[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: unassig...@gcc.gnu.org

        ReportedBy: gnu...@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: