a5b5208ba6
When #embed appears in an initializer list, we may choose a "fast path" if the target declaration is a char array. We simply initialize it with string literal that contains embedded data. However we need to be careful when checking that we actually can use this "fast path" since char array may be nested in a struct.
94 lines
3.5 KiB
C++
94 lines
3.5 KiB
C++
// RUN: %clang_cc1 %s -triple x86_64 --embed-dir=%S/Inputs -emit-llvm -o - | FileCheck %s
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// CHECK: @__const._Z3fooi.ca = private unnamed_addr constant [3 x i32] [i32 0, i32 106, i32 107], align 4
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// CHECK: @__const._Z3fooi.sc = private unnamed_addr constant %struct.S1 { i32 106, i32 107, i32 0 }, align 4
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// CHECK: @__const._Z3fooi.t = private unnamed_addr constant [3 x %struct.T] [%struct.T { [2 x i32] [i32 48, i32 49], %struct.S1 { i32 50, i32 51, i32 52 } }, %struct.T { [2 x i32] [i32 53, i32 54], %struct.S1 { i32 55, i32 56, i32 57 } }, %struct.T { [2 x i32] [i32 10, i32 0], %struct.S1 zeroinitializer }], align 16
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// CHECK: @__const._Z3fooi.W = private unnamed_addr constant %struct.Wrapper { i32 48, %struct.HasCharArray { [10 x i8] c"123456789\0A" } }, align 4
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void foo(int a) {
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// CHECK: %a.addr = alloca i32, align 4
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// CHECK: store i32 %a, ptr %a.addr, align 4
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %ca, ptr align 4 @__const._Z3fooi.ca, i64 12, i1 false)
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int ca[] = {
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0
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#embed <jk.txt> prefix(,)
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};
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// CHECK: %arrayinit.element = getelementptr inbounds i32, ptr %notca, i64 1
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// CHECK: store i8 106, ptr %arrayinit.element, align 4
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// CHECK: %arrayinit.element1 = getelementptr inbounds i32, ptr %notca, i64 2
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// CHECK: store i8 107, ptr %arrayinit.element1, align 4
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int notca[] = {
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a
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#embed <jk.txt> prefix(,)
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};
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struct S1 {
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int x, y, z;
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};
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %sc, ptr align 4 @__const._Z3fooi.sc, i64 12, i1 false)
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S1 sc = {
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#embed <jk.txt> suffix(,)
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0
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};
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// CHECK: %x = getelementptr inbounds %struct.S1, ptr %s, i32 0, i32 0
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// CHECK: store i32 106, ptr %x, align 4
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// CHECK: %y = getelementptr inbounds %struct.S1, ptr %s, i32 0, i32 1
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// CHECK: store i32 107, ptr %y, align 4
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// CHECK: %z = getelementptr inbounds %struct.S1, ptr %s, i32 0, i32 2
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// CHECK: %1 = load i32, ptr %a.addr, align 4
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S1 s = {
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#embed <jk.txt> suffix(,)
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a
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};
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// CHECK: store i32 107, ptr %b, align 4
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int b = (
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#embed<jk.txt>
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)
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;
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struct T {
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int arr[2];
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struct S1 s;
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};
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 16 %t, ptr align 16 @__const._Z3fooi.t, i64 60, i1 false)
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constexpr struct T t[] = {
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#embed <numbers.txt>
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};
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// CHECK: %arr = getelementptr inbounds %struct.T, ptr %tnonc, i32 0, i32 0
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// CHECK: %2 = load i32, ptr %a.addr, align 4
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// CHECK: store i32 %2, ptr %arr, align 4
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// CHECK: %arrayinit.element2 = getelementptr inbounds i32, ptr %arr, i64 1
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// CHECK: store i32 300, ptr %arrayinit.element2, align 4
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// CHECK: %s3 = getelementptr inbounds %struct.T, ptr %tnonc, i32 0, i32 1
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// CHECK: %x4 = getelementptr inbounds %struct.S1, ptr %s3, i32 0, i32 0
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// CHECK: store i32 1, ptr %x4, align 4
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// CHECK: %y5 = getelementptr inbounds %struct.S1, ptr %s3, i32 0, i32 1
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// CHECK: store i32 2, ptr %y5, align 4
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// CHECK: %z6 = getelementptr inbounds %struct.S1, ptr %s3, i32 0, i32 2
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// CHECK: store i32 3, ptr %z6, align 4
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// CHECK: %arrayinit.element7 = getelementptr inbounds %struct.T, ptr %tnonc, i64 1
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// CHECK: call void @llvm.memset.p0.i64(ptr align 4 %arrayinit.element7, i8 0, i64 20, i1 false)
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// CHECK: %arr8 = getelementptr inbounds %struct.T, ptr %arrayinit.element7, i32 0, i32 0
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// CHECK: store i8 106, ptr %arr8, align 4
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// CHECK: %arrayinit.element9 = getelementptr inbounds i32, ptr %arr8, i64 1
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// CHECK: store i8 107, ptr %arrayinit.element9, align 4
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struct T tnonc[] = {
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a, 300, 1, 2, 3
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#embed <jk.txt> prefix(,)
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};
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struct HasCharArray { unsigned char h[10]; };
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struct Wrapper { int a; struct HasCharArray d; };
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constexpr struct Wrapper W = {
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#embed "numbers.txt"
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};
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}
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