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David Sherwood 7b64765cd1 [SVE] Fix TypeSize related warnings with IR truncates of scalable vectors 
In getCastInstrCost when the instruction is a truncate we were relying
upon the implicit TypeSize -> uint64_t cast when asking if a given type
has the same size as a legal integer. I've changed the code to only
ask the question if the type is fixed length.

I have also changed InstCombinerImpl::SimplifyDemandedUseBits to bail
out for now if the type is a scalable vector.

I've added the following new tests:

  Analysis/CostModel/AArch64/sve-trunc.ll
  Transforms/InstCombine/AArch64/sve-trunc.ll

for both of these fixes.

Differential revision: https://reviews.llvm.org/D86432
 		2020-08-25 09:17:56 +01:00
..
llvm [SVE] Fix TypeSize related warnings with IR truncates of scalable vectors 2020-08-25 09:17:56 +01:00
llvm-c [DebugInfo][flang]Added support for representing Fortran assumed length strings 2020-08-22 10:13:40 +05:30