[Bug middle-end/55597] [4.8 Regression] internal compiler error: in plus_constant, at explow.c:88

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55597



--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> 2012-12-05 17:55:51 
UTC ---

Does this patch



diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c

index a24e407..b496490 100644

--- a/gcc/config/i386/i386.c

+++ b/gcc/config/i386/i386.c

@@ -12802,6 +12802,8 @@ legitimize_tls_address (rtx x, enum tls_model model,

bool for_mov)

           end_sequence ();



           RTL_CONST_CALL_P (insns) = 1;

+          if (GET_MODE (x) != Pmode)

+        x = gen_rtx_ZERO_EXTEND (Pmode, x);

           emit_libcall_block (insns, dest, rax, x);

         }

       else



make any senses?