From: Richard Henderson <rth@cygnus.com>
Date: Sat, 22 Apr 2000 18:47:52 +0000 (-0700)
Subject: * flow.c (mark_used_reg): Hack around rs6000 eliminable pic reg.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b2433fcde0f08059731043f5af3d1ad687a1fbba;p=gcc.git

* flow.c (mark_used_reg): Hack around rs6000 eliminable pic reg.

From-SVN: r33342
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2fcc64a8aad..7b3844a862e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2000-04-22  Richard Henderson  <rth@cygnus.com>
+
+	* flow.c (mark_used_reg): Hack around rs6000 eliminable pic reg.
+
 2000-04-22  Richard Henderson  <rth@cygnus.com>
 
 	* diagnostic.c (init_output_buffer): Don't initialize format_args.
diff --git a/gcc/flow.c b/gcc/flow.c
index 9f7537e3aea..24ae92c9b05 100644
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -4473,12 +4473,15 @@ mark_used_reg (pbi, reg, cond, insn)
 	     be eliminated, reload will set it live at that point.
 
 	     Otherwise, record that this function uses this register.  */
+	  /* ??? The PPC backend tries to "eliminate" on the pic
+	     register to itself.  This should be fixed.  In the mean
+	     time, hack around it.  */
 
-	  if (! TEST_HARD_REG_BIT (elim_reg_set, regno))
+	  if (! (TEST_HARD_REG_BIT (elim_reg_set, regno)
+	         && (regno == FRAME_POINTER_REGNUM
+		     || regno == ARG_POINTER_REGNUM)))
 	    {
 	      int n = HARD_REGNO_NREGS (regno, GET_MODE (reg));
-	      if (n == 0)
-		n = 1;
 	      do
 		regs_ever_live[regno + --n] = 1;
 	      while (n > 0);