[Bug rtl-optimization/37377] [4.4 Regression] Bootstrap failure compiling libgcc

[ebotcazou at gcc dot gnu dot org]

------- Comment #3 from ebotcazou at gcc dot gnu dot org  2008-09-04 20:36 -------
In the assembly file:

.L871:
        movl    %ebx, %eax
        movl    %edx, 20(%ebx)
        call    T.911
        movl    df, %esi
        movl    60(%esi), %eax
        movl    %esi, 36(%esp)  <-- save df
        movl    (%eax), %eax
        movl    %eax, 44(%esp)
        testl   %eax, %eax
        je      .L1052

[...]

L895:
        movl    4(%ecx), %esi
        cmpb    $0, 22(%esp)
        je      .L896
        movl    144(%edi), %eax
        movl    (%eax,%esi,4), %eax
        movl    4(%eax), %edx
        movl    (%edx), %eax
        testl   %eax, %eax
        je      .L896
        movl    16(%esp), %ebp
        movl    8(%ebp), %ebp
        movl    %ebp, 36(%esp)  <-- overwrite df
        .p2align 4,,7
        .p2align 3
.L897:
        movl    28(%eax), %eax
        addl    $4, %edx
        incl    (%ebp,%eax,4)
        movl    (%edx), %eax
        testl   %eax, %eax
        jne     .L897
.L896:
        cmpb    $0, 23(%esp)
        je      .L898
        movl    144(%edi), %eax
        movl    (%eax,%esi,4), %eax
        movl    8(%eax), %edx
        movl    (%edx), %eax
        testl   %eax, %eax
        je      .L898
        movl    16(%esp), %ebp
        movl    8(%ebp), %ebp
        movl    %ebp, 36(%esp)  <-- overwrite df

[...]

.L995:
        movl    36(%esp), %ecx  <-- load df
        movl    60(%ecx), %eax
        movl    (%eax), %eax    <-- segv (eax == 0)
        movl    %eax, 60(%esp)
        testl   %eax, %eax
        je      .L1059


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37377