diff options
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr103204.c | 16 | ||||
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 13 |
2 files changed, 24 insertions, 5 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr103204.c b/gcc/testsuite/gcc.dg/torture/pr103204.c new file mode 100644 index 0000000..b08b686 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr103204.c @@ -0,0 +1,16 @@ +/* { dg-do compile } */ + +int a[1][1]; +int b, c; +void d() +{ + int e; + int f[0]; + int *g; + for (; e;) + c = b; + if (a[0][b] = (__UINTPTR_TYPE__)f != 3) + g = &f[b]; + int h; + *g = *g = *g = h; +} diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 7be5d4e..149674e 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -1640,13 +1640,12 @@ static void valueize_refs_1 (vec<vn_reference_op_s> *orig, bool *valueized_anything, bool with_avail = false) { - vn_reference_op_t vro; - unsigned int i; - *valueized_anything = false; - FOR_EACH_VEC_ELT (*orig, i, vro) + for (unsigned i = 0; i < orig->length (); ++i) { +re_valueize: + vn_reference_op_t vro = &(*orig)[i]; if (vro->opcode == SSA_NAME || (vro->op0 && TREE_CODE (vro->op0) == SSA_NAME)) { @@ -1694,7 +1693,11 @@ valueize_refs_1 (vec<vn_reference_op_s> *orig, bool *valueized_anything, && (*orig)[i - 1].opcode == MEM_REF) { if (vn_reference_maybe_forwprop_address (orig, &i)) - *valueized_anything = true; + { + *valueized_anything = true; + /* Re-valueize the current operand. */ + goto re_valueize; + } } /* If it transforms a non-constant ARRAY_REF into a constant one, adjust the constant offset. */ |