70905e0afa
`Constant::isZeroValue` currently behaves same as `Constant::isNullValue` for all types except floating-point, where it additionally returns true for negative zero (`-0.0`). However, in practice, almost all callers operate on integer/pointer types where the two are equivalent, and the few FP-relevant callers have no meaningful dependence on the `-0.0` behavior. This PR removes `isZeroValue` to eliminate the confusing API. All callers are changed to `isNullValue` with no test failures. `isZeroValue` will be reintroduced in a future change with clearer semantics: when null pointers may have non-zero bit patterns, `isZeroValue` will check for bitwise-all-zeros, while `isNullValue` will check for the semantic null (which may be non-zero).
The LLVM Compiler Infrastructure
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called "LLVM". This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Getting the Source Code and Building LLVM
Consult the Getting Started with LLVM page for information on building and running LLVM.
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