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Diffstat (limited to 'gcc/testsuite/gcc.dg/nrv3.c')
-rw-r--r-- | gcc/testsuite/gcc.dg/nrv3.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/nrv3.c b/gcc/testsuite/gcc.dg/nrv3.c new file mode 100644 index 000000000..c28b8ec57 --- /dev/null +++ b/gcc/testsuite/gcc.dg/nrv3.c @@ -0,0 +1,35 @@ +/* Verify that gimple-level NRV is occurring when values other than the + return slot are call-clobbered. */ +/* { dg-do compile } */ +/* { dg-options "-O -fdump-tree-optimized" } */ + +#ifdef __SPU__ +/* SPU returns aggregates up to 1172 bytes in registers. */ +typedef struct { int x[300]; void *y; } S; +#else +typedef struct { int x[20]; void *y; } S; +#endif +typedef struct { int a; S b; } T; +S nrv_candidate (void); +void use_result (S, int); +int *ptr; +void foo (void) +{ + S result; + T result_arr[10][5]; + + int i; + + ptr = &i; + + /* i is call-clobbered for these calls, but result and result_arr + aren't. */ + result = nrv_candidate (); + result_arr[3][4].b = nrv_candidate (); + + use_result (result, i); + use_result (result_arr[3][4].b, i); +} + +/* { dg-final { scan-tree-dump-times "return slot optimization" 2 "optimized" } } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ |