Krzysztof Parzyszek b56b4c886f Create subranges for new intervals resulting from live interval splitting ... The register allocator can split a live interval of a register into a set of smaller intervals. After the allocation of registers is complete, the rewriter will modify the IR to replace virtual registers with the corres- ponding physical registers. At this stage, if a register corresponding to a subregister of a virtual register is used, the rewriter will check if that subregister is undefined, and if so, it will add the <undef> flag to the machine operand. The function verifying liveness of the subregis- ter would assume that it is undefined, unless any of the subranges of the live interval proves otherwise. The problem is that the live intervals created during splitting do not have any subranges, even if the original parent interval did. This could result in the <undef> flag placed on a register that is actually defined. Differential Revision: http://reviews.llvm.org/D21189 llvm-svn: 279625		2016-08-24 13:37:55 +00:00
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llvm	Create subranges for new intervals resulting from live interval splitting	2016-08-24 13:37:55 +00:00
llvm-c	Propery format doccomment in lto.h . NFC	2016-07-26 04:20:30 +00:00