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94473f4db6
Generate nuw GEPs for struct member accesses, as inbounds + non-negative implies nuw. Regression tests are updated using update scripts where possible, and by find + replace where not.
32 lines
1.8 KiB
C++
32 lines
1.8 KiB
C++
// RUN: %clang_cc1 -triple i686-windows-msvc -fms-extensions -emit-llvm -std=c++1y -O0 -o - %s | FileCheck %s
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struct Base {};
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// __declspec(dllexport) causes us to export the implicit constructor.
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struct __declspec(dllexport) Derived : virtual Base {
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// CHECK-LABEL: define weak_odr dso_local dllexport x86_thiscallcc noundef ptr @"??0Derived@@QAE@ABU0@@Z"
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// CHECK: %[[this:.*]] = load ptr, ptr {{.*}}
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// CHECK-NEXT: store ptr %[[this]], ptr %[[retval:.*]]
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// CHECK: %[[dest_a_gep:.*]] = getelementptr inbounds nuw %struct.Derived, ptr %[[this]], i32 0, i32 1
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// CHECK-NEXT: %[[src_load:.*]] = load ptr, ptr {{.*}}
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// CHECK-NEXT: %[[src_a_gep:.*]] = getelementptr inbounds nuw %struct.Derived, ptr %[[src_load:.*]], i32 0, i32 1
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %[[dest_a_gep]], ptr align 4 %[[src_a_gep]], i64 1, i1 false)
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// CHECK-NEXT: %[[dest_this:.*]] = load ptr, ptr %[[retval]]
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// CHECK-NEXT: ret ptr %[[dest_this]]
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bool a : 1;
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bool b : 1;
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};
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// __declspec(dllexport) causes us to export the implicit copy constructor.
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struct __declspec(dllexport) Derived2 : virtual Base {
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// CHECK-LABEL: define weak_odr dso_local dllexport x86_thiscallcc noundef ptr @"??0Derived2@@QAE@ABU0@@Z"
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// CHECK: %[[this:.*]] = load ptr, ptr {{.*}}
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// CHECK-NEXT: store ptr %[[this]], ptr %[[retval:.*]]
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// CHECK: %[[dest_a_gep:.*]] = getelementptr inbounds nuw %struct.Derived2, ptr %[[this]], i32 0, i32 1
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// CHECK-NEXT: %[[src_load:.*]] = load ptr, ptr {{.*}}
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// CHECK-NEXT: %[[src_a_gep:.*]] = getelementptr inbounds nuw %struct.Derived2, ptr %[[src_load:.*]], i32 0, i32 1
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 %[[dest_a_gep]], ptr align 4 %[[src_a_gep]], i32 4, i1 false)
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// CHECK-NEXT: %[[dest_this:.*]] = load ptr, ptr %[[retval]]
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// CHECK-NEXT: ret ptr %[[dest_this]]
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int Array[1];
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};
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