6d0fab467e
If we look at class.bit p2 it tells us that that unnamed bit-fields are not members and class.compare.default p5 tells us that we should only compare non-static data members of the class. This fixes: https://github.com/llvm/llvm-project/issues/61335 and https://github.com/llvm/llvm-project/issues/61417 Differential Revision: https://reviews.llvm.org/D146329
45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
// RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux -emit-llvm -o - | FileCheck %s
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// GH61417
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// Check that we don't attempt to compare the unnamed bitfields
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struct A {
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unsigned x : 1;
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unsigned : 1;
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friend bool operator==(A, A);
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};
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struct B {
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unsigned x : 1;
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unsigned : 31;
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friend bool operator==(B, B);
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};
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bool operator==(A, A) = default;
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// CHECK: define{{.*}} @_Zeq1AS_
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// CHECK: %[[LHS:.+]] = alloca %struct.A, align 4
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// CHECK: %[[RHS:.+]] = alloca %struct.A, align 4
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// CHECK: %[[LHS_LOAD:.+]] = load i8, ptr %[[LHS]], align 4
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// CHECK: %[[LHS_CLEAR:.+]] = and i8 %[[LHS_LOAD]], 1
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// CHECK: %[[LHS_CAST:.+]] = zext i8 %[[LHS_CLEAR]] to i32
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// CHECK: %[[RHS_LOAD:.+]] = load i8, ptr %[[RHS]]
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// CHECK: %[[RHS_CLEAR:.+]] = and i8 %[[RHS_LOAD]], 1
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// CHECK: %[[RHS_CAST:.+]] = zext i8 %[[RHS_CLEAR]] to i32
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// CHECK: %[[CMP:.*]] = icmp eq i32 %[[LHS_CAST]], %[[RHS_CAST]]
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// CHECK: ret i1 %[[CMP]]
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bool operator==(B, B) = default;
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// CHECK: define{{.*}} @_Zeq1BS_
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// CHECK: %[[LHS_B:.+]] = alloca %struct.B, align 4
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// CHECK: %[[RHS_B:.+]] = alloca %struct.B, align 4
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// CHECK: %[[LHS_LOAD_B:.+]] = load i32, ptr %[[LHS_B]], align 4
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// CHECK: %[[LHS_CLEAR_B:.+]] = and i32 %[[LHS_LOAD_B]], 1
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// CHECK: %[[RHS_LOAD_B:.+]] = load i32, ptr %[[RHS_B]]
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// CHECK: %[[RHS_CLEAR_B:.+]] = and i32 %[[RHS_LOAD_B]], 1
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// CHECK: %[[CMP_B:.*]] = icmp eq i32 %[[LHS_CLEAR_B]], %[[RHS_CLEAR_B]]
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// CHECK: ret i1 %[[CMP_B]]
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