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| author | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-12-16 02:22:59 +0000 |
|---|---|---|
| committer | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-12-16 02:22:59 +0000 |
| commit | 5c8ef8c3944ede38b7b4bfa36c9c2697c050d999 (patch) | |
| tree | b02900d53cb5f257d74a47dcc26cadd3b2198c39 /gcc/testsuite | |
| parent | d3d36188118a268c29a07839aced0771853130a7 (diff) | |
| download | ppe42-gcc-5c8ef8c3944ede38b7b4bfa36c9c2697c050d999.tar.gz ppe42-gcc-5c8ef8c3944ede38b7b4bfa36c9c2697c050d999.zip | |
PR middle-end/13400
* ifcvt.c (noce_process_if_block): Disable unconditional write
optimizations if we could introduce a store to trapping memory
that wasn't present previously.
* gcc.c-torture/execute/20031215-1.c: New test case.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@74663 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/testsuite')
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/20031215-1.c | 38 |
2 files changed, 43 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 8862f109ff2..96c0ee8a93e 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2003-12-15 Roger Sayle <roger@eyesopen.com> + + PR middle-end/13400 + * gcc.c-torture/execute/20031215-1.c: New test case. + 2003-12-15 Mark Mitchell <mark@codesourcery.com> PR c++/13269 diff --git a/gcc/testsuite/gcc.c-torture/execute/20031215-1.c b/gcc/testsuite/gcc.c-torture/execute/20031215-1.c new file mode 100644 index 00000000000..d62177b2618 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/20031215-1.c @@ -0,0 +1,38 @@ +/* PR middle-end/13400 */ +/* The following test used to fail at run-time with a write to read-only + memory, caused by if-conversion converting a conditional write into an + unconditional write. */ + +typedef struct {int c, l; char ch[3];} pstr; +const pstr ao = {2, 2, "OK"}; +const pstr * const a = &ao; + +void test1(void) +{ + if (a->ch[a->l]) { + ((char *)a->ch)[a->l] = 0; + } +} + +void test2(void) +{ + if (a->ch[a->l]) { + ((char *)a->ch)[a->l] = -1; + } +} + +void test3(void) +{ + if (a->ch[a->l]) { + ((char *)a->ch)[a->l] = 1; + } +} + +int main(void) +{ + test1(); + test2(); + test3(); + return 0; +} + |
