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| author | Thomas Lively <tlively@google.com> | 2019-10-15 19:05:11 +0000 |
|---|---|---|
| committer | Thomas Lively <tlively@google.com> | 2019-10-15 19:05:11 +0000 |
| commit | 190dacc3cc206fa90a44e2f4aa6b56c327d1942a (patch) | |
| tree | c6efda90caff32ebc4ad49c538b1bf2a020d2aa6 /lld/wasm/SyntheticSections.h | |
| parent | 0330fba6e16db9b5d2079313646f93485c5ccf39 (diff) | |
| download | bcm5719-llvm-190dacc3cc206fa90a44e2f4aa6b56c327d1942a.tar.gz bcm5719-llvm-190dacc3cc206fa90a44e2f4aa6b56c327d1942a.zip | |
[WebAssembly] Elide data segments for .bss sections
Summary:
WebAssembly memories are zero-initialized, so when module does not
import its memory initializing .bss sections is guaranteed to be a
no-op. To reduce binary size and initialization time, .bss sections
are simply not emitted into the final binary unless the memory is
imported.
Reviewers: sbc100
Subscribers: dschuff, jgravelle-google, aheejin, sunfish, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D68965
llvm-svn: 374940
Diffstat (limited to 'lld/wasm/SyntheticSections.h')
| -rw-r--r-- | lld/wasm/SyntheticSections.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/lld/wasm/SyntheticSections.h b/lld/wasm/SyntheticSections.h index 1557ce79d2d..23f9711dec1 100644 --- a/lld/wasm/SyntheticSections.h +++ b/lld/wasm/SyntheticSections.h @@ -250,9 +250,7 @@ protected: class DataCountSection : public SyntheticSection { public: - DataCountSection(uint32_t numSegments) - : SyntheticSection(llvm::wasm::WASM_SEC_DATACOUNT), - numSegments(numSegments) {} + DataCountSection(ArrayRef<OutputSegment *> segments); bool isNeeded() const override; void writeBody() override; |
