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104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
// #target: macos-x64
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module foo;
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extern fn void printf(char*, ...);
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bitstruct Foo : uint
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{
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int x : 1..3;
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uint y : 11..13;
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int z : 15..15;
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}
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bitstruct Foo2 : char[4]
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{
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int x : 1..3;
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uint y : 11..13;
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int z : 15..15;
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}
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fn void test()
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{
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Foo b = {};
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int x = (int)b;
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char[4] y = (char[4])b;
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Foo *c = &b;
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c.x;
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int* x2 = (int*)c;
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char[4]* y2 = (char[4]*)c;
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}
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fn void test2()
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{
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Foo2 b = { 3, 2, -1 };
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int x = (int)b;
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char[4] y = (char[4])b;
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Foo2 *c = &b;
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printf("%d\n", c.x);
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int* x2 = (int*)c;
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char[4]* y2 = (char[4]*)c;
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}
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fn void main()
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{
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test();
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test2();
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}
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/* #expect: foo.ll
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define void @foo_test() #0 {
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entry:
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%b = alloca i32, align 4
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%x = alloca i32, align 4
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%y = alloca [4 x i8], align 1
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%c = alloca ptr, align 8
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%x2 = alloca ptr, align 8
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%y2 = alloca ptr, align 8
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store i32 0, ptr %b, align 4
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%0 = load i32, ptr %b, align 4
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store i32 %0, ptr %x, align 4
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%1 = load [4 x i8], ptr %b, align 4
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store [4 x i8] %1, ptr %y, align 1
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store ptr %b, ptr %c, align 8
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%2 = load ptr, ptr %c, align 8
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%3 = load i32, ptr %2, align 8
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%shl = shl i32 %3, 28
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%ashr = ashr i32 %shl, 29
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%4 = load ptr, ptr %c, align 8
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store ptr %4, ptr %x2, align 8
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%5 = load ptr, ptr %c, align 8
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store ptr %5, ptr %y2, align 8
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ret void
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}
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; Function Attrs: nounwind
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define void @foo_test2() #0 {
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entry:
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%b = alloca [4 x i8], align 1
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%x = alloca i32, align 4
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%y = alloca [4 x i8], align 1
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%c = alloca ptr, align 8
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%x2 = alloca ptr, align 8
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%y2 = alloca ptr, align 8
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store [4 x i8] c"\06\90\00\00", ptr %b, align 1
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%0 = load i32, ptr %b, align 1
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store i32 %0, ptr %x, align 4
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 %y, ptr align 1 %b, i32 4, i1 false)
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store ptr %b, ptr %c, align 8
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%1 = load ptr, ptr %c, align 8
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%2 = getelementptr inbounds [4 x i8], ptr %1, i64 0, i64 0
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%3 = load i8, ptr %2, align 1
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%zext = zext i8 %3 to i32
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%lshrl = lshr i32 %zext, 1
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%shl = shl i32 %lshrl, 29
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%ashr = ashr i32 %shl, 29
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call void (ptr, ...) @printf(ptr @.str, i32 %ashr)
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%4 = load ptr, ptr %c, align 8
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store ptr %4, ptr %x2, align 8
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%5 = load ptr, ptr %c, align 8
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store ptr %5, ptr %y2, align 8
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ret void
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}
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