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Craig Topper 74d1af9d27 [X86] Add FPCW as a register and start using it as an implicit use on floating point instructions. 
Summary:
FPCW contains the rounding mode control which we manipulate to implement fp to integer conversion by changing the roudning mode, storing the value to the stack, and then changing the rounding mode back. Because we didn't model FPCW and its dependency chain, other instructions could be scheduled into the middle of the sequence.

This patch introduces the register and adds it as an implciit def of FLDCW and implicit use of the FP binary arithmetic instructions and store instructions. There are more instructions that need to be updated, but this is a good start. I believe this fixes at least the reduced test case from PR40529.

Reviewers: RKSimon, spatel, rnk, efriedma, andrew.w.kaylor

Subscribers: dim, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57735

llvm-svn: 353489
2019-02-08 00:44:39 +00:00
benchmarks Pull google/benchmark library to the LLVM tree 2018-08-28 09:42:41 +00:00
bindings Fix format string in bindings/go/llvm/ir_test.go (PR40561) 2019-02-05 11:01:54 +00:00
cmake [cmake] Pass LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN to NATIVE configure 2019-02-07 20:58:04 +00:00
docs Bump minimum toolchain version 2019-02-07 05:20:00 +00:00
examples Fix compilation of examples after 13680223b9d8 / r352827 2019-02-01 03:23:42 +00:00
include [WebAssembly] Fix imported function symbol names that differ from their import names in the .o format 2019-02-07 22:03:32 +00:00
lib [X86] Add FPCW as a register and start using it as an implicit use on floating point instructions. 2019-02-08 00:44:39 +00:00
projects Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
resources
runtimes Revert "[CMake] Use __libc_start_main rather than fopen when checking for C library" 2019-01-28 19:26:41 +00:00
test [X86] Add FPCW as a register and start using it as an implicit use on floating point instructions. 2019-02-08 00:44:39 +00:00
tools [WebAssembly] Fix imported function symbol names that differ from their import names in the .o format 2019-02-07 22:03:32 +00:00
unittests GlobalISel: Try to make legalize rules more useful for vectors 2019-02-07 17:25:51 +00:00
utils gn build: Make check-{clang,lld,llvm} pass on FreeBSD. 2019-02-07 21:24:30 +00:00
.arcconfig [llvm] Set up .arcconfig to point to Diffusion L repository 2018-01-12 15:37:41 +00:00
.clang-format
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
.gitignore gitignore: ignore clangd index files. 2019-01-25 14:05:18 +00:00
CMakeLists.txt Bump minimum toolchain version 2019-02-07 05:20:00 +00:00
CODE_OWNERS.TXT [llvm-mca] Move llvm-mca library to llvm/lib/MCA. 2018-12-17 08:08:31 +00:00
configure
CREDITS.TXT Remove a period from CREDITS.TXT (testing email change). NFC 2019-01-19 09:07:38 +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. 2018-09-22 01:01:03 +00:00
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +00:00

README.txt 

The LLVM Compiler Infrastructure
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