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| From: | Edmund Grimley Evans |
| Subject: | Re: [Tinycc-devel] [PATCH] tccgen.c: Optimise 0<<x, 0>>x, -1>>x, x&0, x*0, x|-1, x%1. |
| Date: | Fri, 6 Mar 2015 10:38:11 +0000 |
> On which archs "sizeof(long long) < sizeof(int)" ? None, but that's not the point. In general it is not allowed to write to one union member then read from another and I don't know of an exception that covers this particular case. However, I think it is allowed to memset a union to zero and read any integer from that union. If you have access to the C standard you can perhaps investigate further.
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