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92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
// #target: macos-x64
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module foo;
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bitstruct BitFieldCross : char[3]
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{
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uint d : 0..4;
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int a : 5..22;
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uint c : 23..23;
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}
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bitstruct BitFieldCrossU : char[3]
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{
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uint d : 0..4;
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uint a : 5..22;
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uint c : 23..23;
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}
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extern fn void printf(char*, ...);
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fn void main()
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{
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BitFieldCross xx = { 0, -17, 0 };
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printf("%d\n", xx.a);
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xx = { 0x1f, -17, 1 };
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printf("%d\n", xx.a);
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BitFieldCrossU xxu = { 0x1f, 0x15678, 1 };
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printf("%x\n", xxu.a);
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}
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/* #expect: foo.ll
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define void @foo.main() #0 {
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entry:
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%xx = alloca [3 x i8], align 1
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%xxu = alloca [3 x i8], align 1
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store [3 x i8] c"\E0\FD\7F", ptr %xx, align 1
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%0 = getelementptr inbounds [3 x i8], ptr %xx, i64 0, i64 0
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%1 = load i8, ptr %0, align 1
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%zext = zext i8 %1 to i32
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%lshrl = lshr i32 %zext, 5
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%2 = getelementptr inbounds [3 x i8], ptr %xx, i64 0, i64 1
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%3 = load i8, ptr %2, align 1
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%zext1 = zext i8 %3 to i32
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%shl = shl i32 %zext1, 3
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%4 = or i32 %shl, %lshrl
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%5 = getelementptr inbounds [3 x i8], ptr %xx, i64 0, i64 2
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%6 = load i8, ptr %5, align 1
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%zext2 = zext i8 %6 to i32
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%shl3 = shl i32 %zext2, 11
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%7 = or i32 %shl3, %4
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%shl4 = shl i32 %7, 14
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%ashr = ashr i32 %shl4, 14
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call void (ptr, ...) @printf(ptr @.str, i32 %ashr)
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store [3 x i8] c"\FF\FD\FF", ptr %xx, align 1
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%8 = getelementptr inbounds [3 x i8], ptr %xx, i64 0, i64 0
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%9 = load i8, ptr %8, align 1
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%zext5 = zext i8 %9 to i32
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%lshrl6 = lshr i32 %zext5, 5
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%10 = getelementptr inbounds [3 x i8], ptr %xx, i64 0, i64 1
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%11 = load i8, ptr %10, align 1
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%zext7 = zext i8 %11 to i32
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%shl8 = shl i32 %zext7, 3
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%12 = or i32 %shl8, %lshrl6
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%13 = getelementptr inbounds [3 x i8], ptr %xx, i64 0, i64 2
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%14 = load i8, ptr %13, align 1
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%zext9 = zext i8 %14 to i32
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%shl10 = shl i32 %zext9, 11
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%15 = or i32 %shl10, %12
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%shl11 = shl i32 %15, 14
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%ashr12 = ashr i32 %shl11, 14
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call void (ptr, ...) @printf(ptr @.str.1, i32 %ashr12)
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store [3 x i8] c"\1F\CF\AA", ptr %xxu, align 1
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%16 = getelementptr inbounds [3 x i8], ptr %xxu, i64 0, i64 0
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%17 = load i8, ptr %16, align 1
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%zext13 = zext i8 %17 to i32
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%lshrl14 = lshr i32 %zext13, 5
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%18 = getelementptr inbounds [3 x i8], ptr %xxu, i64 0, i64 1
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%19 = load i8, ptr %18, align 1
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%zext15 = zext i8 %19 to i32
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%shl16 = shl i32 %zext15, 3
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%20 = or i32 %shl16, %lshrl14
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%21 = getelementptr inbounds [3 x i8], ptr %xxu, i64 0, i64 2
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%22 = load i8, ptr %21, align 1
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%zext17 = zext i8 %22 to i32
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%shl18 = shl i32 %zext17, 11
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%23 = or i32 %shl18, %20
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%24 = and i32 262143, %23
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call void (ptr, ...) @printf(ptr @.str.2, i32 %24)
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ret void
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}
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