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Nicolai Haehnle b219464fb0 InstCombine/AMDGPU: Add dimension-aware image intrinsics to SimplifyDemanded
Summary:
Use the expanded features of the TableGen generic tables to avoid manually
adding the combinatorially exploded set of intrinsics. The
getAMDGPUImageDimIntrinsic lookup function is early-out,
i.e. non-AMDGPU intrinsics will never look at the underlying table.

Use a generic approach for getting the new intrinsic overload to keep the
code simple, and make the image dmask handling more generic:
- handle non-sampler image loads
- handle the case where the set of demanded elements is not a prefix

There is some overlap between this code and an optimization that happens
in the backend during code generation. They currently complement each other:

- only the codegen optimization can generate vec3 loads
- only the InstCombine optimization can handle D16

The InstCombine optimization also likely covers more cases since the
codegen optimization is fairly ad-hoc. Ideally, we'll remove the optimization
in codegen once the infrastructure for vec3 is in place (which will probably
take a long time).

Modify the test cases to use dimension-aware intrinsics. This makes it
easier to see that the test coverage for the new intrinsics is equivalent,
and the old style intrinsics will be removed in a follow-up commit anyway.

Change-Id: I4b91ea661413d13004956fe4ef7d13d41b8ce3ad

Reviewers: arsenm, rampitec, majnemer

Subscribers: kzhuravl, wdng, mgorny, yaxunl, dstuttard, tpr, t-tye, llvm-commits

Differential Revision: https://reviews.llvm.org/D48165

llvm-svn: 335230
2018-06-21 13:37:31 +00:00
bindings [LLVM-C] [OCaml] Remove LLVMAddBBVectorizePass 2018-05-28 16:58:10 +00:00
cmake [cmake] Change ON/OFF to YES/NO. NFC 2018-06-14 23:40:04 +00:00
docs TableGen/SearchableTables: Support more generic enums and tables 2018-06-21 13:36:22 +00:00
examples [ORC] Update JITCompileCallbackManager to support multi-threaded code. 2018-05-30 01:57:45 +00:00
include InstCombine/AMDGPU: Add dimension-aware image intrinsics to SimplifyDemanded 2018-06-21 13:37:31 +00:00
lib InstCombine/AMDGPU: Add dimension-aware image intrinsics to SimplifyDemanded 2018-06-21 13:37:31 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources
runtimes [CMake] Pass additional CMake tools to external projects 2018-06-06 21:43:37 +00:00
test InstCombine/AMDGPU: Add dimension-aware image intrinsics to SimplifyDemanded 2018-06-21 13:37:31 +00:00
tools [llvm-mca] Updates comment in code, and remove some stale comments. NFC 2018-06-21 12:14:49 +00:00
unittests [llvm-exegesis] Add mechanism to add target-specific passes. 2018-06-20 11:54:35 +00:00
utils TableGen/SearchableTables: Support more generic enums and tables 2018-06-21 13:36:22 +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
.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt [CMake] Handle 'libtool' being at a path with spaces in it. 2018-06-13 18:21:47 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take ownership of the MIPS backend 2018-06-21 09:59:44 +00:00
configure
CREDITS.TXT Update my information in the CREDITS file. 2018-06-15 20:02:11 +00:00
LICENSE.TXT Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit: remove a blank line 2018-06-08 21:21:55 +00:00
RELEASE_TESTERS.TXT Remove myself from the release testers list. (NFC) 2018-06-20 21:25:50 +00:00

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