ebe8733a11
Removes the MaterializationResponsibility::addDependencies and addDependenciesForAll methods, and transfers dependency registration to the notifyEmitted operation. The new dependency registration allows dependencies to be specified for arbitrary subsets of the MaterializationResponsibility's symbols (rather than just single symbols or all symbols) via an array of SymbolDependenceGroups (pairs of symbol sets and corresponding dependencies for that set). This patch aims to both improve emission performance and simplify dependence tracking. By eliminating some states (e.g. symbols having registered dependencies but not yet being resolved or emitted) we make some errors impossible by construction, and reduce the number of error cases that we need to check. NonOwningSymbolStringPtrs are used for dependence tracking under the session lock, which should reduce ref-counting operations, and intra-emit dependencies are resolved outside the session lock, which should provide better performance when JITing concurrently (since some dependence tracking can happen in parallel). The Orc C API is updated to account for this change, with the LLVMOrcMaterializationResponsibilityNotifyEmitted API being modified and the LLVMOrcMaterializationResponsibilityAddDependencies and LLVMOrcMaterializationResponsibilityAddDependenciesForAll operations being removed.
40 lines
1.2 KiB
ArmAsm
40 lines
1.2 KiB
ArmAsm
# REQUIRES: asserts
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# RUN: llvm-mc -triple=x86_64-apple-macosx10.9 -filetype=obj -o %t %s
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# RUN: llvm-jitlink -debug-only=orc -noexec -abs _external_func=0x1 \
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# RUN: -entry=_foo %t 2>&1 | FileCheck %s
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#
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# Check that simplification eliminates dependencies on symbols in this unit,
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# and correctly propagates dependencies on symbols outside the unit (including
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# via locally scoped symbols). In this test _baz depends on _foo indirectly via
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# the local symbol _bar. Initially we expect _baz to depend on _foo, and _foo
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# on _external_func, after simplification we expect both to depend on
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# _external_func only.
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# CHECK: In main emitting {{.*}}_foo{{.*}}
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# CHECK-NEXT: Initial dependencies:
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# CHECK-DAG: Symbols: { _foo }, Dependencies: { (main, { _external_func }) }
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# CHECK-DAG: Symbols: { _baz }, Dependencies: { (main, { _foo }) }
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# CHECK: Simplified dependencies:
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# CHECK-DAG: Symbols: { _foo }, Dependencies: { (main, { _external_func }) }
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# CHECK-DAG: Symbols: { _baz }, Dependencies: { (main, { _external_func }) }
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.section __TEXT,__text,regular,pure_instructions
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.globl _foo
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.p2align 4, 0x90
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_foo:
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jmp _external_func
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.p2align 4, 0x90
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_bar:
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jmp _foo
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.globl _baz
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.p2align 4, 0x90
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_baz:
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jmp _bar
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.subsections_via_symbols
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