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52 Commits

Author SHA1 Message Date
Chris Bieneman
6599fdab2c Add DXILPrepare CodeGen pass 
The DXIL Prepare pass handles the IR mutations required to convert
modern LLVM IR into something that more closely resembles LLVM-3.7 IR
so that the DXIL bitcode writer can emit 3.7 IR.

This change adds the codegen pass handling the first two IR
transformations:

* stripping new function attributes
* converting fneg into fsub

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D122081
 2022-04-05 11:50:07 -05:00
Chris Bieneman
44a14a6a1d Add stub DirectX backend 
This is the bare minimum needed to get the DirectX target compiling,
but does not actually do anything.

Reviewed By: pete, rnk, arsenm, jaebaek

Differential Revision: https://reviews.llvm.org/D122080
 2022-03-28 13:44:48 -05:00