[PATCH] D15151: Do not try to use i8 and i16 versions of FP_TO_INT soft float library calls

[Michael Kuperstein via llvm-commits]

mkuper created this revision.
mkuper added reviewers: asl, t.p.northover, nadav, DavidKreitzer.
mkuper added a subscriber: llvm-commits.

It appears that neither compiler-rt nor the gnu soft-float libraries actually implement these conversions.

Instead of producing calls to library functions that don't exist, handle it similarly to the way we handle i8 -> float and i16 -> float conversions - call the i32 library function, and adjust the type.

http://reviews.llvm.org/D15151

Files:
  include/llvm/CodeGen/RuntimeLibcalls.h
  lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
  lib/CodeGen/SelectionDAG/LegalizeTypes.h
  lib/CodeGen/TargetLoweringBase.cpp
  test/CodeGen/X86/soft-sitofp.ll

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