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David Bolvansky ff0ad3c43d [InstCombine] mempcpy(d,s,n) to memcpy(d,s,n) + n 
Summary:
Back-end currently expands mempcpy, but middle-end should work with memcpy instead of mempcpy to enable more memcpy-optimization.

GCC backend emits mempcpy, so LLVM backend could form it too, if we know mempcpy libcall is better than memcpy + n.
https://godbolt.org/z/dOCG96

Reviewers: efriedma, spatel, craig.topper, RKSimon, jdoerfert

Reviewed By: efriedma

Subscribers: hjl.tools, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65737

llvm-svn: 370593
 		2019-08-31 18:19:05 +00:00
clang Revert [Clang Interpreter] Initial patch for the constexpr interpreter 2019-08-31 15:15:39 +00:00
clang-tools-extra Make add_new_check.py's insertion of registerCheck<> match the sort order 2019-08-30 20:47:02 +00:00
compiler-rt [cmake] enable x86 libfuzzer on Windows 2019-08-29 17:47:43 +00:00
debuginfo-tests Make nrvo-string test more robust. 2019-06-27 20:38:37 +00:00
libclc Revert "Rename F_{None,Text,Append} to OF_{None,Text,Append}. NFC" 2019-08-05 17:23:23 +00:00
libcxx Revert "Add gdb pretty printers for a wide variety of libc++ data structures." 2019-08-31 00:00:34 +00:00
libcxxabi Provide a meaningful diagnostic when LLVM_PATH doesn't point to a directory 2019-08-19 23:51:26 +00:00
libunwind [runtimes] Don't depend on libpthread on Android 2019-07-22 20:41:03 +00:00
lld Revert "[lld-link] implement -start-lib and -end-lib" 2019-08-30 23:24:41 +00:00
lldb [lldb] Unify target checking in CommandObject 2019-08-31 09:41:25 +00:00
llgo IR: Support parsing numeric block ids, and emit them in textual output. 2019-03-22 18:27:13 +00:00
llvm [InstCombine] mempcpy(d,s,n) to memcpy(d,s,n) + n 2019-08-31 18:19:05 +00:00
openmp Use target_impl functions to replace more inline asm 2019-08-28 15:04:06 +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 [DependenceInfo] Compute WAR dependence info using ISL kills. NFC. 2019-08-29 18:55:55 +00:00
pstl [pstl] Allow customizing whether per-TU insulation is provided 2019-08-13 12:49:00 +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
.gitignore Change /build to /build* in top-level .gitignore. 2019-08-02 02:14:08 +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.