r120526 - in /branches/gcc-4_1-branch/gcc: Chan...

[rsandifo at gcc dot gnu dot org]

Author: rsandifo
Date: Sat Jan  6 14:26:58 2007
New Revision: 120526

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=120526
Log:
gcc/
	Backport:

	2006-05-23  Richard Sandiford  <richard@codesourcery.com>

	PR rtl-optimization/27736
	* combine.c (replaced_rhs_value): New variable.
	(combine_instructions): Set it.
	(distribute_notes): When distributing a note in replaced_rhs_insn,
	check whether the value was used in replaced_rhs_value.

	2006-05-22  Richard Sandiford  <richard@codesourcery.com>

	PR rtl-optimization/25514
	* combine.c (replaced_rhs_insn): New variable.
	(combine_instructions): Set replaced_rhs_insn when trying to replace
	a SET_SRC with a REG_EQUAL note.
	(distribute_notes): Use replaced_rhs_insn when determining the live
	range of a REG_DEAD register.

gcc/testsuite/
	2006-05-22  Richard Sandiford  <richard@codesourcery.com>

	PR rtl-optimization/25514
	* gcc.c-torture/compile/pr25514.c: New test.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.c-torture/compile/pr25514.c
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/combine.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog