[PATCH] D20528: [X86][SSE] Replace lossless i32/f32 to f64 conversion intrinsics with generic IR

[Simon Pilgrim via cfe-commits]

RKSimon created this revision.
RKSimon added reviewers: qcolombet, craig.topper, mkuper, andreadb, spatel.
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Both the (V)CVTDQ2PD(Y) (i32 to f64) and (V)CVTPS2PD(Y) (f32 to f64) conversion instructions are lossless and can be safely represented as generic __builtin_convertvector calls instead of x86 intrinsics.

This patch removes the clang builtins and their use in the sse2/avx headers - a future patch will deal with removing the llvm intrinsics, but that will require a bit more work.

Repository:
  rL LLVM

http://reviews.llvm.org/D20528

Files:
  include/clang/Basic/BuiltinsX86.def
  lib/Headers/avxintrin.h
  lib/Headers/emmintrin.h
  test/CodeGen/avx-builtins.c
  test/CodeGen/builtins-x86.c
  test/CodeGen/sse2-builtins.c
  test/CodeGen/target-builtin-error-2.c

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