diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/20100906-1.c')
-rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.dg/20100906-1.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/20100906-1.c b/gcc-4.9/gcc/testsuite/gcc.dg/20100906-1.c new file mode 100644 index 000000000..042ba99c5 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/20100906-1.c @@ -0,0 +1,49 @@ +/* { dg-do run } */ +/* { dg-options "-O2" } */ +/* { dg-options "-O2 -fno-short-enums -Wl,--no-enum-size-warning" {target arm_eabi} } */ + +/* This testcase got misoptimized by combine due to a wrong setting of + subst_low_luid in try_combine. */ + +enum rtx_code { + A, B +}; + +void abort (void); + +struct rtx_def { + __extension__ enum rtx_code code:16; +}; +typedef struct rtx_def *rtx; + +void __attribute__((noinline)) +add_constraint (unsigned char is_a) +{ + if (is_a) + abort (); +} + +void __attribute__((noinline)) +foo (rtx defn) +{ + switch (defn->code) + { + case A: + case B: + add_constraint (defn->code == A); + break; + default: + break; + } +} + +int +main () +{ + struct rtx_def r; + + r.code = B; + + foo (&r); + return 0; +} |