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Chandler Carruth 923ff550b9 [NewPM] Fix a nasty bug with analysis invalidation in the new PM. 
The issue here is that we actually allow CGSCC passes to mutate IR (and
therefore invalidate analyses) outside of the current SCC. At a minimum,
we need to support mutating parent and ancestor SCCs to support the
ArgumentPromotion pass which rewrites all calls to a function.

However, the analysis invalidation infrastructure is heavily based
around not needing to invalidate the same IR-unit at multiple levels.
With Loop passes for example, they don't invalidate other Loops. So we
need to customize how we handle CGSCC invalidation. Doing this without
gratuitously re-running analyses is even harder. I've avoided most of
these by using an out-of-band preserved set to accumulate the cross-SCC
invalidation, but it still isn't perfect in the case of re-visiting the
same SCC repeatedly *but* it coming off the worklist. Unclear how
important this use case really is, but I wanted to call it out.

Another wrinkle is that in order for this to successfully propagate to
function analyses, we have to make sure we have a proxy from the SCC to
the Function level. That requires pre-creating the necessary proxy.

The motivating test case now works cleanly and is added for
ArgumentPromotion.

Thanks for the review from Philip and Wei!

Differential Revision: https://reviews.llvm.org/D59869

llvm-svn: 357137
 		2019-03-28 00:51:36 +00:00
clang Revert "[WebAssembly] Don't use default GetLinkerPath" 2019-03-27 22:22:18 +00:00
clang-tools-extra [clang-tidy] Handle missing yaml module in run-clang-tidy.py 2019-03-27 19:21:32 +00:00
compiler-rt Revert "[builtins] Rounding mode support for addxf3/subxf3" 2019-03-27 04:18:37 +00:00
debuginfo-tests Set config.lit_tools_dir, which is needed by lit.llvm.initialize. 2018-11-06 21:54:27 +00:00
libclc travis: Add LLVM-8 build 2019-03-27 21:28:31 +00:00
libcxx Fix and speedup __libcpp_locale_guard on Windows 2019-03-27 18:09:30 +00:00
libcxxabi Revert "[runtimes] Move libunwind, libc++abi and libc++ to lib/ and include/" 2019-03-08 20:33:55 +00:00
libunwind Revert "[runtimes] Move libunwind, libc++abi and libc++ to lib/ and include/" 2019-03-08 20:33:55 +00:00
lld [ELF] Dump symbols ordered by profiled guided section layout to file. 2019-03-27 23:52:22 +00:00
lldb [Process] Reorder declarations and document ReadMemoryFromInferior. 2019-03-28 00:07:33 +00:00
llgo IR: Support parsing numeric block ids, and emit them in textual output. 2019-03-22 18:27:13 +00:00
llvm [NewPM] Fix a nasty bug with analysis invalidation in the new PM. 2019-03-28 00:51:36 +00:00
openmp [libomptarget] Introduce LIBOMPTARGET_ENABLE_DEBUG cmake option. 2019-03-26 15:19:15 +00:00
parallel-libs Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
polly [ConstantRange] Rename isWrappedSet() to isUpperWrapped() 2019-03-27 18:19:33 +00:00
pstl Restructure test suite to follow libc++ standard layout 2019-03-27 21:28:24 +00:00
.arcconfig Update monorepo .arcconfig with new project callsign. 2019-01-31 14:34:59 +00:00
.clang-format Add .clang-tidy and .clang-format files to the toplevel of the 2019-01-29 16:43:16 +00:00
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
README.md
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README.md

The LLVM Compiler Infrastructure

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.