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Commit d8086cbb by Roger Sayle Committed by Richard Henderson
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re PR rtl-optimization/3640 (small lost optimization of "x==0 || x==1") 

        PR opt/3640
        * fold-const.c (fold): Optimize unsigned comparisons against
        UINT_MAX (and similar unsigned constants).

From-SVN: r49096
parent 11303d15
Showing with 89 additions and 57 deletions
gcc/ChangeLog
2002-01-22 Roger Sayle <roger@eyesopen.com>
Richard Henderson <rth@redhat.com>
PR opt/3640
* fold-const.c (fold): Optimize unsigned comparisons against
UINT_MAX (and similar unsigned constants).
2002-01-22 Janis Johnson <janis187@us.ibm.com>
* Makefile.in (loop.o): Depend on OPTABS_H.
* loop.c (expand_builtin_prefetch): Check the prefetch operand
against the predicate.
* Makefile.in (loop.o): Depend on OPTABS_H.
* loop.c (expand_builtin_prefetch): Check the prefetch operand
against the predicate.
PR target/5379
* config/i386/i386.md (prefetch_sse): Specify "p" as a constraint
......@@ -25,18 +32,18 @@
2002-01-22 Aldy Hernandez <aldyh@redhat.com>
* regrename.c (kill_value): Fix typo.
* regrename.c (kill_value): Fix typo.
2002-01-22 Aldy Hernandez <aldyh@redhat.com>
* doc/tm.texi: Remove STARTING_FRAME_PHASE.
* doc/tm.texi: Remove STARTING_FRAME_PHASE.
* config/rs6000/rs6000.h: Same.
* config/rs6000/rs6000.h: Same.
* function.c (instantiate_virtual_regs): Remove
STARTING_FRAME_PHASE.
(assign_stack_local_1): Same.
Calculate frame phase.
* function.c (instantiate_virtual_regs): Remove
STARTING_FRAME_PHASE.
(assign_stack_local_1): Same.
Calculate frame phase.
2002-01-22 Nick Clifton <nickc@redhat.com>
......@@ -276,15 +283,15 @@ Sun Jan 20 18:40:14 2002 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
2002-01-18 Aldy Hernandez <aldyh@redhat.com>
* doc/tm.texi (STARTING_FRAME_PHASE): Document.
* doc/tm.texi (STARTING_FRAME_PHASE): Document.
* function.c (assign_stack_local_1): Adjust x_frame_offset with
STARTING_FRAME_PHASE.
(STARTING_FRAME_PHASE): New.
(instantiate_virtual_regs): Check saneness of
STARTING_FRAME_PHASE.
* function.c (assign_stack_local_1): Adjust x_frame_offset with
STARTING_FRAME_PHASE.
(STARTING_FRAME_PHASE): New.
(instantiate_virtual_regs): Check saneness of
STARTING_FRAME_PHASE.
* config/rs6000/rs6000.h (STARTING_FRAME_PHASE): New.
* config/rs6000/rs6000.h (STARTING_FRAME_PHASE): New.
2002-01-19 Alexandre Oliva <aoliva@redhat.com>
......@@ -327,11 +334,11 @@ Thu Jan 17 15:28:26 2002 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
2002-01-17 Aldy Hernandez <aldyh@redhat.com>
* config.gcc (cpu_type): Include altivec.h in powerpc
extra_headers.
Same for darwin.
* config.gcc (cpu_type): Include altivec.h in powerpc
extra_headers.
Same for darwin.
* config/rs6000/altivec.h: New.
* config/rs6000/altivec.h: New.
2002-01-17 David Edelsohn <edelsohn@gnu.org>
......@@ -409,7 +416,7 @@ Thu Jan 17 15:28:26 2002 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
2002-01-16 Jakub Jelinek <jakub@redhat.com>
PR target/5309:
* config/sparc/sparc.c (ultrasparc_adjust_cost): Handle TYPE_IDIV the
* config/sparc/sparc.c (ultrasparc_adjust_cost): Handle TYPE_IDIV the
same way as TYPE_IMUL.
(ultrasparc_sched_reorder): Likewise.
* config/sparc/sparc.md (type): Add comment to update
......@@ -505,27 +512,27 @@ Wed Jan 16 17:54:22 CET 2002 Jan Hubicka <jh@suse.cz>
2002-01-15 Aldy Hernandez <aldyh@redhat.com>
* config/rs6000/rs6000.md (altivec_stvx): Add parallels to stvx.
(altivec_lvsl): Change constraint to b.
(altivec_lvsr): Same.
(altivec_lvebx): Same.
(altivec_lvehx): Same.
(altivec_lvewx): Same.
(altivec_lvxl): Same.
(altivec_lvx): Same.
(altivec_stvx): Add parallel.
(altivec_stvxl): Same.
(altivec_stvehx): Same.
(altivec_stvebx): Same.
(altivec_stvebx): Same.
* config/rs6000/rs6000.md (altivec_stvx): Add parallels to stvx.
(altivec_lvsl): Change constraint to b.
(altivec_lvsr): Same.
(altivec_lvebx): Same.
(altivec_lvehx): Same.
(altivec_lvewx): Same.
(altivec_lvxl): Same.
(altivec_lvx): Same.
(altivec_stvx): Add parallel.
(altivec_stvxl): Same.
(altivec_stvehx): Same.
(altivec_stvebx): Same.
(altivec_stvebx): Same.
2002-01-15 Aldy Hernandez <aldyh@redhat.com>
* config.gcc: Change altivec.h to altivec-defs.h.
* config.gcc: Change altivec.h to altivec-defs.h.
* config/rs6000/altivec.h: Delete.
* config/rs6000/altivec.h: Delete.
* config/rs6000/altivec-defs.h: Add.
* config/rs6000/altivec-defs.h: Add.
2002-01-15 John David Anglin <dave@hiauly1.hia.nrc.ca>
......@@ -903,24 +910,24 @@ Fri Jan 11 09:25:05 2002 Nicola Pero <n.pero@mi.flashnet.it>
2002-01-10 Aldy Hernandez <aldyh@redhat.com>
* config/rs6000/rs6000.c (altivec_init_builtins): Add support for
lvebx, lvehx, lvewx, lvxl, lvx, stvx, stvebx, stvehx, stvewx,
stvxl.
(altivec_expand_builtin): Same.
(altivec_expand_stv_builtin): New.
* config/rs6000/rs6000.h (rs6000_builtins): Same.
* config/rs6000/rs6000.md ("altivec_lvebx"): New.
("altivec_lvehx"): New.
("altivec_lvewx"): New.
("altivec_lvxl"): New.
("altivec_lvx"): New.
("altivec_stvx"): New.
("altivec_stvebx"): New.
("altivec_stvehx"): New.
("altivec_stvewx"): New.
("altivec_stvxl"): New.
* config/rs6000/rs6000.c (altivec_init_builtins): Add support for
lvebx, lvehx, lvewx, lvxl, lvx, stvx, stvebx, stvehx, stvewx,
stvxl.
(altivec_expand_builtin): Same.
(altivec_expand_stv_builtin): New.
* config/rs6000/rs6000.h (rs6000_builtins): Same.
* config/rs6000/rs6000.md ("altivec_lvebx"): New.
("altivec_lvehx"): New.
("altivec_lvewx"): New.
("altivec_lvxl"): New.
("altivec_lvx"): New.
("altivec_stvx"): New.
("altivec_stvebx"): New.
("altivec_stvehx"): New.
("altivec_stvewx"): New.
("altivec_stvxl"): New.
2002-01-10 Richard Henderson <rth@redhat.com>
......
gcc/fold-const.c
/* Fold a constant sub-tree into a single node for C-compiler
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001 Free Software Foundation, Inc.
1999, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GCC.
......@@ -6753,6 +6753,31 @@ fold (expr)
default:
break;
}
else if (TREE_UNSIGNED (TREE_TYPE (arg1))
&& tree_int_cst_equal (TYPE_MAX_VALUE (TREE_TYPE (arg1)),
arg1))
switch (TREE_CODE (t))
{
case GT_EXPR:
return omit_one_operand (type,
convert (type, integer_zero_node),
arg0);
case GE_EXPR:
TREE_SET_CODE (t, EQ_EXPR);
break;
case LE_EXPR:
return omit_one_operand (type,
convert (type, integer_one_node),
arg0);
case LT_EXPR:
TREE_SET_CODE (t, NE_EXPR);
break;
default:
break;
}
}
}
......
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