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2015-12-02 Pierre-Marie de Rodat <derodat@adacore.com>
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* dwarf2out.c (dwar2out_var_location): Enhance pattern matching to get
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the SYMBOL_REF they embed.
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(gen_subprogram_die): Handle such calls.
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--- gcc/dwarf2out.c (revision 231184)
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+++ gcc/dwarf2out.c (revision 231185)
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@@ -18051,18 +18051,23 @@ gen_subprogram_die (tree decl, dw_die_re
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}
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if (mode == VOIDmode || mode == BLKmode)
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continue;
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- if (XEXP (XEXP (arg, 0), 0) == pc_rtx)
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+ /* Get dynamic information about call target only if we
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+ have no static information: we cannot generate both
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+ DW_AT_abstract_origin and DW_AT_GNU_call_site_target
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+ attributes. */
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+ if (ca_loc->symbol_ref == NULL_RTX)
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{
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- gcc_assert (ca_loc->symbol_ref == NULL_RTX);
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- tloc = XEXP (XEXP (arg, 0), 1);
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- continue;
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- }
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- else if (GET_CODE (XEXP (XEXP (arg, 0), 0)) == CLOBBER
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- && XEXP (XEXP (XEXP (arg, 0), 0), 0) == pc_rtx)
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- {
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- gcc_assert (ca_loc->symbol_ref == NULL_RTX);
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- tlocc = XEXP (XEXP (arg, 0), 1);
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- continue;
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+ if (XEXP (XEXP (arg, 0), 0) == pc_rtx)
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+ {
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+ tloc = XEXP (XEXP (arg, 0), 1);
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+ continue;
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+ }
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+ else if (GET_CODE (XEXP (XEXP (arg, 0), 0)) == CLOBBER
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+ && XEXP (XEXP (XEXP (arg, 0), 0), 0) == pc_rtx)
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+ {
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+ tlocc = XEXP (XEXP (arg, 0), 1);
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+ continue;
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+ }
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}
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reg = NULL;
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if (REG_P (XEXP (XEXP (arg, 0), 0)))
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@@ -20842,15 +20847,27 @@ dwarf2out_var_location (rtx loc_note)
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if (!CALL_P (prev))
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prev = XVECEXP (PATTERN (prev), 0, 0);
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ca_loc->tail_call_p = SIBLING_CALL_P (prev);
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+
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+ /* Look for a SYMBOL_REF in the "prev" instruction. */
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x = get_call_rtx_from (PATTERN (prev));
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if (x)
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{
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- x = XEXP (XEXP (x, 0), 0);
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- if (GET_CODE (x) == SYMBOL_REF
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- && SYMBOL_REF_DECL (x)
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- && TREE_CODE (SYMBOL_REF_DECL (x)) == FUNCTION_DECL)
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- ca_loc->symbol_ref = x;
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+ /* Try to get the call symbol, if any. */
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+ if (MEM_P (XEXP (x, 0)))
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+ x = XEXP (x, 0);
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+ /* First, look for a memory access to a symbol_ref. */
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+ if (GET_CODE (XEXP (x, 0)) == SYMBOL_REF
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+ && SYMBOL_REF_DECL (XEXP (x, 0))
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+ && TREE_CODE (SYMBOL_REF_DECL (XEXP (x, 0))) == FUNCTION_DECL)
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+ ca_loc->symbol_ref = XEXP (x, 0);
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+ /* Otherwise, look at a compile-time known user-level function
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+ declaration. */
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+ else if (MEM_P (x)
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+ && MEM_EXPR (x)
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+ && TREE_CODE (MEM_EXPR (x)) == FUNCTION_DECL)
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+ ca_loc->symbol_ref = XEXP (DECL_RTL (MEM_EXPR (x)), 0);
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}
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+
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ca_loc->block = insn_scope (prev);
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if (call_arg_locations)
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call_arg_loc_last->next = ca_loc;
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