static void s390_select_rtx_section PARAMS ((enum machine_mode, rtx,
unsigned HOST_WIDE_INT));
static void s390_encode_section_info PARAMS ((tree, int));
-static void s390_output_mi_thunk PARAMS ((FILE *, tree, HOST_WIDE_INT, tree));
+static void s390_output_mi_vcall_thunk PARAMS ((FILE *, tree, HOST_WIDE_INT,
+ HOST_WIDE_INT, tree));
#undef TARGET_ASM_ALIGNED_HI_OP
#define TARGET_ASM_ALIGNED_HI_OP "\t.word\t"
#undef TARGET_ENCODE_SECTION_INFO
#define TARGET_ENCODE_SECTION_INFO s390_encode_section_info
-#undef TARGET_ASM_OUTPUT_MI_THUNK
-#define TARGET_ASM_OUTPUT_MI_THUNK s390_output_mi_thunk
+#undef TARGET_ASM_OUTPUT_MI_VCALL_THUNK
+#define TARGET_ASM_OUTPUT_MI_VCALL_THUNK s390_output_mi_vcall_thunk
struct gcc_target targetm = TARGET_INITIALIZER;
}
}
+/* Output thunk to FILE that implements a C++ virtual function call (with
+ multiple inheritance) to FUNCTION. The thunk adjusts the this pointer
+ by DELTA, and unless VCALL_OFFSET is zero, applies an additional adjustment
+ stored at VCALL_OFFSET in the vtable whose address is located at offset 0
+ relative to the resulting this pointer. */
+
static void
-s390_output_mi_thunk (file, thunk, delta, function)
+s390_output_mi_vcall_thunk (file, thunk, delta, vcall_offset, function)
FILE *file;
tree thunk ATTRIBUTE_UNUSED;
HOST_WIDE_INT delta;
+ HOST_WIDE_INT vcall_offset;
tree function;
{
- if (TARGET_64BIT)
- {
- if (flag_pic)
- {
- fprintf (file, "\tlarl 1,0f\n");
- fprintf (file, "\tagf %d,0(1)\n",
- aggregate_value_p (TREE_TYPE
- (TREE_TYPE (function))) ? 3 :2 );
- fprintf (file, "\tlarl 1,");
- assemble_name (file, XSTR (XEXP (DECL_RTL (function), 0), 0));
- fprintf (file, "@GOTENT\n");
- fprintf (file, "\tlg 1,0(1)\n");
- fprintf (file, "\tbr 1\n");
- fprintf (file, "0:\t.long ");
- fprintf (file, HOST_WIDE_INT_PRINT_DEC, (delta));
- fprintf (file, "\n");
- }
- else
- {
- fprintf (file, "\tlarl 1,0f\n");
- fprintf (file, "\tagf %d,0(1)\n",
- aggregate_value_p (TREE_TYPE
- (TREE_TYPE (function))) ? 3 :2 );
- fprintf (file, "\tjg ");
- assemble_name (file, XSTR (XEXP (DECL_RTL (function), 0), 0));
- fprintf (file, "\n");
- fprintf (file, "0:\t.long ");
- fprintf (file, HOST_WIDE_INT_PRINT_DEC, (delta));
- fprintf (file, "\n");
- }
- }
- else
- {
- if (flag_pic)
- {
- fprintf (file, "\tbras 1,0f\n");
- fprintf (file, "\t.long _GLOBAL_OFFSET_TABLE_-.\n");
- fprintf (file, "\t.long ");
- assemble_name (file, XSTR (XEXP (DECL_RTL (function), 0), 0));
- fprintf (file, "@GOT\n");
- fprintf (file, "\t.long ");
- fprintf (file, HOST_WIDE_INT_PRINT_DEC, (delta));
- fprintf (file, "\n");
- fprintf (file, "0:\tal %d,8(1)\n",
- aggregate_value_p (TREE_TYPE
- (TREE_TYPE (function))) ? 3 : 2 );
- fprintf (file, "\tl 0,4(1)\n");
- fprintf (file, "\tal 1,0(1)\n");
- fprintf (file, "\talr 1,0\n");
- fprintf (file, "\tl 1,0(1)\n");
- fprintf (file, "\tbr 1\n");
- } else {
- fprintf (file, "\tbras 1,0f\n");
- fprintf (file, "\t.long ");
- assemble_name (file, XSTR (XEXP (DECL_RTL (function), 0), 0));
- fprintf (file, "-.\n");
- fprintf (file, "\t.long ");
- fprintf (file, HOST_WIDE_INT_PRINT_DEC, (delta));
- fprintf (file, "\n");
- fprintf (file, "0:\tal %d,4(1)\n",
- aggregate_value_p (TREE_TYPE
- (TREE_TYPE (function))) ? 3 : 2 );
- fprintf (file, "\tal 1,0(1)\n");
- fprintf (file, "\tbr 1\n");
- }
- }
+ rtx op[9];
+
+ /* Operand 0 is the target function. */
+ op[0] = XEXP (DECL_RTL (function), 0);
+ if (flag_pic && !SYMBOL_REF_FLAG (op[0]))
+ {
+ op[0] = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, op[0]), 113);
+ op[0] = gen_rtx_CONST (Pmode, op[0]);
+ }
+
+ /* Operand 1 is the 'this' pointer. */
+ if (aggregate_value_p (TREE_TYPE (TREE_TYPE (function))))
+ op[1] = gen_rtx_REG (Pmode, 3);
+ else
+ op[1] = gen_rtx_REG (Pmode, 2);
+
+ /* Operand 2 is the delta. */
+ op[2] = GEN_INT (delta);
+
+ /* Operand 3 is the vcall_offset. */
+ op[3] = GEN_INT (vcall_offset);
+
+ /* Operand 4 is the temporary register. */
+ op[4] = gen_rtx_REG (Pmode, 1);
+
+ /* Operands 5 to 8 can be used as labels. */
+ op[5] = NULL_RTX;
+ op[6] = NULL_RTX;
+ op[7] = NULL_RTX;
+ op[8] = NULL_RTX;
+
+ /* Generate code. */
+ if (TARGET_64BIT)
+ {
+ /* Setup literal pool pointer if required. */
+ if (!CONST_OK_FOR_LETTER_P (delta, 'K')
+ || !CONST_OK_FOR_LETTER_P (vcall_offset, 'K'))
+ {
+ op[5] = gen_label_rtx ();
+ output_asm_insn ("larl\t%4,%5", op);
+ }
+
+ /* Add DELTA to this pointer. */
+ if (delta)
+ {
+ if (CONST_OK_FOR_LETTER_P (delta, 'J'))
+ output_asm_insn ("la\t%1,%2(%1)", op);
+ else if (CONST_OK_FOR_LETTER_P (delta, 'K'))
+ output_asm_insn ("aghi\t%1,%2", op);
+ else
+ {
+ op[6] = gen_label_rtx ();
+ output_asm_insn ("agf\t%1,%6-%5(%4)", op);
+ }
+ }
+
+ /* Perform vcall adjustment. */
+ if (vcall_offset)
+ {
+ if (CONST_OK_FOR_LETTER_P (vcall_offset, 'J'))
+ {
+ output_asm_insn ("lg\t%4,0(%1)", op);
+ output_asm_insn ("ag\t%1,%3(%4)", op);
+ }
+ else if (CONST_OK_FOR_LETTER_P (vcall_offset, 'K'))
+ {
+ output_asm_insn ("lghi\t%4,%3", op);
+ output_asm_insn ("ag\t%4,0(%1)", op);
+ output_asm_insn ("ag\t%1,0(%4)", op);
+ }
+ else
+ {
+ op[7] = gen_label_rtx ();
+ output_asm_insn ("llgf\t%4,%7-%5(%4)", op);
+ output_asm_insn ("ag\t%4,0(%1)", op);
+ output_asm_insn ("ag\t%1,0(%4)", op);
+ }
+ }
+
+ /* Jump to target. */
+ output_asm_insn ("jg\t%0", op);
+
+ /* Output literal pool if required. */
+ if (op[5])
+ {
+ output_asm_insn (".align\t4", op);
+ ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (op[5]));
+ }
+ if (op[6])
+ {
+ ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (op[6]));
+ output_asm_insn (".long\t%2", op);
+ }
+ if (op[7])
+ {
+ ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (op[7]));
+ output_asm_insn (".long\t%3", op);
+ }
+ }
+ else
+ {
+ /* Setup base pointer if required. */
+ if (!vcall_offset
+ || !CONST_OK_FOR_LETTER_P (delta, 'K')
+ || !CONST_OK_FOR_LETTER_P (vcall_offset, 'K'))
+ {
+ op[5] = gen_label_rtx ();
+ output_asm_insn ("basr\t%4,0", op);
+ ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (op[5]));
+ }
+
+ /* Add DELTA to this pointer. */
+ if (delta)
+ {
+ if (CONST_OK_FOR_LETTER_P (delta, 'J'))
+ output_asm_insn ("la\t%1,%2(%1)", op);
+ else if (CONST_OK_FOR_LETTER_P (delta, 'K'))
+ output_asm_insn ("ahi\t%1,%2", op);
+ else
+ {
+ op[6] = gen_label_rtx ();
+ output_asm_insn ("a\t%1,%6-%5(%4)", op);
+ }
+ }
+
+ /* Perform vcall adjustment. */
+ if (vcall_offset)
+ {
+ if (CONST_OK_FOR_LETTER_P (vcall_offset, 'J'))
+ {
+ output_asm_insn ("lg\t%4,0(%1)", op);
+ output_asm_insn ("a\t%1,%3(%4)", op);
+ }
+ else if (CONST_OK_FOR_LETTER_P (vcall_offset, 'K'))
+ {
+ output_asm_insn ("lhi\t%4,%3", op);
+ output_asm_insn ("a\t%4,0(%1)", op);
+ output_asm_insn ("a\t%1,0(%4)", op);
+ }
+ else
+ {
+ op[7] = gen_label_rtx ();
+ output_asm_insn ("l\t%4,%7-%5(%4)", op);
+ output_asm_insn ("a\t%4,0(%1)", op);
+ output_asm_insn ("a\t%1,0(%4)", op);
+ }
+
+ /* We had to clobber the base pointer register.
+ Re-setup the base pointer (with a different base). */
+ op[5] = gen_label_rtx ();
+ output_asm_insn ("basr\t%4,0", op);
+ ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (op[5]));
+ }
+
+ /* Jump to target. */
+ op[8] = gen_label_rtx ();
+ if (!flag_pic)
+ output_asm_insn ("l\t%4,%8-%5(%4)", op);
+ else
+ output_asm_insn ("a\t%4,%8-%5(%4)", op);
+ output_asm_insn ("br\t%4", op);
+
+ /* Output literal pool. */
+ output_asm_insn (".align\t4", op);
+ ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (op[8]));
+ if (!flag_pic)
+ output_asm_insn (".long\t%0", op);
+ else
+ output_asm_insn (".long\t%0-%5", op);
+
+ if (op[6])
+ {
+ ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (op[6]));
+ output_asm_insn (".long\t%2", op);
+ }
+ if (op[7])
+ {
+ ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (op[7]));
+ output_asm_insn (".long\t%3", op);
+ }
+ }
}
+
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