derek.holloway
7502bf64a4
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35 lines
851 B
C++
35 lines
851 B
C++
// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -fextend-variable-liveness=this -o - | FileCheck %s --implicit-check-not=fake.use
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// Check that we generate a fake_use call with the 'this' pointer as argument,
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// and no other fake uses.
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// The call should appear after the call to bar().
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void bar();
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class C
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{
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public:
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bool test(int p);
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C(int v): v(v) {}
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private:
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int v;
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};
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bool C::test(int p)
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{
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// CHECK-LABEL: define{{.*}}_ZN1C4testEi(ptr{{[^,]*}} %this, i32{{.*}} %p)
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// CHECK: %this.addr = alloca ptr
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// CHECK: store ptr %this, ptr %this.addr
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int res = p - v;
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bar();
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// CHECK: call{{.*}}bar
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return res != 0;
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// CHECK: [[FAKE_USE:%.+]] = load ptr, ptr %this.addr
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// CHECK-NEXT: call void (...) @llvm.fake.use(ptr{{.*}} [[FAKE_USE]])
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// CHECK-NEXT: ret
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}
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// CHECK: declare void @llvm.fake.use
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