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3ca4ead75d
ISel: Make VSELECT selection terminate in cases where the condition type has to be split and the result type widened. When the condition of a vselect has to be split it makes no sense widening the vselect and thereby widening the condition. We end up in an endless loop of widening (vselect result type) and splitting (condition mask type) doing this. Instead, split both the condition and the vselect and widen the result. I ran this over the test suite with i686 and mattr=+sse and saw no regressions. Fixes PR18036. With this fix the original problem case from the graphics/rawtherapee port (posted in http://llvm.org/PR18036 ) now compiles within ~97MB RSS. Reported by: mandree MFC after: 1 week |
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