6cee539337
Clang is generating different mangled names for the same lambda function in slightly changed builds (like with non-related source/Macro change). This is due to the fact that clang uses a cross-translation-unit sequential string "$_<n>" in lambda's mangled name. Here, "n" is the AnonStructIds field in MangleContext. Different mangled names for a unchanged function is undesirable: it makes perf comparison harder, and can cause some unnecessary profile mismatch in SampleFDO. This patch makes mangled name for lambda functions more stable by changing AnonStructIds to a per-function based seq number if the DeclContext is a function. Differential Revision: https://reviews.llvm.org/D136397
44 lines
1.8 KiB
Plaintext
44 lines
1.8 KiB
Plaintext
// RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-apple-macosx10.12.0 -emit-llvm -disable-llvm-passes -O3 -fblocks -fobjc-arc -fobjc-runtime-has-weak -std=c++11 -o - %s | FileCheck %s
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void test0(id x) {
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extern void test0_helper(id (^)(void));
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test0_helper([=]() { return x; });
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// CHECK-LABEL: define internal noundef i8* @___Z5test0P11objc_object_block_invoke
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// CHECK: [[T0:%.*]] = call noundef i8* @"_ZZ5test0P11objc_objectENK3$_0clEv"{{.*}} [ "clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
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// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(i8* [[T0]])
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// CHECK-NEXT: [[T2:%.*]] = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* [[T0]])
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// CHECK-NEXT: ret i8* [[T2]]
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}
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// Check that the delegating block invoke function doesn't destruct the Weak
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// object that is passed.
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// CHECK-LABEL: define internal void @___Z8testWeakv_block_invoke(
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// CHECK: call void @"_ZZ8testWeakvENK3$_0clE4Weak"(
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// CHECK-NEXT: ret void
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// CHECK-LABEL: define internal void @"_ZZ8testWeakvENK3$_0clE4Weak"(
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// CHECK: call void @_ZN4WeakD1Ev(
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// CHECK-NEXT: ret void
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id test1_rv;
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void test1() {
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extern void test1_helper(id (*)(void));
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test1_helper([](){ return test1_rv; });
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// CHECK-LABEL: define internal noundef i8* @"_ZZ5test1vEN3$_08__invokeEv"
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// CHECK: [[T0:%.*]] = call noundef i8* @"_ZZ5test1vENK3$_0clEv"{{.*}} [ "clang.arc.attachedcall"(i8* (i8*)* @llvm.objc.retainAutoreleasedReturnValue) ]
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// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(i8* [[T0]])
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// CHECK-NEXT: [[T2:%.*]] = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* [[T0]])
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// CHECK-NEXT: ret i8* [[T2]]
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}
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struct Weak {
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__weak id x;
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};
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void testWeak() {
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extern void testWeak_helper(void (^)(Weak));
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testWeak_helper([](Weak){});
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}
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