From 0ca5fbc0cacad02f25e24d7736f20571554199ed Mon Sep 17 00:00:00 2001
From: Roger Sayle <roger@eyesopen.com>
Date: Sun, 2 Jan 2005 00:15:01 +0000
Subject: [PATCH] re PR rtl-optimization/12092 (ICE: Floating point exception)
PR rtl-optimization/12092
* loop.c (emit_prefetch_instructions): Do nothing if PREFETCH_BLOCK
is zero.
* gcc.dg/pr12092-1.c: New test case.
Co-Authored-By: Andrew Pinski <pinskia@physics.uc.edu>
Co-Authored-By: James E Wilson <wilson@specifixinc.com>
From-SVN: r92794
---
gcc/ChangeLog | 8 ++++++++
gcc/loop.c | 7 ++++---
gcc/testsuite/ChangeLog | 6 ++++++
gcc/testsuite/gcc.dg/pr12092-1.c | 12 ++++++++++++
4 files changed, 30 insertions(+), 3 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/pr12092-1.c
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 503f15341341..5f5d96e559f3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2005-01-01 Roger Sayle <roger@eyesopen.com>
+ Andrew Pinski <pinskia@physics.uc.edu>
+ James E. Wilson <wilson@specifixinc.com>
+
+ PR rtl-optimization/12092
+ * loop.c (emit_prefetch_instructions): Do nothing if PREFETCH_BLOCK
+ is zero.
+
2005-01-01 Roger Sayle <roger@eyesopen.com>
Olivier Hainque <hainque@act-europe.fr>
diff --git a/gcc/loop.c b/gcc/loop.c
index faf6cb23b825..7a446eadc12d 100644
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -1,6 +1,7 @@
/* Perform various loop optimizations, including strength reduction.
- Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
This file is part of GCC.
@@ -4116,7 +4117,7 @@ emit_prefetch_instructions (struct loop *loop)
struct prefetch_info info[MAX_PREFETCHES];
struct loop_ivs *ivs = LOOP_IVS (loop);
- if (!HAVE_prefetch)
+ if (!HAVE_prefetch || PREFETCH_BLOCK == 0)
return;
/* Consider only loops w/o calls. When a call is done, the loop is probably
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 97400f7d5bc7..7d2bcc0f0b0f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2005-01-01 Roger Sayle <roger@eyesopen.com>
+ Andrew Pinski <pinskia@physics.uc.edu>
+
+ PR rtl-optimization/12092
+ * gcc.dg/pr12092-1.c: New test case.
+
2005-01-01 Geoffrey Keating <geoffk@geoffk.org>
* g++.old-deja/g++.abi/cxa_vec.C: Add -flat_namespace on Darwin
diff --git a/gcc/testsuite/gcc.dg/pr12092-1.c b/gcc/testsuite/gcc.dg/pr12092-1.c
new file mode 100644
index 000000000000..3b13c56452ce
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr12092-1.c
@@ -0,0 +1,12 @@
+/* PR rtl-optimization/12092 */
+/* Test case reduced by Andrew Pinski <pinskia@physics.uc.edu> */
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -mtune=i486 -march=pentium4 -fprefetch-loop-arrays" } */
+
+void DecodeAC(int index,int *matrix)
+{
+ int *mptr;
+
+ for(mptr=matrix+index;mptr<matrix+64;mptr++) {*mptr = 0;}
+}
+
--
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