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re PR target/32406 (MIPS: FAIL in nestfunc-6.c at -O3)

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gcc/
	PR target/32406
	* builtins.c (expand_builtin_nonlocal_goto): Also emit a use
	of GP register, if valid and fixed.

	Revert:
	2007-06-21  David Daney  <ddaney@avtrex.com>

	PR target/32406
	* config/mips/mips.md (define_constants): Rename UNSPEC_EH_RECEIVER
	to UNSPEC_NONLOCAL_GOTO_RECEIVER globally.
	(exception_receiver): Renamed to ...
	(nonlocal_goto_receiver): ... this.

From-SVN: r130493
This commit is contained in:
Richard Sandiford 2007-11-28 19:46:03 +00:00 committed by Richard Sandiford
parent 36cefd3922
commit eae645b69a
3 changed files with 32 additions and 3 deletions
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15
gcc/ChangeLog
View File

@ -1,3 +1,18 @@
2007-11-28 Richard Sandiford <rsandifo@nildram.co.uk>
PR target/32406
* builtins.c (expand_builtin_nonlocal_goto): Also emit a use
of GP register, if valid and fixed.
Revert:
2007-06-21 David Daney <ddaney@avtrex.com>
PR target/32406
* config/mips/mips.md (define_constants): Rename UNSPEC_EH_RECEIVER
to UNSPEC_NONLOCAL_GOTO_RECEIVER globally.
(exception_receiver): Renamed to ...
(nonlocal_goto_receiver): ... this.
2007-11-27 H.J. Lu <hongjiu.lu@intel.com>
Joey Ye <joey.ye@intel.com>

14
gcc/builtins.c
View File

@ -909,6 +909,20 @@ expand_builtin_nonlocal_goto (tree exp)
not clear if really needed. */
emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx));
/* If the architecture is using a GP register, we must
conservatively assume that the target function makes use of it.
The prologue of functions with nonlocal gotos must therefore
initialize the GP register to the appropriate value, and we
must then make sure that this value is live at the point
of the jump. (Note that this doesn't necessarily apply
to targets with a nonlocal_goto pattern; they are free
to implement it in their own way. Note also that this is
a no-op if the GP register is a global invariant.) */
if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
&& fixed_regs[PIC_OFFSET_TABLE_REGNUM])
emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx));
emit_indirect_jump (r_label);
}

6
gcc/config/mips/mips.md
View File

@ -30,7 +30,7 @@
(UNSPEC_GET_FNADDR 3)
(UNSPEC_BLOCKAGE 4)
(UNSPEC_CPRESTORE 5)
(UNSPEC_NONLOCAL_GOTO_RECEIVER 6)
(UNSPEC_EH_RECEIVER 6)
(UNSPEC_EH_RETURN 7)
(UNSPEC_CONSTTABLE_INT 8)
(UNSPEC_CONSTTABLE_FLOAT 9)
@ -5598,9 +5598,9 @@
DONE;
})
(define_insn_and_split "nonlocal_goto_receiver"
(define_insn_and_split "exception_receiver"
[(set (reg:SI 28)
(unspec_volatile:SI [(const_int 0)] UNSPEC_NONLOCAL_GOTO_RECEIVER))]
(unspec_volatile:SI [(const_int 0)] UNSPEC_EH_RECEIVER))]
"TARGET_CALL_CLOBBERED_GP"
"#"
"&& reload_completed"