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Mirror of https://github.com/RPCS3/llvm-mirror
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Alexander Ivchenko 1e41ef36f6 [GlobalISel][X86] Support G_LSHR/G_ASHR/G_SHL 
Support G_LSHR/G_ASHR/G_SHL. We have 3 variance for
shift instructions : shift gpr, shift imm, shift 1.
Currently GlobalIsel TableGen generate patterns for
shift imm and shift 1, but with shiftCount i8.
In G_LSHR/G_ASHR/G_SHL like LLVM-IR both arguments
has the same type, so for now only shift i8 can use
auto generated TableGen patterns.

The support of G_SHL/G_ASHR enables tryCombineSExt
from LegalizationArtifactCombiner.h to hit, which
results in different legalization for the following tests:
    LLVM :: CodeGen/X86/GlobalISel/ext-x86-64.ll
    LLVM :: CodeGen/X86/GlobalISel/gep.ll
    LLVM :: CodeGen/X86/GlobalISel/legalize-ext-x86-64.mir

-; X64-NEXT:    movsbl %dil, %eax
+; X64-NEXT:    movl $24, %ecx
+; X64-NEXT:    # kill: def $cl killed $ecx
+; X64-NEXT:    shll %cl, %edi
+; X64-NEXT:    movl $24, %ecx
+; X64-NEXT:    # kill: def $cl killed $ecx
+; X64-NEXT:    sarl %cl, %edi
+; X64-NEXT:    movl %edi, %eax

..which is not optimal and should be addressed later.

Rework of the patch by igorb

Reviewed By: igorb

Differential Revision: https://reviews.llvm.org/D44395

llvm-svn: 327499
2018-03-14 11:23:57 +00:00
bindings Because of CVE-2018-6574, some compiler options and linker options are restricted to prevent arbitrary code execution. 2018-02-23 20:12:24 +00:00
cmake Export LLVM_DYLIB_COMPONENTS in LLVMConfig.cmake 2018-03-14 09:28:38 +00:00
docs TableGen: Add !ne, !le, !lt, !ge, and !gt comparisons 2018-03-14 11:00:57 +00:00
examples [ORC] Consolidate RTDyldObjectLinkingLayer GetMemMgr and GetResolver into a 2018-02-14 22:13:02 +00:00
include TableGen: Add !ne, !le, !lt, !ge, and !gt comparisons 2018-03-14 11:00:57 +00:00
lib [GlobalISel][X86] Support G_LSHR/G_ASHR/G_SHL 2018-03-14 11:23:57 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
runtimes [CMake] Support for cross-compilation when build runtimes 2018-01-08 23:50:59 +00:00
test [GlobalISel][X86] Support G_LSHR/G_ASHR/G_SHL 2018-03-14 11:23:57 +00:00
tools DWARF: Unify form size handling code 2018-03-14 09:39:54 +00:00
unittests DWARF: Unify form size handling code 2018-03-14 09:39:54 +00:00
utils [lit] - Allow 1 test to report multiple micro-test results to provide support for microbenchmarks. 2018-03-13 16:37:59 +00:00
.arcconfig [llvm] Set up .arcconfig to point to Diffusion L repository 2018-01-12 15:37:41 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitattributes [MC] Fix regression tests on Windows when git “core.autocrlf” is set to true. 2017-11-17 21:59:43 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt build: add the ability to create a symlink for dsymutil 2018-02-28 23:00:50 +00:00
CODE_OWNERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Add myself to CREDITS.txt 2018-01-29 17:02:34 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
README.txt Test commit access 2017-08-18 02:39:28 +00:00
RELEASE_TESTERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00

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