From: Richard Henderson <rth@cygnus.com>
Date: Thu, 28 Oct 1999 19:30:02 +0000 (-0700)
Subject: resource.c (find_free_register): Don't use the frame pointer if frame_pointer_needed.
X-Git-Tag: prereleases/libstdc++-2.92~9826
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=af05822029866791f4fb4a241ac5f0bc529c09cf;p=thirdparty%2Fgcc.git

resource.c (find_free_register): Don't use the frame pointer if frame_pointer_needed.

        * resource.c (find_free_register): Don't use the frame pointer
        if frame_pointer_needed.

From-SVN: r30246
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0cee76fe6e4c..5595acc33fb7 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Thu Oct 28 12:28:50 1999  Richard Henderson  <rth@cygnus.com>
+
+	* resource.c (find_free_register): Don't use the frame pointer
+	if frame_pointer_needed.
+
 Thu Oct 28 10:02:00 1999  Jim Wilson  <wilson@cygnus.com>
 
 	* config/mips/mips.c (mips_va_arg): Delete gen_jump as emit_jump arg.
diff --git a/gcc/resource.c b/gcc/resource.c
index 335b14e42c91..1dc830f933f4 100644
--- a/gcc/resource.c
+++ b/gcc/resource.c
@@ -1261,6 +1261,10 @@ find_free_register (current_insn, last_insn, class_str, mode, reg_set)
       /* And that we don't create an extra save/restore.  */
       if (! call_used_regs[regno] && ! regs_ever_live[regno])
 	continue;
+      /* And we don't clobber traceback for noreturn functions.  */
+      if ((regno == FRAME_POINTER_REGNUM || regno == HARD_FRAME_POINTER_REGNUM)
+	  && (! reload_completed || frame_pointer_needed))
+        continue;
 
       success = 1;
       for (j = HARD_REGNO_NREGS (regno, mode) - 1; j >= 0; j--)