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re PR tree-optimization/33992 (Miscompiles function with inlining, breaks profiledbootstrap)

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2008-02-11  Uros Bizjak  <ubizjak@gmail.com>
	Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/33992
	* tree-ssa-loop-im.c (rewrite_bittest): Fixup the type of
	the zero we compare against.

	* gcc.c-torture/execute/pr33992.c: New testcase.

Co-Authored-By: Richard Guenther <rguenther@suse.de>

From-SVN: r132234
This commit is contained in:
Uros Bizjak 2008-02-11 09:27:00 +01:00 committed by Richard Biener
parent 35f1ca2f84
commit a6e2d11207
4 changed files with 56 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2008-02-11 Uros Bizjak <ubizjak@gmail.com>
Richard Guenther <rguenther@suse.de>
PR tree-optimization/33992
* tree-ssa-loop-im.c (rewrite_bittest): Fixup the type of
the zero we compare against.
2008-02-09 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
PR middle_end/34150

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2008-02-11 Uros Bizjak <ubizjak@gmail.com>
Richard Guenther <rguenther@suse.de>
PR tree-optimization/33992
* gcc.c-torture/execute/pr33992.c: New testcase.
2008-02-10 Thomas Koenig <tkoenig@gcc.gnu.org>
* gfortran.dg/streamio_14.f90: New test.

38
gcc/testsuite/gcc.c-torture/execute/pr33992.c Normal file
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@ -0,0 +1,38 @@
extern void abort ();
void __attribute__((noinline))
bar (unsigned long long i)
{
if (i)
abort ();
}
void __attribute__((always_inline))
foo (unsigned long long *r)
{
int i;
for (i = 0; ; i++)
if (*r & ((unsigned long long)1 << (63 - i)))
break;
bar (i);
}
void __attribute__((noinline))
do_test (unsigned long long *r)
{
int i;
for (i = 0; i < 2; ++i)
foo (r);
}
int main()
{
unsigned long long r = 0x8000000000000001ull;
do_test (&r);
return 0;
}

5
gcc/tree-ssa-loop-im.c
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@ -685,7 +685,12 @@ rewrite_bittest (block_stmt_iterator *bsi)
stmt2 = build_gimple_modify_stmt (var, t);
name = make_ssa_name (var, stmt2);
GIMPLE_STMT_OPERAND (stmt2, 0) = name;
/* Replace the SSA_NAME we compare against zero. Adjust
the type of zero accordingly. */
SET_USE (use, name);
TREE_OPERAND (COND_EXPR_COND (use_stmt), 1)
= build_int_cst_type (TREE_TYPE (name), 0);
bsi_insert_before (bsi, stmt1, BSI_SAME_STMT);
bsi_replace (bsi, stmt2, true);