

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* simplify-rtx.c (simplify_relational_operation): Canonicalize
        constant to op1 for testing.

From-SVN: r31825
This commit is contained in:
Richard Henderson 2000-02-06 02:56:56 -08:00
parent b027470f42
commit 52a75c3c22
2 changed files with 21 additions and 8 deletions
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21
gcc/ChangeLog
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@ -1,3 +1,8 @@
2000-02-06 Richard Henderson <rth@cygnus.com>
* simplify-rtx.c (simplify_relational_operation): Canonicalize
constant to op1 for testing.
2000-02-06 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.md (*ldi_on_overflow): New pattern.
@ -171,20 +176,20 @@
2000-02-04 Jan Hubicka <jh@suse.cz>
Richard Henderson <rth@cygnus.com>
* i386.c (SAVE_REGS_FIRST): Remove.
(ix86_initial_elimination_offset): Handle only SAVE_REGS_FIRST mode.
(ix86_compute_frame_size): Likewise.
* i386.c (SAVE_REGS_FIRST): Remove.
(ix86_initial_elimination_offset): Handle only SAVE_REGS_FIRST mode.
(ix86_compute_frame_size): Likewise.
(ix86_expand_prologue): Likewise. Use pro_epilogue_adjust_stack.
(ix86_emit_restore_regs): Remove.
(ix86_emit_restore_regs): Remove.
(ix86_emit_epilogue_esp_adjustment): Use pro_epilogue_adjust_stack
when a frame pointer is in use.
(ix86_expand_epilogue): Handle only SAVE_REGS_FIRST mode. Use mov
(ix86_expand_epilogue): Handle only SAVE_REGS_FIRST mode. Use mov
instead of pop to restore a register when profitable; emit leave
when profitable.
(ix86_attr_length_default): Handle pro_epilogue_adjust_stack
as a TYPE_LEA insn.
(ix86_attr_length_default): Handle pro_epilogue_adjust_stack
as a TYPE_LEA insn.
(ix86_adjust_cost): Handle pro_epilogue_adjust_stack as TYPE_ALU.
* i386.md (prologue_allocate_stack): Remove.
* i386.md (prologue_allocate_stack): Remove.
(epilogue_deallocate_stack): Remove.
(pro_epilogue_adjust_stack): New.

8
gcc/simplify-rtx.c
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@ -1591,6 +1591,14 @@ simplify_relational_operation (code, mode, op0, op1)
)
return 0;
/* Make sure the constant is second. */
if ((CONSTANT_P (op0) && ! CONSTANT_P (op1))
|| (GET_CODE (op0) == CONST_INT && GET_CODE (op1) != CONST_INT))
{
tem = op0, op0 = op1, op1 = tem;
code = swap_condition (code);
}
/* For integer comparisons of A and B maybe we can simplify A - B and can
then simplify a comparison of that with zero. If A and B are both either
a register or a CONST_INT, this can't help; testing for these cases will