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m68k: put read-only arrays of computed gotos to its own text section (#275) (#276)

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Sigrid Solveig Haflínudóttir
2025-03-31 19:51:25 +00:00
committed by GitHub
parent 017f80ad50
commit 17d7e2bf04
1 changed files with 32 additions and 0 deletions
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gcc/gcc/config/m68k/m68k.cc
+32
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@@ -208,6 +208,35 @@ static bool m68k_modes_tieable_p (machine_mode, machine_mode);
static machine_mode m68k_promote_function_mode (const_tree, machine_mode,
int *, const_tree, int);
static void m68k_asm_final_postscan_insn (FILE *, rtx_insn *insn, rtx [], int);
static void
m68k_unique_section (tree decl, int reloc)
{
const char *name;
char *section = NULL;
tree type, chain;
/* Detect arrays pointing at labels - computed gotos. */
if (categorize_decl_for_section (decl, reloc) == SECCAT_RODATA
&& TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
{
type = TREE_TYPE (TREE_TYPE (decl));
chain = TREE_CHAIN (decl);
if (type && chain && TREE_CODE (type) == POINTER_TYPE
&& TREE_CODE (chain) == LABEL_DECL)
{
name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
name = targetm.strip_name_encoding (name);
section
= ACONCAT ((".text.", current_function_name (), ".", name, NULL));
set_decl_section_name (decl, section);
return;
}
}
default_unique_section (decl, reloc);
}
/* Initialize the GCC target structure. */
@@ -216,6 +245,9 @@ static void m68k_asm_final_postscan_insn (FILE *, rtx_insn *insn, rtx [], int);
#define TARGET_ASM_ALIGNED_HI_OP "\t.word\t"
#endif
#undef TARGET_ASM_UNIQUE_SECTION
#define TARGET_ASM_UNIQUE_SECTION m68k_unique_section
#if INT_OP_GROUP == INT_OP_NO_DOT
#undef TARGET_ASM_BYTE_OP
#define TARGET_ASM_BYTE_OP "\tbyte\t"