diff options
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index 4ae541d..4237276 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -2911,7 +2911,32 @@ expand_debug_expr (tree exp) case ADDR_EXPR: op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); if (!op0 || !MEM_P (op0)) - return NULL; + { + if ((TREE_CODE (TREE_OPERAND (exp, 0)) == VAR_DECL + || TREE_CODE (TREE_OPERAND (exp, 0)) == PARM_DECL + || TREE_CODE (TREE_OPERAND (exp, 0)) == RESULT_DECL) + && !TREE_ADDRESSABLE (TREE_OPERAND (exp, 0))) + return gen_rtx_DEBUG_IMPLICIT_PTR (mode, TREE_OPERAND (exp, 0)); + + if (handled_component_p (TREE_OPERAND (exp, 0))) + { + HOST_WIDE_INT bitoffset, bitsize, maxsize; + tree decl + = get_ref_base_and_extent (TREE_OPERAND (exp, 0), + &bitoffset, &bitsize, &maxsize); + if ((TREE_CODE (decl) == VAR_DECL + || TREE_CODE (decl) == PARM_DECL + || TREE_CODE (decl) == RESULT_DECL) + && !TREE_ADDRESSABLE (decl) + && (bitoffset % BITS_PER_UNIT) == 0 + && bitsize > 0 + && bitsize == maxsize) + return plus_constant (gen_rtx_DEBUG_IMPLICIT_PTR (mode, decl), + bitoffset / BITS_PER_UNIT); + } + + return NULL; + } op0 = convert_debug_memory_address (mode, XEXP (op0, 0)); |