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Tim Renouf ad8b7c1190 [AMDGPU] Fixed incorrect break from loop 
Summary:
Lower control flow did not correctly handle the case that a loop break
in if/else was on a condition that was not guaranteed to be masked by
exec. The first test kernel shows an example of this going wrong; after
exiting the loop, exec is all ones, even if it was not before the loop.

The fix is for lowering of if-break and else-break to insert an
S_AND_B64 to mask the break condition with exec. This commit also
includes the optimization of not inserting that S_AND_B64 if it is
obviously not needed because the break condition is the result of a
V_CMP in the same basic block.

V2: Addressed some review comments.
V3: Test fixes.

Subscribers: arsenm, kzhuravl, wdng, nhaehnle, yaxunl, dstuttard, t-tye, llvm-commits

Differential Revision: https://reviews.llvm.org/D44046

Change-Id: I0fc56a01209a9e99d1d5c9b0ffd16f111caf200c
llvm-svn: 333258
 		2018-05-25 07:55:04 +00:00
clang [x86] invpcid intrinsic 2018-05-25 06:34:42 +00:00
clang-tools-extra [clangd] Add clangDriver dependency after r333188 2018-05-24 15:54:32 +00:00
compiler-rt Revert "[libFuzzer] [NFC] Generalize DSO tests to work even when files are moved." 2018-05-25 07:18:29 +00:00
debuginfo-tests [Darwin] Specify DWARF 2/4 when running apple accelerator tests. 2018-02-26 20:56:45 +00:00
libclc Add initial support for half precision builtins 2018-05-17 22:55:30 +00:00
libcxx Add one more test for optional 2018-05-25 02:22:54 +00:00
libcxxabi private_typeinfo: limit is_dst_type_derived_from_static_type optimization 2018-05-18 20:51:38 +00:00
libunwind [OR1K] Add the EPCR special-purpose register to register state. 2018-05-16 19:09:48 +00:00
lld Fix regex in lld ppc64-ifunc test. 2018-05-24 17:07:16 +00:00
lldb HostInfoMacOSX: Support finding the clang resource directory within CLTools. 2018-05-25 00:29:01 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm [AMDGPU] Fixed incorrect break from loop 2018-05-25 07:55:04 +00:00
openmp [CUDA]Fix dynamic|guided scheduling. 2018-05-24 21:12:41 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [Acc] Followup for r333105: Fix one additional testcase 2018-05-24 10:18:09 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

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.