[X86][SSE] LowerUINT_TO_FP_i64 - only use HADDPD for size/fast-hops
authorSimon Pilgrim <llvm-dev@redking.me.uk>
Sat, 19 Oct 2019 11:53:48 +0000 (11:53 +0000)
committerSimon Pilgrim <llvm-dev@redking.me.uk>
Sat, 19 Oct 2019 11:53:48 +0000 (11:53 +0000)
commit6ada70d1b55b9efb8b0603575a0b86e14f049553
tree58433e616ace9a6d38daceaeaf5d33353d6b80c4
parentd5367db95c4295b088bf9ae3cf99e24d8bf7e249
[X86][SSE] LowerUINT_TO_FP_i64 - only use HADDPD for size/fast-hops

We were always generating a single source HADDPD, but really we should only do this if shouldUseHorizontalOp says its a good idea.

Differential Revision: https://reviews.llvm.org/D69175

llvm-svn: 375341
llvm/lib/Target/X86/X86ISelLowering.cpp
llvm/test/CodeGen/X86/avx512-intrinsics-fast-isel.ll
llvm/test/CodeGen/X86/haddsub-3.ll
llvm/test/CodeGen/X86/haddsub-broadcast.ll
llvm/test/CodeGen/X86/scalar-int-to-fp.ll