S/390: Use proper read-only data section for literals.

Previously, .rodata was hardcoded.  For C++ vague linkage functions,
this resulted in needlessly duplicated literals.  With the new split
stack support, this resulted in link errors, due to .rodata containing
relocations to the discarded text sections.

gcc/ChangeLog:

	* config/s390/s390.md (pool_section_start): Use switch_to_section
	to select proper read-only data section instead of hardcoding .rodata.
	(pool_section_end): Use switch_to_section to match the above.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232667 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dae468c..2ea6938 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2016-01-21  Marcin Kościelnicki  <koriakin@0x04.net>
+
+       * config/s390/s390.md (pool_section_start): Use switch_to_section
+       to select proper read-only data section instead of hardcoding
+       .rodata.
+       (pool_section_end): Use switch_to_section to match the above.
+
 2016-01-21  Richard Biener  <rguenther@suse.de>
 
         PR tree-optimization/69378

diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md
index 3e340c3..9b869d5 100644 (file)
--- a/gcc/config/s390/s390.md
+++ b/gcc/config/s390/s390.md
@@ -10247,13 +10247,20 @@
 (define_insn "pool_section_start"
   [(unspec_volatile [(const_int 1)] UNSPECV_POOL_SECTION)]
   ""
-  ".section\t.rodata"
+{
+  switch_to_section (targetm.asm_out.function_rodata_section
+                (current_function_decl));
+  return "";
+}
   [(set_attr "length" "0")])
 
 (define_insn "pool_section_end"
   [(unspec_volatile [(const_int 0)] UNSPECV_POOL_SECTION)]
   ""
-  ".previous"
+{
+  switch_to_section (current_function_section ());
+  return "";
+}
   [(set_attr "length" "0")])
 
 (define_insn "main_base_31_small"