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Hongtao Yu f10d38ed6b [ICP] Handling must tail calls in indirect call promotion 
Per the IR convention, a musttail call must precede a ret with an optional bitcast. This was violated by the indirect call promotion optimization which could result an IR like:

    ; <label>:2192:
      br i1 %2198, label %2199, label %2201, !dbg !226012, !prof !229483

    ; <label>:2199:                                   ; preds = %2192
      musttail call fastcc void @foo(i8* %2195), !dbg !226012
      br label %2202, !dbg !226012

    ; <label>:2201:                                   ; preds = %2192
      musttail call fastcc void %2197(i8* %2195), !dbg !226012
      br label %2202, !dbg !226012

    ; <label>:2202:                                   ; preds = %605, %2201, %2199
      ret void, !dbg !229485

This is being fixed in this change where the return statement goes together with the promoted indirect call. The code generated is like:

    ; <label>:2192:
      br i1 %2198, label %2199, label %2201, !dbg !226012, !prof !229483

    ; <label>:2199:                                   ; preds = %2192
      musttail call fastcc void @foo(i8* %2195), !dbg !226012
      ret void, !dbg !229485

    ; <label>:2201:                                   ; preds = %2192
      musttail call fastcc void %2197(i8* %2195), !dbg !226012
      ret void, !dbg !229485

Differential Revision: https://reviews.llvm.org/D79258
2020-05-03 10:42:22 -07:00
benchmarks
bindings Update go bindings for 2dea3f129878e929e5d1f00b91a622eb1ec8be4e 2020-04-22 19:02:59 +02:00
cmake [CMake] Provide a proper default location for llvm-lit for out-of-tree users on Windows host. 2020-05-01 11:48:30 -07:00
docs [docs][FileCheck] Fix invalid example 2020-05-02 23:31:18 +01:00
examples [examples] Fix an incomplete comment. 2020-05-01 11:06:41 -07:00
include [Attributor][NFC] Encode IRPositions in the bits of a single pointer 2020-05-03 12:15:19 -05:00
lib [ICP] Handling must tail calls in indirect call promotion 2020-05-03 10:42:22 -07:00
projects Add few docs and implementation of strcpy and strcat. 2019-10-04 17:30:54 +00:00
resources
runtimes [runtimes] When COMPILER_RT is enabled, consider SANITIZER prefixes 2020-03-11 14:22:20 -07:00
test [ICP] Handling must tail calls in indirect call promotion 2020-05-03 10:42:22 -07:00
tools Don't stash types that aren't copyable or moveable into a SmallVector 2020-05-02 19:13:06 +02:00
unittests Revert "Optimize path::remove_dots" 2020-05-03 12:46:46 -04:00
utils [gn build] Port e64f99c51a8 2020-05-03 12:08:26 +00:00
.clang-format
.clang-tidy - Update .clang-tidy to ignore parameters of main like functions for naming violations in clang and llvm directory 2020-01-31 16:49:45 +00:00
.gitattributes Fix the "git modified" issue on the preserve-comments-crlf.s. 2019-09-10 12:17:49 +00:00
.gitignore Continue removing llgo. 2020-02-10 10:33:58 -08:00
CMakeLists.txt Revert "Temporarily revert "build: use find_package(Python3) if available"" 2020-04-29 01:38:08 +00:00
CODE_OWNERS.TXT Remove myself from CODE_OWNERS. 2020-02-25 11:59:29 +00:00
configure
CREDITS.TXT Update email address. 2019-07-17 07:02:02 +00:00
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
llvm.spec.in Update structured references to the license to the new license. 2019-01-19 11:30:51 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +00:00

README.txt 

The LLVM Compiler Infrastructure
================================

This directory and its subdirectories contain source code for LLVM,
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LLVM is open source software. You may freely distribute it under the terms of
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Please see the documentation provided in docs/ for further
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