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Clemens Backes 6b2dc157d4 [wasm] Assume positive stack offsets 
The stack offsets of cache slots are always positive, but the compiler
does not know that. The lack of this knowledge makes division by the
system pointer size significantly more expensive.

One solution would be to rewrite the division to be an actual right
shift. Another solution is to teach the compiler that offsets are
positive. This CL does the latter.

This reduces the overall Liftoff compile time of the reproducer in the
linked issue by nearly 25%.

R=jkummerow@chromium.org, cbruni@chromium.org

Bug: v8:13063
Change-Id: Ib55b35d407e9909c792ae095a6767aaa03faebdc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3760453
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81778}
2022-07-18 13:24:53 +00:00
..
cppgc cppgc: Fix name trait for gcc and msvc 2022-07-18 09:38:22 +00:00
libplatform [api] Advance API deprecation for methods last changed in v9.7 2022-01-26 17:30:21 +00:00
APIDesign.md Move inspector protocol definitions to include/ 2019-06-18 17:59:36 +00:00
DEPS cppgc: Implement process-global state accessors. 2021-02-17 22:37:24 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
js_protocol-1.2.json Move inspector protocol definitions to include/ 2019-06-18 17:59:36 +00:00
js_protocol-1.3.json Move inspector protocol definitions to include/ 2019-06-18 17:59:36 +00:00
js_protocol.pdl Reland "[inspector] Allow Debugger.setScriptSource to edit top-most function" 2022-06-15 07:48:30 +00:00
OWNERS [owners] Adjust ownership for v8-debug.h. 2021-12-30 08:04:21 +00:00
v8-array-buffer.h [api] Add more efficient API for accesssing ArrayBuffer raw data 2022-07-15 09:03:11 +00:00
v8-callbacks.h [wasm][api] Introduce API to let the embedder resolve wasm promises 2022-06-14 11:41:22 +00:00
v8-container.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-context.h [sandbox] Prepare ExternalPointerTable rollout 2022-07-11 13:34:54 +00:00
v8-cppgc.h [heap] Split off changes for concurrently processing TracedReference 2022-04-08 13:08:05 +00:00
v8-data.h [api] Introduce new HostImportModuleDynamicallyCallback 2021-11-05 14:35:43 +00:00
v8-date.h Fix Date BiDi format 2022-07-11 17:19:43 +00:00
v8-debug.h Introduce v8::StackTrace::CurrentScriptNameOrSourceURL 2022-01-17 11:34:28 +00:00
v8-embedder-heap.h [api] Rename isolate variables 2022-04-28 12:51:08 +00:00
v8-embedder-state-scope.h Shift EmbedderState values next to each other 2022-01-10 17:43:47 +00:00
v8-exception.h [api] Rename isolate variables 2022-04-28 12:51:08 +00:00
v8-extension.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-external.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-fast-api-calls.h [fastcall] expose wasm memory to cfunction 2022-07-05 16:24:01 +00:00
v8-forward.h [include] Add TryCatch and Extension to v8-forward.h 2021-09-23 13:15:10 +00:00
v8-function-callback.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-function.h [api] Deprecate v8::ScriptCompiler::CompileFunctionInContext 2021-10-27 07:19:51 +00:00
v8-initialization.h [sandbox] Initialize sandbox during V8::Initialize 2022-07-15 09:29:32 +00:00
v8-inspector-protocol.h Fix LINT exceptions across the code base 2020-04-27 16:37:04 +00:00
v8-inspector.h Distinguish untrusted clients in v8 inspector and disable Profiler, HeapProfiler and Schema CDP domains for them. 2022-05-03 12:38:17 +00:00
v8-internal.h [sandbox] Initialize sandbox during V8::Initialize 2022-07-15 09:29:32 +00:00
v8-isolate.h [wasm][api] Introduce API to let the embedder resolve wasm promises 2022-06-14 11:41:22 +00:00
v8-json.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-local-handle.h [api] Fix MaybeLocal::ToLocal documentation when it's empty 2022-05-03 10:03:24 +00:00
v8-locker.h [api] Advance API deprecation for V8 version v10.2 2022-05-03 12:16:28 +00:00
v8-maybe.h api: Allow v8::Maybe<MovableType>. 2022-04-30 21:47:24 +00:00
v8-memory-span.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-message.h [api] Advance API deprecation for V8 version v10.2 2022-05-03 12:16:28 +00:00
v8-metrics.h [wasm] Remove sampling on top tier finished 2022-05-31 16:20:58 +00:00
v8-microtask-queue.h [api] Rename isolate variables 2022-04-28 12:51:08 +00:00
v8-microtask.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-object.h [sandbox] Prepare ExternalPointerTable rollout 2022-07-11 13:34:54 +00:00
v8-persistent-handle.h [api] Remove deprecated global handle APIs 2022-06-09 15:39:03 +00:00
v8-platform.h [task] Expose CreateJob in v8::Platform 2022-06-15 00:13:31 +00:00
v8-primitive-object.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-primitive.h [sandbox] Turn ExternalPointerTag into a template parameter 2022-06-27 13:45:20 +00:00
v8-profiler.h [logging] Use short "JS:" prefix for function log events 2022-06-14 16:11:21 +00:00
v8-promise.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-proxy.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-regexp.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-script.h Allow embedder to provide source text during code cache deserialization 2022-06-28 16:18:20 +00:00
v8-snapshot.h Remove many superfluous STL includes in headers. 2022-01-13 20:56:45 +00:00
v8-statistics.h [api][profiler] Surface CpuProfiler memory in HeapCodeStatistics 2021-11-04 11:01:09 +00:00
v8-template.h [api] Add more comments about interceptor callbacks 2022-05-25 11:38:44 +00:00
v8-traced-handle.h [api] Remove TracedGlobal<> 2022-03-23 21:04:51 +00:00
v8-typed-array.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-unwinder-state.h [LOONG64] Add LoongArch64 backend 2021-08-16 13:05:19 +00:00
v8-unwinder.h Reland "[profiler] Surface VM & Embedder State" 2021-12-07 19:00:07 +00:00
v8-util.h [api] Deprecate PersistentValueVector 2022-06-09 08:44:13 +00:00
v8-value-serializer-version.h Reland^2 "[string] Support shared strings in Value{Serializer,Deserializer}" 2022-01-26 21:00:12 +00:00
v8-value-serializer.h Reland^2 "[string] Support shared strings in Value{Serializer,Deserializer}" 2022-01-26 21:00:12 +00:00
v8-value.h Reland "[include] Split out v8.h" 2021-08-24 13:08:55 +00:00
v8-version-string.h Fix LINT exceptions across the code base 2020-04-27 16:37:04 +00:00
v8-version.h Version 10.5.0.2 2022-06-09 11:02:42 +00:00
v8-wasm-trap-handler-posix.h Fix LINT exceptions across the code base 2020-04-27 16:37:04 +00:00
v8-wasm-trap-handler-win.h Fix LINT exceptions across the code base 2020-04-27 16:37:04 +00:00
v8-wasm.h [wasm] Remove WasmModuleObjectBulderStreaming 2022-06-28 18:17:37 +00:00
v8-weak-callback-info.h [api] Remove APIs for resurrecting finalizers 2022-04-21 07:05:25 +00:00
v8.h Remove many superfluous STL includes in headers. 2022-01-13 20:56:45 +00:00
v8config.h [wasm] Assume positive stack offsets 2022-07-18 13:24:53 +00:00