diff options
| -rw-r--r-- | gcc/ipa-fnsummary.cc | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/pr113787.c | 38 |
2 files changed, 41 insertions, 1 deletions
diff --git a/gcc/ipa-fnsummary.cc b/gcc/ipa-fnsummary.cc index 07a853f..2faf238 100644 --- a/gcc/ipa-fnsummary.cc +++ b/gcc/ipa-fnsummary.cc @@ -2648,7 +2648,9 @@ points_to_local_or_readonly_memory_p (tree t) return true; return !ptr_deref_may_alias_global_p (t, false); } - if (TREE_CODE (t) == ADDR_EXPR) + if (TREE_CODE (t) == ADDR_EXPR + && (TREE_CODE (TREE_OPERAND (t, 0)) != TARGET_MEM_REF + || TREE_CODE (TREE_OPERAND (TREE_OPERAND (t, 0), 0)) != INTEGER_CST)) return refs_local_or_readonly_memory_p (TREE_OPERAND (t, 0)); return false; } diff --git a/gcc/testsuite/gcc.c-torture/execute/pr113787.c b/gcc/testsuite/gcc.c-torture/execute/pr113787.c new file mode 100644 index 0000000..702b6c3 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/pr113787.c @@ -0,0 +1,38 @@ +void foo(int x, int y, int z, int d, int *buf) +{ + for(int i = z; i < y-z; ++i) + for(int j = 0; j < d; ++j) + /* buf[x(i+1) + j] = buf[x(i+1)-j-1] */ + buf[i*x+(x-z+j)] = buf[i*x+(x-z-1-j)]; +} + +void bar(int x, int y, int z, int d, int *buf) +{ + for(int i = 0; i < d; ++i) + for(int j = z; j < x-z; ++j) + /* buf[j+(y+i)*x] = buf[j+(y-1-i)*x] */ + buf[j+(y-z+i)*x] = buf[j+(y-z-1-i)*x]; +} + +__attribute__((noipa)) +void baz(int x, int y, int d, int *buf) +{ + foo(x, y, 0, d, buf); + bar(x, y, 0, d, buf); +} + +int main(void) +{ + int a[] = { 1, 2, 3 }; + baz (1, 2, 1, a); + /* foo does: + buf[1] = buf[0]; + buf[2] = buf[1]; + + bar does: + buf[2] = buf[1]; (no-op) + so we should have { 1, 1, 1 }. */ + for (int i = 0; i < 3; i++) + if (a[i] != 1) + __builtin_abort (); +} |