llvm-project.git/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp, branch main Unnamed repository; edit this file 'description' to name the repository. RuntimeLibcalls: Split lowering decisions into LibcallLoweringInfo (#164987) 2025-11-05T17:10:36+00:00 Matt Arsenault Matthew.Arsenault@amd.com 2025-11-05T17:10:36+00:00 056d2c12f75654b4b78c938a5243fa57efbd1547 Introduce a new class for the TargetLowering usage. This tracks the subtarget specific lowering decisions for which libcall to use. RuntimeLibcallsInfo is a module level property, which may have multiple implementations of a particular libcall available. This attempts to be a minimum boilerplate patch to introduce the new concept. In the future we should have a tablegen way of selecting which implementations should be used for a subtarget. Currently we do have some conflicting implementations added, it just happens to work out that the default cases to prefer is alphabetically first (plus some of these still are using manual overrides in TargetLowering constructors). 
Introduce a new class for the TargetLowering usage. This tracks the
subtarget specific lowering decisions for which libcall to use.
RuntimeLibcallsInfo is a module level property, which may have multiple
implementations of a particular libcall available. This attempts to be
a minimum boilerplate patch to introduce the new concept.

In the future we should have a tablegen way of selecting which
implementations should be used for a subtarget. Currently we
do have some conflicting implementations added, it just happens
to work out that the default cases to prefer is alphabetically
first (plus some of these still are using manual overrides
in TargetLowering constructors).
 Reapply "RuntimeLibcalls: Generate table of libcall name lengths (#153… (#153864) 2025-08-16T00:53:50+00:00 Matt Arsenault Matthew.Arsenault@amd.com 2025-08-16T00:28:06+00:00 3e5d8a1439afb784dee1a12a878fa0a533a6d4c6 This reverts commit 334e9bf2dd01fbbfe785624c0de477b725cde6f2. Check if llvm-nm exists before building the benchmark. 
This reverts commit 334e9bf2dd01fbbfe785624c0de477b725cde6f2.

Check if llvm-nm exists before building the benchmark.
Revert "RuntimeLibcalls: Generate table of libcall name lengths (#153… (#153864) 2025-08-15T20:32:27+00:00 gulfemsavrun gulfem@google.com 2025-08-15T20:32:27+00:00 334e9bf2dd01fbbfe785624c0de477b725cde6f2 …210)" This reverts commit 9a14b1d254a43dc0d4445c3ffa3d393bca007ba3. Revert "RuntimeLibcalls: Return StringRef for libcall names (#153209)" This reverts commit cb1228fbd535b8f9fe78505a15292b0ba23b17de. Revert "TableGen: Emit statically generated hash table for runtime libcalls (#150192)" This reverts commit 769a9058c8d04fc920994f6a5bbb03c8a4fbcd05. Reverted three changes because of a CMake error while building llvm-nm as reported in the following PR: https://github.com/llvm/llvm-project/pull/150192#issuecomment-3192223073 
…210)"

This reverts commit 9a14b1d254a43dc0d4445c3ffa3d393bca007ba3.

Revert "RuntimeLibcalls: Return StringRef for libcall names (#153209)"

This reverts commit cb1228fbd535b8f9fe78505a15292b0ba23b17de.

Revert "TableGen: Emit statically generated hash table for runtime
libcalls (#150192)"

This reverts commit 769a9058c8d04fc920994f6a5bbb03c8a4fbcd05.

Reverted three changes because of a CMake error while building llvm-nm
as reported in the following PR:
https://github.com/llvm/llvm-project/pull/150192#issuecomment-3192223073
 RuntimeLibcalls: Return StringRef for libcall names (#153209) 2025-08-15T00:55:39+00:00 Matt Arsenault Matthew.Arsenault@amd.com 2025-08-15T00:55:39+00:00 cb1228fbd535b8f9fe78505a15292b0ba23b17de Does not yet fully propagate this down into the TargetLowering uses, many of which are relying on null checks on the returned value. 
Does not yet fully propagate this down into the TargetLowering
uses, many of which are relying on null checks on the returned
value.
 WebAssembly: Stop directly using RuntimeLibcalls.def (#143054) 2025-06-20T00:35:02+00:00 Matt Arsenault Matthew.Arsenault@amd.com 2025-06-20T00:35:02+00:00 efd42b9b1d655a56abb3e6ce1ed4414e9f882912 Construct RuntimeLibcallsInfo instead of manually creating a map. This was repeating the setting of the RETURN_ADDRESS. This removes an obstacle to generating libcall information with tablegen. This is also not great, since it's setting a static map which would be broken if there were ever a triple with a different libcall configuration. 
Construct RuntimeLibcallsInfo instead of manually creating a map.
This was repeating the setting of the RETURN_ADDRESS. This removes
an obstacle to generating libcall information with tablegen.

This is also not great, since it's setting a static map which
would be broken if there were ever a triple with a different libcall
configuration.
 [aarch64] Fix Arm64EC libcall lowering after recent refactoring. (#143977) 2025-06-16T07:15:06+00:00 Eli Friedman efriedma@quicinc.com 2025-06-16T07:15:06+00:00 222ab28a9240e03479341cba2f487b8350635fce The refactored code accidentally tokenized a string instead of just concatenating it. Add a regression test and some assertions to ensure consistency. Fixes #143890 . 
The refactored code accidentally tokenized a string instead of just
concatenating it.

Add a regression test and some assertions to ensure consistency.

Fixes #143890 .
 [WebAssembly] Fix signatures of frexpf family of libcalls (#133289) 2025-03-31T17:20:40+00:00 Sam Clegg sbc@chromium.org 2025-03-31T17:20:40+00:00 42d1a1cb849195304dc93004f5808ef82904cd89 Fixes: https://github.com/emscripten-core/emscripten/issues/23997 
Fixes: https://github.com/emscripten-core/emscripten/issues/23997
 [WebAssembly] Add Libcall signatures for modf and variants (#130201) 2025-03-06T23:48:39+00:00 Derek Schuff dschuff@chromium.org 2025-03-06T23:48:39+00:00 6916438b65ee26ac75684dfceb4bdb7e87841ff7 Clang now lowers modf/modff/modfl as builtins using the llvm.modf intrinsic. 
Clang now lowers modf/modff/modfl as builtins using the llvm.modf
intrinsic.
 [CodeGen] Use __extendhfsf2 and __truncsfhf2 by default (#126880) 2025-02-19T09:16:57+00:00 Nikita Popov npopov@redhat.com 2025-02-19T09:16:57+00:00 cc539138acf742f53ef455147182a8de11980a02 The standard libcalls for half to float and float to half conversion are __extendhfsf2 and __truncsfhf2. However, LLVM currently uses __gnu_h2f_ieee and __gnu_f2h_ieee instead. As far as I can tell, these libcalls are an ARM-ism and only provided by libgcc on that platform. compiler-rt always provides both libcalls. Use the standard libcalls by default, and only use the __gnu libcalls on ARM. 
The standard libcalls for half to float and float to half conversion are
__extendhfsf2 and __truncsfhf2. However, LLVM currently uses
__gnu_h2f_ieee and __gnu_f2h_ieee instead. As far as I can tell, these
libcalls are an ARM-ism and only provided by libgcc on that platform.
compiler-rt always provides both libcalls.

Use the standard libcalls by default, and only use the __gnu libcalls on
ARM.
 [WebAssembly] Remove unused includes (NFC) (#116318) 2024-11-15T15:26:37+00:00 Kazu Hirata kazu@google.com 2024-11-15T15:26:37+00:00 43570a2841e2a8f1efd00503beee751cc1e72513 Identified with misc-include-cleaner. 
Identified with misc-include-cleaner.