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be10a6b132
This needs further investigation, but for now we can get the tested sources into the poky gcc harness Signed-off-by: Koen Kooi <k-kooi@ti.com>
77 lines
2.0 KiB
Diff
77 lines
2.0 KiB
Diff
2010-07-20 Yao Qi <yao@codesourcery.com>
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Merge from Sourcery G++ 4.4:
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2010-06-07 Kazu Hirata <kazu@codesourcery.com>
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Issue #8535
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Backport from mainline:
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gcc/
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2010-06-07 Kazu Hirata <kazu@codesourcery.com>
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PR rtl-optimization/44404
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* auto-inc-dec.c (find_inc): Use reg_overlap_mentioned_p instead
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of count_occurrences to see if it's safe to modify mem_insn.insn.
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gcc/testsuite/
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2010-06-07 Kazu Hirata <kazu@codesourcery.com>
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PR rtl-optimization/44404
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* gcc.dg/pr44404.c: New.
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2010-08-03 Chung-Lin Tang <cltang@codesourcery.com>
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Backport from mainline:
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=== modified file 'gcc/auto-inc-dec.c'
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--- old/gcc/auto-inc-dec.c 2010-04-02 18:54:46 +0000
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+++ new/gcc/auto-inc-dec.c 2010-08-05 11:30:21 +0000
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@@ -1068,7 +1068,7 @@
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/* For the post_add to work, the result_reg of the inc must not be
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used in the mem insn since this will become the new index
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register. */
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- if (count_occurrences (PATTERN (mem_insn.insn), inc_insn.reg_res, 1) != 0)
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+ if (reg_overlap_mentioned_p (inc_insn.reg_res, PATTERN (mem_insn.insn)))
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{
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if (dump_file)
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fprintf (dump_file, "base reg replacement failure.\n");
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=== added file 'gcc/testsuite/gcc.dg/pr44404.c'
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--- old/gcc/testsuite/gcc.dg/pr44404.c 1970-01-01 00:00:00 +0000
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+++ new/gcc/testsuite/gcc.dg/pr44404.c 2010-08-05 11:30:21 +0000
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@@ -0,0 +1,35 @@
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+/* PR rtl-optimization/44404
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+ foo() used to be miscompiled on ARM due to a bug in auto-inc-dec.c,
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+ which resulted in "strb r1, [r1], #-36". */
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+
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+/* { dg-do run } */
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+/* { dg-options "-O2 -fno-unroll-loops" } */
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+
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+extern char *strcpy (char *, const char *);
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+extern int strcmp (const char*, const char*);
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+extern void abort (void);
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+
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+char buf[128];
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+
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+void __attribute__((noinline))
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+bar (int a, const char *p)
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+{
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+ if (strcmp (p, "0123456789abcdefghijklmnopqrstuvwxyz") != 0)
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+ abort ();
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+}
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+
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+void __attribute__((noinline))
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+foo (int a)
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+{
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+ if (a)
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+ bar (0, buf);
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+ strcpy (buf, "0123456789abcdefghijklmnopqrstuvwxyz");
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+ bar (0, buf);
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+}
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+
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+int
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+main (void)
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+{
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+ foo (0);
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+ return 0;
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+}
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