[Bug target/56441] New: [ARM Thumb] generated asm code produces "branch out of range" error in gas with -O1 -mcpu=cortex-m3

[gnugcc at emblocks dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56441

             Bug #: 56441
           Summary: [ARM Thumb] generated asm code produces "branch out of
                    range" error in gas with -O1 -mcpu=cortex-m3
    Classification: Unclassified
           Product: gcc
           Version: 4.7.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gnugcc@emblocks.org


Already applied patch 43961.

Only with -O1 (other optimizations levels are going well).

The .LVL137 (cbnz)  is giving the error.



snippet:

    strb    r4, [r0, #30]
.LVL136:
    .loc 1 2362 0
    ldrb    r1, [r1, #15]    @ zero_extendqisi2
.LVL137:
    cbnz    r1, .L35
.LVL138:
    .loc 1 2366 0
    mov    r1, #30
    b    .L6
.LVL139: