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re PR target/55929 (lra-constraints-ICE while xg++ compile libitm with -Os)

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PR target/55929
	* config/i386/i386.md (xbegin): Use %eax as a temporary register.

From-SVN: r195094
This commit is contained in:
Uros Bizjak 2013-01-10 20:49:17 +01:00
parent 7f5f8bbfdd
commit ddf9322dcd
2 changed files with 10 additions and 7 deletions
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6
gcc/ChangeLog
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@ -5,8 +5,7 @@
2013-01-10 Richard Biener <rguenther@suse.de>
* builtins.c (expand_builtin_init_trampoline): Use
set_mem_attributes.
* builtins.c (expand_builtin_init_trampoline): Use set_mem_attributes.
2013-01-10 Richard Biener <rguenther@suse.de>
@ -51,7 +50,8 @@
2013-01-09 Jan Hubicka <jh@suse.cz>
PR lto/45375
* ipa-inline.c (ipa_inline): Remove extern inlines and virtual functions.
* ipa-inline.c (ipa_inline): Remove extern inlines and virtual
functions.
* cgraphclones.c (cgraph_clone_node): Cpoy also LTO file data.
2013-01-09 Richard Sandiford <rdsandiford@googlemail.com>

11
gcc/config/i386/i386.md
View File

@ -18013,19 +18013,22 @@
(define_expand "xbegin"
[(set (match_operand:SI 0 "register_operand")
(unspec_volatile:SI [(match_dup 1)] UNSPECV_XBEGIN))]
(unspec_volatile:SI [(const_int 0)] UNSPECV_XBEGIN))]
"TARGET_RTM"
{
rtx label = gen_label_rtx ();
operands[1] = force_reg (SImode, constm1_rtx);
/* xbegin is emitted as jump_insn, so reload won't be able
to reload its operand. Force the value into AX hard register. */
rtx ax_reg = gen_rtx_REG (SImode, AX_REG);
emit_move_insn (ax_reg, constm1_rtx);
emit_jump_insn (gen_xbegin_1 (operands[1], label));
emit_jump_insn (gen_xbegin_1 (ax_reg, label));
emit_label (label);
LABEL_NUSES (label) = 1;
emit_move_insn (operands[0], operands[1]);
emit_move_insn (operands[0], ax_reg);
DONE;
})