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From: Richard Henderson <rth@twiddle.net>
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Date: Fri, 24 Jul 2015 13:15:08 -0700
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Subject: Re: [Qemu-devel] [PATCH for-2.5 04/10] tcg/optimize: allow constant
 to have copies
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To: Aurelien Jarno <aurelien@aurel32.net>, qemu-devel@nongnu.org

On 07/24/2015 09:30 AM, Aurelien Jarno wrote:
> Now that copies and constants are tracked separately, we can allow
> constant to have copies, deferring the choice to use a register or a
> constant to the register allocation pass. This prevent this kind of
> regular constant reloading:

This appears to cause

$ gdb --args ./x86_64-linux-user/qemu-x86_64 /bin/ls
...
(gdb) run
Starting program: /home/rth/work/qemu/bld/x86_64-linux-user/qemu-x86_64 /bin/ls
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7ffff6604700 (LWP 7767)]
qemu-x86_64: /home/rth/work/qemu/qemu/tcg/tcg.c:1827: tcg_reg_alloc_bb_end:
Assertion `ts->val_type == TEMP_VAL_DEAD' failed.

Program received signal SIGABRT, Aborted.


r~