From: Jeffrey A Law <law@cygnus.com>
Date: Fri, 11 May 2001 22:07:58 +0000 (+0000)
Subject: gcse.c (insert_insn_end_bb): Do not search for assignments to non-argumment registers... 
X-Git-Tag: prereleases/libstdc++-3.0.95~4523
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8598a9a23232f91e55d76dab9800eefe5ab319cd;p=thirdparty%2Fgcc.git

gcse.c (insert_insn_end_bb): Do not search for assignments to non-argumment registers that are mentioned in...

        * gcse.c (insert_insn_end_bb): Do not search for assignments to
        non-argumment registers that are mentioned in CALL_INSN_FUNCTION_USAGE.

From-SVN: r41976
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d5acce97fc1f..5c7364231685 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 Fri May 11 15:50:13 2001  Jeffrey A Law  (law@cygnus.com)
 
+	* gcse.c (insert_insn_end_bb): Do not search for assignments to
+	non-argumment registers that are mentioned in CALL_INSN_FUNCTION_USAGE.
+
 	* toplev.c (compile_file): Move comment for opening output
 	file to just before the code that opens the output file.
 
diff --git a/gcc/gcse.c b/gcc/gcse.c
index 07bdbf5e21df..fa8ec0896996 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -4787,6 +4787,11 @@ insert_insn_end_bb (expr, bb, pre)
 	    if (REGNO (XEXP (XEXP (p, 0), 0)) >= FIRST_PSEUDO_REGISTER)
 	      abort ();
 
+	    /* We only care about registers which can hold function
+	       arguments.  */
+	    if (! FUNCTION_ARG_REGNO_P (REGNO (XEXP (XEXP (p, 0), 0))))
+	      continue;
+
 	    SET_HARD_REG_BIT (parm_regs, REGNO (XEXP (XEXP (p, 0), 0)));
 	    nparm_regs++;
 	  }