Re: [Qemu-devel] possible qemu miscompilation by latest gcc

2010-01-21 Thread Richard Henderson
On 01/20/2010 10:15 PM, John Regehr wrote: Hi folks- Just wanted to let you know that perhaps the function helper_neon_rshl_s8() is being miscompiled by the latest gcc. I'm using qemu 0.12.2 and gcc rev 156103, which is a pre-version of gcc 4.5. This is on an x86 machine running Ubuntu 9.10. A

[Qemu-devel] possible qemu miscompilation by latest gcc

2010-01-20 Thread John Regehr
Hi folks- Just wanted to let you know that perhaps the function helper_neon_rshl_s8() is being miscompiled by the latest gcc. I'm using qemu 0.12.2 and gcc rev 156103, which is a pre-version of gcc 4.5. This is on an x86 machine running Ubuntu 9.10. At -O2 or higher this is the resulting o