llvm-project/llvm/lib/Target/WebAssembly/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 [cmake] Explicitly mark libraries defined in lib/ as "Component Libraries" 2019-11-21 10:48:08 -08:00
LLVMBuild.txt
WebAssemblyAsmBackend.cpp [MC] Default MCAsmBackend::mayNeedRelaxation() to false 2020-08-02 22:13:59 -07:00
WebAssemblyFixupKinds.h [WebAssembly] Adding 64-bit versions of all load & store ops. 2020-06-15 08:31:56 -07:00
WebAssemblyInstPrinter.cpp [WebAssembly] Replace all calls with generalized multivalue calls 2020-02-18 15:55:20 -08:00
WebAssemblyInstPrinter.h [WebAssembly] Replace all calls with generalized multivalue calls 2020-02-18 15:55:20 -08:00
WebAssemblyMCAsmInfo.cpp
WebAssemblyMCAsmInfo.h
WebAssemblyMCCodeEmitter.cpp [WebAssembly] Adding 64-bit version of R_WASM_MEMORY_ADDR_* relocs 2020-06-15 10:07:42 -07:00
WebAssemblyMCTargetDesc.cpp [X86][MC][Target] Initial backend support a tune CPU to support -mtune 2020-08-14 15:31:50 -07:00
WebAssemblyMCTargetDesc.h [WebAssembly] Implement prototype v128.load{32,64}_zero instructions 2020-08-03 13:54:00 -07:00
WebAssemblyTargetStreamer.cpp [MCStreamer] De-capitalize EmitValue EmitIntValue{,InHex} 2020-02-14 23:08:40 -08:00
WebAssemblyTargetStreamer.h [WebAssembly] Remove unused forward declarations. NFC. 2020-04-23 16:30:45 +01:00
WebAssemblyWasmObjectWriter.cpp [WebAssembly] 64-bit (function) pointer fixes. 2020-07-16 14:10:22 -07:00