* gcse.c (insert_insn_end_bb): Do not search for assignments to

        non-argumment registers that are mentioned in CALL_INSN_FUNCTION_USAGE.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@41976 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d5acce9..5c73642 100644 (file)
--- 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 07bdbf5..fa8ec08 100644 (file)
--- 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++;
          }