This adds srodata section support to the RISC-V port, putting small read-only
data in the .srodata section instead of the .sdata section. There is already
code to put small read-only rtx in .srodata* instead of .rodata*. This
does the same for small read-only trees to be consistent.
Tested with a rv32gc/ilp32 make check. There were no regressions. Committed.
2017-12-07 Andrew Waterman <and...@sifive.com>
gcc/
* config/riscv/riscv.c (TARGET_ASM_SELECT_SECTION): New define.
(TARGET_HAVE_SRODATA_SECTION): New define.
(riscv_select_section): New function.
---
gcc/config/riscv/riscv.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
index c7283d02141..cfab2e77686 100644
--- a/gcc/config/riscv/riscv.c
+++ b/gcc/config/riscv/riscv.c
@@ -3042,6 +3042,22 @@ riscv_in_small_data_p (const_tree x)
return riscv_size_ok_for_small_data_p (int_size_in_bytes (TREE_TYPE (x)));
}
+/* Switch to the appropriate section for output of DECL. */
+
+static section *
+riscv_select_section (tree decl, int reloc,
+ unsigned HOST_WIDE_INT align)
+{
+ switch (categorize_decl_for_section (decl, reloc))
+ {
+ case SECCAT_SRODATA:
+ return get_named_section (decl, ".srodata", reloc);
+
+ default:
+ return default_elf_select_section (decl, reloc, align);
+ }
+}
+
/* Return a section for X, handling small data. */
static section *
@@ -4320,6 +4336,12 @@ riscv_constant_alignment (const_tree exp, HOST_WIDE_INT
align)
#undef TARGET_IN_SMALL_DATA_P
#define TARGET_IN_SMALL_DATA_P riscv_in_small_data_p
+#undef TARGET_HAVE_SRODATA_SECTION
+#define TARGET_HAVE_SRODATA_SECTION true
+
+#undef TARGET_ASM_SELECT_SECTION
+#define TARGET_ASM_SELECT_SECTION riscv_select_section
+
#undef TARGET_ASM_SELECT_RTX_SECTION
#define TARGET_ASM_SELECT_RTX_SECTION riscv_elf_select_rtx_section
--
2.14.1
