llvm-project/llvm/lib/Target/NVPTX/MCTargetDesc
Craig Topper c7a0b2684f [X86][MC][Target] Initial backend support a tune CPU to support -mtune
This patch implements initial backend support for a -mtune CPU controlled by a "tune-cpu" function attribute. If the attribute is not present X86 will use the resolved CPU from target-cpu attribute or command line.

This patch adds MC layer support a tune CPU. Each CPU now has two sets of features stored in their GenSubtargetInfo.inc tables . These features lists are passed separately to the Processor and ProcessorModel classes in tablegen. The tune list defaults to an empty list to avoid changes to non-X86. This annoyingly increases the size of static tables on all target as we now store 24 more bytes per CPU. I haven't quantified the overall impact, but I can if we're concerned.

One new test is added to X86 to show a few tuning features with mismatched tune-cpu and target-cpu/target-feature attributes to demonstrate independent control. Another new test is added to demonstrate that the scheduler model follows the tune CPU.

I have not added a -mtune to llc/opt or MC layer command line yet. With no attributes we'll just use the -mcpu for both. MC layer tools will always follow the normal CPU for tuning.

Differential Revision: https://reviews.llvm.org/D85165
2020-08-14 15:31:50 -07:00
..
CMakeLists.txt
LLVMBuild.txt
NVPTXBaseInfo.h
NVPTXInstPrinter.cpp
NVPTXInstPrinter.h
NVPTXMCAsmInfo.cpp [MC,NVPTX] Add MCAsmPrinter support for unsigned-only data directives. 2020-07-20 16:24:41 -07:00
NVPTXMCAsmInfo.h [NVPTX] Remove unused forward declarations. NFC. 2020-04-23 16:30:44 +01:00
NVPTXMCTargetDesc.cpp [X86][MC][Target] Initial backend support a tune CPU to support -mtune 2020-08-14 15:31:50 -07:00
NVPTXMCTargetDesc.h [NVPTX] Remove unused forward declarations. NFC. 2020-04-23 16:30:44 +01:00
NVPTXTargetStreamer.cpp [MC] De-capitalize MCStreamer::Emit{Bundle,Addrsig}* etc 2020-02-15 09:11:48 -08:00
NVPTXTargetStreamer.h