[X86] DAGCombine should not introduce FILD in soft-float mode

The x86 "sitofp i64 to double" dag combine, in 32-bit mode, lowers sitofp 
directly to X86ISD::FILD (or FILD_FLAG). This should not be done in soft-float mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252042 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed