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| author | Jakub Jelinek <jakub@redhat.com> | 2012-08-20 11:12:05 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2012-08-20 11:12:05 +0200 |
| commit | 081db96050b57d83e0f82bd74c3a22cf7b93c2ed (patch) | |
| tree | ca1b85138593c09499fa1fc840dae8fc9e21b127 | |
| parent | d17fd79ca1fcad80aa66203b081aea61b758b814 (diff) | |
| download | gcc-081db96050b57d83e0f82bd74c3a22cf7b93c2ed.zip gcc-081db96050b57d83e0f82bd74c3a22cf7b93c2ed.tar.gz gcc-081db96050b57d83e0f82bd74c3a22cf7b93c2ed.tar.bz2 | |
re PR middle-end/54321 (ice in tree_low_cst at -O3)
PR tree-optimization/54321
* tree-ssa-forwprop.c (simplify_builtin_call): Pass 0 instead of 1
as second argument to tree_low_cst call on val2.
* gcc.c-torture/compile/pr54321.c: New test.
From-SVN: r190526
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr54321.c | 12 | ||||
| -rw-r--r-- | gcc/tree-ssa-forwprop.c | 2 |
4 files changed, 24 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4ecef15..04c1dfa 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2012-08-20 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/54321 + * tree-ssa-forwprop.c (simplify_builtin_call): Pass 0 instead of 1 + as second argument to tree_low_cst call on val2. + 2012-08-20 Richard Guenther <rguenther@suse.de> * gimple.h (gimple_statement_base): Annotate with GTY chain_next. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index c115e55..3ef6c94 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2012-08-20 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/54321 + * gcc.c-torture/compile/pr54321.c: New test. + 2012-08-20 Tobias Burnus <burnus@net-b.de> PR fortran/54301 diff --git a/gcc/testsuite/gcc.c-torture/compile/pr54321.c b/gcc/testsuite/gcc.c-torture/compile/pr54321.c new file mode 100644 index 0000000..13adc78 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr54321.c @@ -0,0 +1,12 @@ +/* PR tree-optimization/54321 */ +struct S { char s[0]; } *a; + +void +foo (void) +{ + char *b = a->s; + int c = 0; + b[0] = 0; + while (++c < 9) + b[c] = 255; +} diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index 78e17a5..bd9b72b 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -1554,7 +1554,7 @@ simplify_builtin_call (gimple_stmt_iterator *gsi_p, tree callee2) else src_buf[0] = tree_low_cst (src1, 0); memset (src_buf + tree_low_cst (diff, 1), - tree_low_cst (val2, 1), tree_low_cst (len2, 1)); + tree_low_cst (val2, 0), tree_low_cst (len2, 1)); src_buf[src_len] = '\0'; /* Neither builtin_strncpy_read_str nor builtin_memcpy_read_str handle embedded '\0's. */ |