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Commit d7d0d4e8 authored by Jakob Stoklund Olesen's avatar Jakob Stoklund Olesen
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When creating X86 MUL8 and DIV8 instructions, make sure we don't produce 

CopyFromReg nodes for aliasing registers (AX and AL). This confuses the fast
register allocator.

Instead of CopyFromReg(AL), use ExtractSubReg(CopyFromReg(AX), sub_8bit).

This fixes PR7312.

llvm-svn: 106934
parent 69a5af21
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