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Craig Topper 0a8fb0b4d7 [RISCV] Custom lower (i32 (fptoui/fptosi X)).
I stumbled onto a case where our (sext_inreg (assertzexti32 (fptoui X)), i32)
isel pattern can cause an fcvt.wu and fcvt.lu to be emitted if
the assertzexti32 has an additional user. If we add a one use check
it would just cause a fcvt.lu followed by a sext.w when only need
a fcvt.wu to satisfy both users.

To mitigate this I've added custom isel and new ISD opcodes for
fcvt.wu. This allows us to keep know it started life as a conversion
to i32 without needing to match multiple nodes. ComputeNumSignBits
has been taught that this new nodes produces 33 sign bits. To
prevent regressions when we need to zero extend the result of an
(i32 (fptoui X)), I've added a DAG combine to convert it to an
(i64 (fptoui X)) before type legalization. In most cases this would
happen in InstCombine, but a zero_extend can be created for function
returns or arguments.

To keep everything consistent I've added new nodes for fptosi as well.

Reviewed By: luismarques

Differential Revision: https://reviews.llvm.org/D106346
2021-07-24 10:50:43 -07:00
benchmarks
bindings [IR] Rename comdat noduplicates to comdat nodeduplicate 2021-07-20 12:47:10 -07:00
cmake [CMake] Add LIBXML2_DEFINITIONS when testing for symbol existance 2021-07-24 09:55:14 +02:00
docs [LangRef] Clarify comdat 2021-07-23 16:33:06 -07:00
examples Opaque pointer GEP fixes for BrainF example 2021-07-18 18:25:54 -07:00
include [ADT] Remove WrappedPairNodeDataIterator (NFC) 2021-07-24 08:02:57 -07:00
lib [RISCV] Custom lower (i32 (fptoui/fptosi X)). 2021-07-24 10:50:43 -07:00
projects [RFC][debuginfo-test] Rename debug-info lit tests for general purposes 2021-06-28 11:31:40 +01:00
resources
runtimes [runtimes] Fix umbrella component targets 2021-06-12 19:49:44 -07:00
test [RISCV] Custom lower (i32 (fptoui/fptosi X)). 2021-07-24 10:50:43 -07:00
tools [llvm-rc] Allow dashes as part of resource name strings 2021-07-23 23:05:20 +03:00
unittests [Attributor][FIX] checkForAllInstructions, correctly handle declarations 2021-07-24 02:21:29 +03:00
utils [gn build] Port 6aa9e746ebde 2021-07-24 12:03:50 +00:00
.clang-format
.clang-tidy NFC: .clang-tidy: Inherit configs from parents to improve maintainability 2021-06-08 08:25:59 -07:00
.gitattributes Fix the "git modified" issue on the preserve-comments-crlf.s. 2019-09-10 12:17:49 +00:00
.gitignore Remove .gitignore entries not relevant in the monorepo. 2021-04-07 12:25:02 -07:00
CMakeLists.txt [MLGO] Strip TF_PIP cmake variable 2021-07-22 16:28:13 -07:00
CODE_OWNERS.TXT [NFC] Update code owners file 2021-07-20 11:29:10 -07:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Update personal info in CREDITS.TXT 2021-04-11 19:25:02 +08:00
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
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

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