4461b69022
struct SuperEmpty { struct{ int a[0];} b;};
Such 0 sized structs in c++ mode can not be ignored in i386 for that c++
fields are never empty.But when EmitVAArg, its size is 0, so that
va_list not increase.Maybe we can just Ignore this kind of arguments,
like X86_64 did. Fix #86385.
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
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// RUN: %clang_cc1 -triple i386-linux-gnu -emit-llvm -o - %s | FileCheck %s
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typedef struct {} empty;
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// CHECK-LABEL: @_Z17empty_record_testiz(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[RESULT_PTR:%.*]] = alloca ptr, align 4
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// CHECK-NEXT: [[Z_ADDR:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[LIST:%.*]] = alloca ptr, align 4
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// CHECK-NEXT: store ptr [[AGG_RESULT:%.*]], ptr [[RESULT_PTR]], align 4
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// CHECK-NEXT: store i32 [[Z:%.*]], ptr [[Z_ADDR]], align 4
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// CHECK-NEXT: call void @llvm.va_start.p0(ptr [[LIST]])
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// CHECK-NEXT: ret void
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//
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empty empty_record_test(int z, ...) {
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__builtin_va_list list;
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__builtin_va_start(list, z);
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return __builtin_va_arg(list, empty);
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}
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typedef struct {
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struct {
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int a[0];
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} b;
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} SortOfEmpty;
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// CHECK-LABEL: @_Z18test_sort_of_emptyiz(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[RESULT_PTR:%.*]] = alloca ptr, align 4
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// CHECK-NEXT: [[Z_ADDR:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[LIST:%.*]] = alloca ptr, align 4
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// CHECK-NEXT: store ptr [[AGG_RESULT:%.*]], ptr [[RESULT_PTR]], align 4
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// CHECK-NEXT: store i32 [[Z:%.*]], ptr [[Z_ADDR]], align 4
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// CHECK-NEXT: call void @llvm.va_start.p0(ptr [[LIST]])
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// CHECK-NEXT: ret void
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//
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SortOfEmpty test_sort_of_empty(int z, ...) {
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__builtin_va_list list;
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__builtin_va_start(list, z);
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return __builtin_va_arg(list, SortOfEmpty);
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}
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