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-rw-r--r--gcc/ChangeLog3
-rw-r--r--gcc/gcse.c5
2 files changed, 8 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d5acce9..5c73642 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 07bdbf5..fa8ec08 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++;
}