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backport http://gcc.gnu.org/viewcvs?view=revision&revision=162404
from trunk
Which fixes http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43698
2010-07-22 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
PR target/43698
* config/arm/arm.md: Split arm_rev into *arm_rev
and *thumb1_rev. Set *arm_rev to be predicable.
2010-07-22 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
PR target/43698
* gcc.target/arm/pr43698.c: New test.
/scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
Usage: date [OPTION]... [+FORMAT]
Display the current time in the given FORMAT.
-d, --date=STRING display time described by STRING, not `now'
-f, --file=DATEFILE like --date once for each line of DATEFILE
-R, --rfc-822 output RFC-822 compliant date string
-u, --utc, --universal print or set Coordinated Universal Time
--help display this help and exit
date is /scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
date is /scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
date is /bin/date
date is /scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
date is /scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
date is /bin/date
date is /scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
date is /scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
date is /bin/date
date is /scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
date is /scratch/oe/sysroots/i686-linux/usr/share/quilt/compat/date
date is /bin/date
date
Khem
Index: gcc-4.5/gcc/config/arm/arm.md
===================================================================
--- gcc-4.5.orig/gcc/config/arm/arm.md 2010-07-20 20:31:25.000000000 -0700
+++ gcc-4.5/gcc/config/arm/arm.md 2010-07-22 14:55:54.303169081 -0700
@@ -11197,15 +11197,21 @@
(set_attr "length" "4")]
)
-(define_insn "arm_rev"
+(define_insn "*arm_rev"
[(set (match_operand:SI 0 "s_register_operand" "=r")
(bswap:SI (match_operand:SI 1 "s_register_operand" "r")))]
- "TARGET_EITHER && arm_arch6"
- "rev\t%0, %1"
- [(set (attr "length")
- (if_then_else (eq_attr "is_thumb" "yes")
- (const_int 2)
- (const_int 4)))]
+ "TARGET_32BIT && arm_arch6"
+ "rev%?\t%0, %1"
+ [(set_attr "predicable" "yes")
+ (set_attr "length" "4")]
+)
+
+(define_insn "*thumb1_rev"
+ [(set (match_operand:SI 0 "s_register_operand" "=l")
+ (bswap:SI (match_operand:SI 1 "s_register_operand" "l")))]
+ "TARGET_THUMB1 && arm_arch6"
+ "rev\t%0, %1"
+ [(set_attr "length" "2")]
)
(define_expand "arm_legacy_rev"
Index: gcc-4.5/gcc/testsuite/gcc.target/arm/pr43698.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ gcc-4.5/gcc/testsuite/gcc.target/arm/pr43698.c 2010-07-22 14:56:35.406670213 -0700
@@ -0,0 +1,39 @@
+/* { dg-do run } */
+/* { dg-options "-Os -march=armv7-a" } */
+#include <stdint.h>
+#include <stdlib.h>
+
+
+char do_reverse_endian = 0;
+
+# define bswap_32(x) \
+ ((((x) & 0xff000000) >> 24) | \
+ (((x) & 0x00ff0000) >> 8) | \
+ (((x) & 0x0000ff00) << 8) | \
+ (((x) & 0x000000ff) << 24))
+
+#define EGET(X) \
+ (__extension__ ({ \
+ uint64_t __res; \
+ if (!do_reverse_endian) { __res = (X); \
+ } else if (sizeof(X) == 4) { __res = bswap_32((X)); \
+ } \
+ __res; \
+ }))
+
+void __attribute__((noinline)) X(char **phdr, char **data, int *phoff)
+{
+ *phdr = *data + EGET(*phoff);
+}
+
+int main()
+{
+ char *phdr;
+ char *data = (char *)0x40164000;
+ int phoff = 0x34;
+ X(&phdr, &data, &phoff);
+ if (phdr != (char *)0x40164034)
+ abort ();
+ exit (0);
+}
+
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