commit	3f1ce093ea4dd86c50ececa1da85edb78b904e72	[log] [tgz]
author	Eli Friedman <efriedma@codeaurora.org>	Thu Jun 14 22:58:48 2018 +0000
committer	Eli Friedman <efriedma@codeaurora.org>	Thu Jun 14 22:58:48 2018 +0000
tree	f50336563a7d7fe394368d5f5e555e7c3c099e46
parent	9afe1fa7e295d31ecdaed5ab33bf3e5bbb804f40 [diff]

Make uitofp and sitofp defined on overflow.

IEEE 754 defines the expected result on overflow. As far as I know,
hardware implementations (of f16), and compiler-rt (__floatuntisf)
correctly return +-Inf on overflow. And I can't think of any useful
transform that would take advantage of overflow being undefined here.

Differential Revision: https://reviews.llvm.org/D47807

llvm-svn: 334777

llvm/docs/LangRef.rst[diff]
llvm/lib/IR/ConstantFold.cpp[diff]
llvm/test/Transforms/ConstProp/cast.ll[diff]

3 files changed

tree: f50336563a7d7fe394368d5f5e555e7c3c099e46

clang/
clang-tools-extra/
compiler-rt/
debuginfo-tests/
libclc/
libcxx/
libcxxabi/
libunwind/
lld/
lldb/
llgo/
llvm/
openmp/
parallel-libs/
polly/
README.md

README.md

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.