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i386.md (SI_REG, DI_REG): New constants.

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* config/i386/i386.md (SI_REG, DI_REG): New constants.
	(strmov): Use defined constants.
	(cmpstrnsi): Likewise.
	* config/i386/i386.c (decide_alg): Use defined constants.
	(ix86_expand_strlen): Likewise.

From-SVN: r129276
This commit is contained in:
Nathan Froyd 2007-10-12 21:21:28 +00:00 committed by Nathan Froyd
parent a9a81e7d6a
commit 8ec12e3559
3 changed files with 15 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2007-10-12 Nathan Froyd <froydnj@codesourcery.com>
* config/i386/i386.md (SI_REG, DI_REG): New constants.
(strmov): Use defined constants.
(cmpstrnsi): Likewise.
* config/i386/i386.c (decide_alg): Use defined constants.
(ix86_expand_strlen): Likewise.
2007-10-12 Richard Sandiford <rsandifo@nildram.co.uk>
* dse.c (find_shift_sequence): Reinstate "<= UNITS_PER_WORD" condition.

6
gcc/config/i386/i386.c
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@ -15060,8 +15060,8 @@ decide_alg (HOST_WIDE_INT count, HOST_WIDE_INT expected_size, bool memset,
additionally, memset wants eax and memcpy wants esi. Don't
consider such algorithms if the user has appropriated those
registers for their own purposes. */
bool rep_prefix_usable = !(global_regs[2] || global_regs[5]
|| (memset ? global_regs[0] : global_regs[4]));
bool rep_prefix_usable = !(global_regs[CX_REG] || global_regs[DI_REG]
|| (memset ? global_regs[AX_REG] : global_regs[SI_REG]));
#define ALG_USABLE_P(alg) (rep_prefix_usable \
|| (alg != rep_prefix_1_byte \
@ -16022,7 +16022,7 @@ ix86_expand_strlen (rtx out, rtx src, rtx eoschar, rtx align)
rtx unspec;
/* Can't use this if the user has appropriated eax, ecx, or edi. */
if (global_regs[0] || global_regs[2] || global_regs[5])
if (global_regs[AX_REG] || global_regs[CX_REG] || global_regs[DI_REG])
return false;
scratch2 = gen_reg_rtx (Pmode);

6
gcc/config/i386/i386.md
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@ -222,6 +222,8 @@
[(AX_REG 0)
(DX_REG 1)
(CX_REG 2)
(SI_REG 4)
(DI_REG 5)
(BP_REG 6)
(SP_REG 7)
(FLAGS_REG 17)
@ -18704,7 +18706,7 @@
/* Can't use this if the user has appropriated esi or edi. */
if ((TARGET_SINGLE_STRINGOP || optimize_size)
&& !(global_regs[4] || global_regs[5]))
&& !(global_regs[SI_REG] || global_regs[DI_REG]))
{
emit_insn (gen_strmov_singleop (operands[0], operands[1],
operands[2], operands[3],
@ -19190,7 +19192,7 @@
rtx addr1, addr2, out, outlow, count, countreg, align;
/* Can't use this if the user has appropriated esi or edi. */
if (global_regs[4] || global_regs[5])
if (global_regs[SI_REG] || global_regs[DI_REG])
FAIL;
out = operands[0];