[PATCH] D20860: [X86][SSE] Replace (V)CVTTPS2DQ and VCVTTPD2DQ truncating (round to zero) f32/f64 to i32 with generic IR (llvm)

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: ab, mkuper, craig.topper, spatel, andreadb.
RKSimon added a subscriber: llvm-commits.
RKSimon set the repository for this revision to rL LLVM.

This patch removes the llvm intrinsics (V)CVTTPS2DQ and VCVTTPD2DQ truncation (round to zero) conversions and auto-upgrades to FP_TO_SINT calls instead. 

Note: I looked at updating CVTTPD2DQ as well but this still requires a lot more work to correctly lower.

A companion patch (D20859) removes the clang intrinsics.

Repository:
  rL LLVM

http://reviews.llvm.org/D20860

Files:
  include/llvm/IR/IntrinsicsX86.td
  lib/IR/AutoUpgrade.cpp
  lib/Target/X86/X86InstrSSE.td
  test/CodeGen/X86/avx-intrinsics-fast-isel.ll
  test/CodeGen/X86/avx-intrinsics-x86-upgrade.ll
  test/CodeGen/X86/avx-intrinsics-x86.ll
  test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
  test/CodeGen/X86/sse2-intrinsics-x86-upgrade.ll
  test/CodeGen/X86/sse2-intrinsics-x86.ll

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