forked from OSchip/llvm-project
ec95c6cc0a
Summary: If we have the code like this: ``` float a, b; a = std::max(a ,b); ``` it is converted into something like this: ``` %call = call dereferenceable(4) float* @_ZSt3maxIfERKT_S2_S2_(float* nonnull dereferenceable(4) %a.addr, float* nonnull dereferenceable(4) %b.addr) %1 = bitcast float* %call to i32* %2 = load i32, i32* %1, align 4 %3 = bitcast float* %a.addr to i32* store i32 %2, i32* %3, align 4 ``` After inlinning this code is converted to the next: ``` %1 = load float, float* %a.addr %2 = load float, float* %b.addr %cmp.i = fcmp fast olt float %1, %2 %__b.__a.i = select i1 %cmp.i, float* %a.addr, float* %b.addr %3 = bitcast float* %__b.__a.i to i32* %4 = load i32, i32* %3, align 4 %5 = bitcast float* %arrayidx to i32* store i32 %4, i32* %5, align 4 ``` This pattern is not recognized as minmax pattern. Patch solves this problem by converting sequence ``` store (bitcast, (load bitcast (select ((cmp V1, V2), &V1, &V2)))) ``` to a sequence ``` store (,load (select((cmp V1, V2), &V1, &V2))) ``` After this the code is recognized as minmax pattern. Reviewers: RKSimon, spatel Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D40304 llvm-svn: 320157 |
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| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| projects | ||
| resources | ||
| runtimes | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| .arcconfig | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitattributes | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| LLVMBuild.txt | ||
| README.txt | ||
| RELEASE_TESTERS.TXT | ||
| configure | ||
| llvm.spec.in | ||
README.txt
Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you are writing a package for LLVM, see docs/Packaging.rst for our suggestions.