We add global register vars into the LTO symtab processed by the
linker. That's of course bogus. Fixed with the following patch.
Bootstrap & regtest running on x86_64-unknown-linux-gnu.
Richard.
2013-02-12 Richard Biener <rguent...@suse.de>
PR lto/56297
* lto-streamer-out.c (write_symbol): Do not output symbols
for hard register variables.
* gcc.dg/lto/pr56297_0.c: New testcase.
* gcc.dg/lto/pr56297_0.c: Likewise.
Index: gcc/lto-streamer-out.c
===================================================================
*** gcc/lto-streamer-out.c (revision 195973)
--- gcc/lto-streamer-out.c (working copy)
*************** write_symbol (struct streamer_tree_cache
*** 1166,1172 ****
if (!TREE_PUBLIC (t)
|| is_builtin_fn (t)
|| DECL_ABSTRACT (t)
! || TREE_CODE (t) == RESULT_DECL)
return;
gcc_assert (TREE_CODE (t) == VAR_DECL
--- 1166,1173 ----
if (!TREE_PUBLIC (t)
|| is_builtin_fn (t)
|| DECL_ABSTRACT (t)
! || TREE_CODE (t) == RESULT_DECL
! || (TREE_CODE (t) == VAR_DECL && DECL_HARD_REGISTER (t)))
return;
gcc_assert (TREE_CODE (t) == VAR_DECL
Index: gcc/testsuite/gcc.dg/lto/pr56297_0.c
===================================================================
*** gcc/testsuite/gcc.dg/lto/pr56297_0.c (revision 0)
--- gcc/testsuite/gcc.dg/lto/pr56297_0.c (working copy)
***************
*** 0 ****
--- 1,13 ----
+ /* { dg-lto-do link } */
+ /* { dg-lto-options { { -flto -fno-common } } } */
+
+ #if __x86_64__ || __i386__
+ register int i asm("esp");
+ #else
+ extern int i;
+ #endif
+
+ int main(void)
+ {
+ return i;
+ }
Index: gcc/testsuite/gcc.dg/lto/pr56297_1.c
===================================================================
*** gcc/testsuite/gcc.dg/lto/pr56297_1.c (revision 0)
--- gcc/testsuite/gcc.dg/lto/pr56297_1.c (working copy)
***************
*** 0 ****
--- 1,5 ----
+ #if __x86_64__ || __i386__
+ register int i asm("esp");
+ #else
+ int i;
+ #endif
