830a74092a
Handling of va_list on Cygwin environment must be matched to normal Windows environment. The existing test `test/CodeGen/ms_abi.c` seems relevant, but it contains `__attribute__((sysv_abi))`, which is not supported on Cygwin. The new test is based on the `__attribute__((ms_abi))` portion of that test. --------- Co-authored-by: jeremyd2019 <github@jdrake.com>
36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
// RUN: %clang_cc1 -triple x86_64-windows-gnu -emit-llvm < %s | FileCheck %s
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// RUN: %clang_cc1 -triple x86_64-pc-cygwin -emit-llvm < %s | FileCheck %s
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struct foo {
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int x;
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float y;
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char z;
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};
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// CHECK: %[[STRUCT_FOO:.*]] = type { i32, float, i8 }
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void f(int a, ...) {
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// CHECK-LABEL: define dso_local void @f
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__builtin_va_list ap;
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__builtin_va_start(ap, a);
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// CHECK: %[[AP:.*]] = alloca ptr
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// CHECK: call void @llvm.va_start
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int b = __builtin_va_arg(ap, int);
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// CHECK: %[[AP_CUR:.*]] = load ptr, ptr %[[AP]]
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// CHECK-NEXT: %[[AP_NEXT:.*]] = getelementptr inbounds i8, ptr %[[AP_CUR]], i64 8
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// CHECK-NEXT: store ptr %[[AP_NEXT]], ptr %[[AP]]
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double _Complex c = __builtin_va_arg(ap, double _Complex);
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// CHECK: %[[AP_CUR2:.*]] = load ptr, ptr %[[AP]]
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// CHECK-NEXT: %[[AP_NEXT2:.*]] = getelementptr inbounds i8, ptr %[[AP_CUR2]], i64 8
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// CHECK-NEXT: store ptr %[[AP_NEXT2]], ptr %[[AP]]
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// CHECK-NEXT: load ptr, ptr %[[AP_CUR2]]
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struct foo d = __builtin_va_arg(ap, struct foo);
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// CHECK: %[[AP_CUR3:.*]] = load ptr, ptr %[[AP]]
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// CHECK-NEXT: %[[AP_NEXT3:.*]] = getelementptr inbounds i8, ptr %[[AP_CUR3]], i64 8
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// CHECK-NEXT: store ptr %[[AP_NEXT3]], ptr %[[AP]]
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__builtin_va_list ap2;
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__builtin_va_copy(ap2, ap);
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// CHECK: call void @llvm.va_copy
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__builtin_va_end(ap);
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// CHECK: call void @llvm.va_end
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}
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