64 lines
2 KiB
C
64 lines
2 KiB
C
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// RUN: %clang_cc1 -S %s -std=c2x -emit-llvm -o - | FileCheck %s
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// Test that null <-> nullptr_t conversions work as expected.
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typedef typeof(nullptr) nullptr_t;
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nullptr_t nullptr_t_val;
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void bool_func(bool);
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void nullptr_func(nullptr_t);
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void test() {
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// Test initialization
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bool bool_from_nullptr_t = nullptr_t_val;
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nullptr_t nullptr_t_from_nullptr = nullptr;
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void *vp_from_nullptr_t = nullptr_t_val;
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nullptr_t nullptr_t_from_vp = (void *)0;
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nullptr_t nullptr_t_from_int = 0;
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// Test assignment
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bool_from_nullptr_t = nullptr_t_val;
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nullptr_t_from_nullptr = nullptr;
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vp_from_nullptr_t = nullptr_t_val;
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nullptr_t_from_vp = (void *)0;
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nullptr_t_from_int = 0;
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// Test calls
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bool_func(nullptr_t_from_nullptr);
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nullptr_func(nullptr_t_from_nullptr);
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nullptr_func(0);
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nullptr_func((void *)0);
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nullptr_func(nullptr);
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nullptr_func(false);
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// Allocation of locals
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// CHECK: %[[bool_from_nullptr_t:.*]] = alloca i8
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// CHECK: %[[nullptr_t_from_nullptr:.*]] = alloca ptr
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// CHECK: %[[vp_from_nullptr_t:.*]] = alloca ptr
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// CHECK: %[[nullptr_t_from_vp:.*]] = alloca ptr
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// CHECK: %[[nullptr_t_from_int:.*]] = alloca ptr
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// Initialization of locals
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// CHECK: store i8 0, ptr %[[bool_from_nullptr_t]]
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// CHECK: store ptr null, ptr %[[nullptr_t_from_nullptr]]
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// CHECK: store ptr null, ptr %[[vp_from_nullptr_t]]
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// CHECK: store ptr null, ptr %[[nullptr_t_from_vp]]
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// CHECK: store ptr null, ptr %[[nullptr_t_from_int]]
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// Assignment expressions
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// CHECK: store i8 0, ptr %[[bool_from_nullptr_t]]
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// CHECK: store ptr null, ptr %[[nullptr_t_from_nullptr]]
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// CHECK: store ptr null, ptr %[[vp_from_nullptr_t]]
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// CHECK: store ptr null, ptr %[[nullptr_t_from_vp]]
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// CHECK: store ptr null, ptr %[[nullptr_t_from_int]]
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// Calls
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// CHECK: call void @bool_func(i1 noundef {{(zeroext )?}}false)
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// CHECK: call void @nullptr_func(ptr null)
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// CHECK: call void @nullptr_func(ptr null)
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// CHECK: call void @nullptr_func(ptr null)
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// CHECK: call void @nullptr_func(ptr null)
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// CHECK: call void @nullptr_func(ptr null)
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}
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