From 41828ba0c91cdb4856a5c077e1f70d84ca80364f Mon Sep 17 00:00:00 2001
From: rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 29 Jan 2002 22:34:48 +0000
Subject: [PATCH] * expr.c (force_operand): Ignore flag_pic for
detecting pic address loads. * regclass.c (init_reg_sets_1):
Test fixed_regs not flag_pic for determining if
PIC_OFFSET_TABLE_REGNUM is call-clobbered. * resource.c
(mark_target_live_regs): Use regs_invalidated_by_call instead of
open-coded loop. * doc/tm.texi (PIC_OFFSET_TABLE_REGNUM): Clarify
that it must be fixed when in use.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@49329 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 11 +++++++++++
gcc/doc/tm.texi | 3 ++-
gcc/expr.c | 3 +--
gcc/regclass.c | 2 +-
gcc/resource.c | 17 ++---------------
5 files changed, 17 insertions(+), 19 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index cedff732fa11..6d0befa4cd82 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+2002-01-29 Richard Henderson <rth@redhat.com>
+
+ * expr.c (force_operand): Ignore flag_pic for detecting pic
+ address loads.
+ * regclass.c (init_reg_sets_1): Test fixed_regs not flag_pic
+ for determining if PIC_OFFSET_TABLE_REGNUM is call-clobbered.
+ * resource.c (mark_target_live_regs): Use regs_invalidated_by_call
+ instead of open-coded loop.
+ * doc/tm.texi (PIC_OFFSET_TABLE_REGNUM): Clarify that it must
+ be fixed when in use.
+
2002-01-29 Richard Henderson <rth@redhat.com>
* sched-int.h (struct deps_reg): Add uses_length, clobbers_length.
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index a7a7c5b73f9d..f3454f33c5c7 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -5603,7 +5603,8 @@ processor's ``application binary interface'' (ABI)@. When this macro
is defined, RTL is generated for this register once, as with the stack
pointer and frame pointer registers. If this macro is not defined, it
is up to the machine-dependent files to allocate such a register (if
-necessary).
+necessary). Note that this register must be fixed when in use (e.g.
+when @code{flag_pic} is true).
@findex PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
@item PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
diff --git a/gcc/expr.c b/gcc/expr.c
index 06914206ae7f..2b8b0856b46f 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -5393,8 +5393,7 @@ force_operand (value, target)
rtx subtarget = get_subtarget (target);
/* Check for a PIC address load. */
- if (flag_pic
- && (GET_CODE (value) == PLUS || GET_CODE (value) == MINUS)
+ if ((GET_CODE (value) == PLUS || GET_CODE (value) == MINUS)
&& XEXP (value, 0) == pic_offset_table_rtx
&& (GET_CODE (XEXP (value, 1)) == SYMBOL_REF
|| GET_CODE (XEXP (value, 1)) == LABEL_REF
diff --git a/gcc/regclass.c b/gcc/regclass.c
index 9bf07048db95..d064e240b626 100644
--- a/gcc/regclass.c
+++ b/gcc/regclass.c
@@ -470,7 +470,7 @@ init_reg_sets_1 ()
;
#endif
#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
- else if (i == PIC_OFFSET_TABLE_REGNUM && flag_pic)
+ else if (i == PIC_OFFSET_TABLE_REGNUM && fixed_regs[i])
;
#endif
else if (0
diff --git a/gcc/resource.c b/gcc/resource.c
index ebff8c618874..5b19fe45450c 100644
--- a/gcc/resource.c
+++ b/gcc/resource.c
@@ -1023,21 +1023,8 @@ mark_target_live_regs (insns, target, res)
/* CALL clobbers all call-used regs that aren't fixed except
sp, ap, and fp. Do this before setting the result of the
call live. */
- for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- if (call_used_regs[i]
- && i != STACK_POINTER_REGNUM && i != FRAME_POINTER_REGNUM
- && i != ARG_POINTER_REGNUM
-#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM
- && i != HARD_FRAME_POINTER_REGNUM
-#endif
-#if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM
- && ! (i == ARG_POINTER_REGNUM && fixed_regs[i])
-#endif
-#if !defined (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED)
- && ! (i == PIC_OFFSET_TABLE_REGNUM && flag_pic)
-#endif
- )
- CLEAR_HARD_REG_BIT (current_live_regs, i);
+ AND_COMPL_HARD_REG_SET (current_live_regs,
+ regs_invalidated_by_call);
/* A CALL_INSN sets any global register live, since it may
have been modified by the call. */
--
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