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Re: Recent TCG commit breaks PPC

From: Richard Henderson
Subject: Re: Recent TCG commit breaks PPC
Date: Sat, 16 Jan 2021 07:29:22 -1000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

On 1/16/21 4:38 AM, BALATON Zoltan wrote:
> Commit 8fe35e0444be (tcg/optimize: Use tcg_constant_internal with constant
> folding) seems to break PPC emulation for me:
> Thread 3 "qemu-system-ppc" received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7ffff51e7700 (LWP 22636)]
> 0x0000555555afd4ee in ts_are_copies (ts2=0x7fff8c008f90, ts1=0x7fff8c001510) 
> at
> ../tcg/optimize.c:68
> 68        return ts_info(ts)->next_copy != ts;

I don't replicate this assertion.

Interestingly, I replicate a different assertion:

qemu-system-ppc: ../qemu/tcg/tcg.c:1210: tcg_temp_alloc: Assertion `n < 512'
Aborted (core dumped)

What compiler version(s) are you guys using?


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