[Bug target/53853] FAIL: g++.dg/other/pr53811.C -std=gnu++* (internal compiler error)

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53853

Uros Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Uros Bizjak <ubizjak at gmail dot com> 2012-07-05 12:07:31 UTC ---
It turned out that -mcmodel -fPIC also ICEd on x86_64-pc-linux-gnu.

We need additional part to handle CM_LARGE_PIC, basically:

--cut here--
@@ -33057,6 +33059,10 @@ x86_output_mi_thunk (FILE *file,
     emit_jump_insn (gen_indirect_jump (fnaddr));
   else
     {
+      if (ix86_cmodel == CM_LARGE_PIC
+      && GET_CODE (fnaddr) == SYMBOL_REF)
+    fnaddr = construct_plt_address (fnaddr,
+                    gen_rtx_REG (Pmode, tmp_regno));
       if (!sibcall_insn_operand (fnaddr, word_mode))
     {
       tmp = gen_rtx_REG (word_mode, tmp_regno);
--cut here--

to create:

        .size   _ZN12ScriptString12CreateStringEPKc,
.-_ZN12ScriptString12CreateStringEPKc
        .set    .LTHUNK0,_ZN12ScriptString12CreateStringEPKc
        .p2align 4,,15
        .globl  _ZThn8_N12ScriptString12CreateStringEPKc
        .type   _ZThn8_N12ScriptString12CreateStringEPKc, @function
_ZThn8_N12ScriptString12CreateStringEPKc:
.LFB1:
        .cfi_startproc
        subq    $8, %rdi
        movabsq $.LTHUNK0@PLTOFF, %r10
        addq    %rbx, %r10
        jmp     *%r10
        .cfi_endproc

I'd like to ask Jakub fo opinion here. The generated code otherwise works OK
for a couple of tests (g++.dg/inherit/thunk*.C) when compiled with
-mcmodel=large -fPIC.