diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.target/s390/20040305-1.c')
-rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.target/s390/20040305-1.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.target/s390/20040305-1.c b/gcc-4.9/gcc/testsuite/gcc.target/s390/20040305-1.c new file mode 100644 index 000000000..a241f041c --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.target/s390/20040305-1.c @@ -0,0 +1,53 @@ + +/* The testcase failed due to corrupted alias information. + During the crossjump analyzing step the mem alias info of the + st instructions are merged and get copied during basic block + reordering which leads to an insn with wrong alias info. + The scheduler afterwards exchanges the mvc and st instructions + not recognizing the anti dependence. */ +/* { dg-do run } */ +/* { dg-options "-O3 -mtune=z990 -fno-inline" } */ + +extern void exit (int); +extern void abort (void); + +int f; +int g; +int h; + +int* x = &f; +int* p1 = &g; +int* p2 = &h; + +int +foo(void) +{ + + if (*x == 0) + { + x = p1; /* mvc - memory to memory */ + p1 = (int*)0; /* st - register to memory */ + return 1; + } + if (*x == 5) + { + f = 1; + g = 2; + + p2 = (int*)0; /* st */ + return 1; + } +} + +int +main (int argc, char** argv) +{ + foo (); + + /* If the scheduler has exchanged the mvc and st instructions, + x is 0. The expected result is &g. */ + if (x == &g) + exit (0); + else + abort (); +} |