Re: [avr-gcc-list] Bug in *rotlsi3 insns?

[Georg-Johann Lay]

Anatoly Sokolov schrieb:
Hi.
Consider this test case:

unsigned long rotl (int dummy, unsigned long x)
{
    return (x << 8) | (x >> 24);
}

Compile with, e.g.
   avr-gcc -mmcu=atmega8 -S -Os -fno-split-wide-types

This will map 0x33221100 to 0x33110033 instead of to 0x22110033



Please test the patch.

reg_overlap_mentioned_p won't suffice because there are two cases 
depending on REGNO(src) < REGNO(dest) and REGNO(src) > REGNO(dest)

Georg-Johann



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