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annotate clang/test/CodeGenCXX/varargs.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 2e18cbf3894f
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150
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1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm %s -o - | FileCheck %s
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2
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3 // rdar://7309675
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4 // PR4678
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5 namespace test0 {
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6 // test1 should be compmiled to be a varargs function in the IR even
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7 // though there is no way to do a va_begin. Otherwise, the optimizer
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8 // will warn about 'dropped arguments' at the call site.
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9
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10 // CHECK-LABEL: define i32 @_ZN5test05test1Ez(...)
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11 int test1(...) {
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12 return -1;
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13 }
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14
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15 // CHECK: call i32 (...) @_ZN5test05test1Ez(i32 0)
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16 void test() {
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17 test1(0);
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18 }
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19 }
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20
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21 namespace test1 {
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22 struct A {
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23 int x;
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24 int y;
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25 };
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26
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27 void foo(...);
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28
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29 void test() {
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30 A x;
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31 foo(x);
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32 }
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33 // CHECK-LABEL: define void @_ZN5test14testEv()
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34 // CHECK: [[X:%.*]] = alloca [[A:%.*]], align 4
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35 // CHECK-NEXT: [[TMP:%.*]] = alloca [[A]], align 4
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36 // CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[TMP]] to i8*
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37 // CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[X]] to i8*
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38 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[T0]], i8* align 4 [[T1]], i64 8, i1 false)
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39 // CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[TMP]] to i64*
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40 // CHECK-NEXT: [[T1:%.*]] = load i64, i64* [[T0]], align 4
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41 // CHECK-NEXT: call void (...) @_ZN5test13fooEz(i64 [[T1]])
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42 // CHECK-NEXT: ret void
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43 }