Re: Getting a broken program when the -funroll-loops flag is set (gcc linaro arm)

On 12 November 2012 09:19, Mickey Iluz mickey.iluz@orcam.com wrote:

Hi,

I've encountered a case where gcc produces a broken program: a branch that should never be taken is taken, and wrong values are written to memory (and printed out). The code is fairly ordinary and small. It can be seen here: http://pastebin.com/0Hspz8mw

[...[

I compiled this with two different compilers/environments:

1. g++ (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3, running on 3.2.1-42-linaro-lt-mx6 (native compilation on the ARM board)

Compilation command:

2. arm-fsl-linux-gnueabi-g++ (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) 4.6.2 20110630 (prerelease)

It would be great if you could test this with a 4.7 release as well. If possible, a test with 4.8 trunk would also be useful.