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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [nrv5.c] - Rev 302
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/* Verify that NRV optimizations are prohibited when the LHS is something that may be call-clobbered. */ /* { dg-do compile } */ /* { dg-options "-O -fdump-tree-optimized" } */ typedef struct { int x[20]; void *y; } S; typedef struct { int a; S b; } T; S nrv_candidate (void); void use_result (S); void make_escape (S *); void foo (void) { S result; T result_arr[10][5]; make_escape (&result); make_escape (&(result_arr[3][4].b)); /* Neither call should be allowed to use NRV optimization. */ result = nrv_candidate (); result_arr[3][4].b = nrv_candidate (); use_result (result); use_result (result_arr[3][4].b); } /* { dg-final { scan-tree-dump-times "return slot optimization" 0 "optimized" } } */ /* { dg-final { cleanup-tree-dump "optimized" } } */
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