[Bug rtl-optimization/37296] [4.4 Regression] Bootstrap failure compiling libgcc

["vmakarov at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #18 from vmakarov at redhat dot com  2008-09-02 17:29 -------
I've looked at the cgraphbuild.i code and I think something is wrong with
inlining.  There are two paths achieving L21 with different stack adjustments. 
Here is the code.  I marked insns adjusting SP by -> and the two insns should
refer to the same location by !

.globl rebuild_cgraph_edges
        .type   rebuild_cgraph_edges, @function
rebuild_cgraph_edges:
        pushl   %ebp
        pushl   %edi
        pushl   %esi
        pushl   %ebx
        subl    $56, %esp
        movl    current_function_decl, %edx
        pushl   %edx
        call    cgraph_node
!       movl    %eax, 32(%esp)
        movl    %eax, (%esp)
        call    cgraph_node_remove_callees
        movl    cfun, %eax
        movl    4(%eax), %ecx
        movl    32(%esp), %edi
-->     addl    $16, %esp
        movl    (%ecx), %edx
        movl    36(%edx), %ebx
        movl    40(%edx), %esi
        movl    %esi, 100(%edi)
        movl    %ebx, 96(%edi)
        movl    28(%edx), %edi
        cmpl    4(%ecx), %edi
        je      .L21
...
.L31:
        movl    28(%eax), %edx
        movl    %edx, 12(%esp)
        cmpw    $29, (%edx)
        jne     .L50
        cmpl    $9, tree_code_type+480
        je      .L51
        movl    28(%esp), %edx
        testl   %edx, %edx
        jle     .L52
        movl    48(%edi), %eax
        movl    %eax, 8(%esp)
--->    subl    $12, %esp
        pushl   %edi
        call    compute_call_stmt_bb_frequency
        movl    %eax, %ebp
        popl    %eax
        movl    36(%edi), %edx
        movl    40(%edi), %ecx
        movl    24(%esp), %eax
        pushl   %eax
        movl    %edx, 20(%esp)
        movl    %ecx, 16(%esp)
        call    cgraph_node
--->    addl    $12, %esp
        movl    12(%esp), %edx
        pushl   %edx
        pushl   %ebp
        movl    16(%esp), %edx
        movl    12(%esp), %ecx
        pushl   %ecx
        pushl   %edx
        pushl   %esi
        pushl   %eax
        movl    44(%esp), %ebp
        pushl   %ebp
        call    cgraph_create_edge
        movl    8(%ebx), %ebx
-->     addl    $32, %esp
        testl   %ebx, %ebx
        jne     .L42
        .p2align 4,,7
        .p2align 3
.L45:
        movl    cfun, %eax
.L22:
        movl    4(%eax), %edx
        movl    28(%edi), %edi
        cmpl    %edi, 4(%edx)
        jne     .L41
.L21:
!       movl    48(%esp), %eax
        call    initialize_inline_failed
...


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37296