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Commit 74f98391 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] combineSetCCMOVMSK - allow comparison with upper (known zero) bits... 

[X86][SSE] combineSetCCMOVMSK - allow comparison with upper (known zero) bits in CMP(MOVMSK(PACKSS())) -> CMP(MOVMSK()) fold

We already allow the comparison of the upper bits of 'IsAllOf' (allbits) patterns, but we can safely compare the known zero bits for 'IsAnyOf' (zerobits) patterns as well.

This fixes an issues where we are comparing a type wide than the number of vector elements, which avoids a regression mentioned in rGbaadbe04bf75.
parent 62328f2f
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