Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/Wreturn-local-addr-8.c @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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/* Test to verify that a MAX_EXPR and MIN_EXPR in a return statement is handled correctly and that all local variables whose address is or may be returned are identified. { dg-do compile } { dg-options "-O2 -Wall" } */ char* sink (char*, ...); void* test_max_2 (void) { char c; /* { dg-message "declared here" } */ char *p = sink (&c); void *q = p > &c ? p : &c; /* MAX_EXPR */ return q; /* { dg-warning "\\\[-Wreturn-local-addr" } */ } void* test_max_3 (void) { char c; /* { dg-message "declared here" } */ char d; /* { dg-message "declared here" } */ char *p = sink (&c, &d); void *q = p < &c ? &c < &d ? &d : &c : p; return q; /* { dg-warning "\\\[-Wreturn-local-addr" } */ } void* test_min_2 (void) { char c; /* { dg-message "declared here" } */ char *p = sink (&c); void *q = p < &c ? p : &c; /* MIN_EXPR" */ return q; /* { dg-warning "\\\[-Wreturn-local-addr" } */ } void* test_min_3 (void) { char c; /* { dg-message "declared here" } */ char d; /* { dg-message "declared here" } */ char *p = sink (&c, &d); void *q = p > &c ? &c > &d ? &d : &c : p; return q; /* { dg-warning "\\\[-Wreturn-local-addr" } */ } void* test_min_2_phi (int i) { char a; /* { dg-message "declared here" } */ char *p = &a; char *q = sink (&a); p = p < q ? p : q; if (i == 1) return p; /* { dg-warning "may return address of local variable" "missing location" { xfail *-*-* } } */ else return q; } void* test_min_3_phi (int i) { char a; /* { dg-message "declared here" } */ char b; /* { dg-message "declared here" } */ char *p0 = &a; char *p1 = &b; char *p2 = sink (&a, &b); char *p3 = sink (&a, &b); char *p4 = p2 < p0 ? p2 : p0; char *p5 = p3 < p1 ? p3 : p1; if (i == 1) /* { dg-warning "may return address of local variable" "missing location" { xfail *-*-* } } */ return p4; else /* { dg-warning "may return address of local variable" "missing location" { xfail *-*-* } } */ return p5; } /* The directive below "swallows" warnings for both test_min_2_phi and test_min_3_phi. { dg-warning "may return address of local variable" "pr90735" { target *-*-* } 0 } */