[llvm-commits] Fix bug 12769 MCAssembler crashes with -mthumb -mcpu=cortex-a9

[Weiming Zhao]

Hello,

 

On LLVM 3.1, clang crashes when "-mthumb -mcpu=cortex-a9 -integrated-as" are
specified with the following C code:

void foo()

{

  exit(1);

}

 

Or the asm code:

                .syntax unified

                .fpu neon

                .eabi_attribute 10, 3

                .eabi_attribute 12, 1

                .eabi_attribute 20, 1

                .eabi_attribute 21, 1

                .eabi_attribute 23, 3

                .eabi_attribute 24, 1

                .eabi_attribute 25, 1

                .file        "test_exit.c"

                .text

                .globl    foo

                .align     2

                .type     foo,%function

                .code     16

                .thumb_func

foo:

                push      {r7, lr}

                mov       r7, sp

                movs     r0, #1

                mov       lr, pc

                b.w        exit

.Ltmp0:

                .size       foo, .Ltmp0-foo

 

Bug is reported at: http://llvm.org/bugs/show_bug.cgi?id=12769

 

This patch fixes the issue. And it also passes the test suite. For the unit
tests, it doesn't create new fails. (details are in tests.tar)

Fix-12769.patch is the patch, which is also attached in bugzilla.

 

Please review it.

 

Thanks,

Weiming

 

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