[Bug rtl-optimization/18992] delete_trivially_dead_insns made ineffective for two-address targets

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-28 11:56 -------
Subject: Bug 18992

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	amylaar@gcc.gnu.org	2005-07-28 11:55:58

Modified files:
	gcc            : ChangeLog cse.c 

Log message:
	PR rtl-optimization/18992
	Back out this patch:
	2003-10-08  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
	PR optimization/12142
	* cse.c (count_reg_usage): In a SET with a REG SET_DEST, count the
	uses of the register in the SET_SRC.  Remove unnecessary argument.
	
	Replace it with this:
	* cse.c (count_reg_usage): In INSN, JUMP_INSN and CALL_INSN cases,
	if flag_non_call_exceptions is set and the insn may trap, pass
	pc_rtx as dest for recursion.
	In SET_SRC part of SET case, if dest is already set, pass it down
	unchanged.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9579&r2=2.9580
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cse.c.diff?cvsroot=gcc&r1=1.357&r2=1.358



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18992