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TheRock/compiler/amd-llvm/clang/test/CIR/Transforms/bit.cir
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

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// RUN: cir-opt -cir-canonicalize -cir-simplify -o %t.cir %s
// RUN: FileCheck --input-file=%t.cir %s
!s32i = !cir.int<s, 32>
!u32i = !cir.int<u, 32>
module {
cir.func @fold_clrsb() -> !s32i {
%0 = cir.const #cir.int<1> : !s32i
%1 = cir.clrsb %0 : !s32i
cir.return %1 : !s32i
}
// CHECK-LABEL: @fold_clrsb
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<30> : !s32i
// CHECK-NEXT: cir.return %[[R]] : !s32i
// CHECK-NEXT: }
cir.func @fold_clz() -> !u32i {
%0 = cir.const #cir.int<1> : !u32i
%1 = cir.clz %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_clz
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<31> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_clz_zero_poison() -> !u32i {
%0 = cir.const #cir.int<0> : !u32i
%1 = cir.clz %0 poison_zero : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_clz_zero_poison
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.poison : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_clz_zero_no_poison() -> !u32i {
%0 = cir.const #cir.int<0> : !u32i
%1 = cir.clz %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_clz_zero_no_poison
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<32> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_ctz() -> !u32i {
%0 = cir.const #cir.int<2> : !u32i
%1 = cir.ctz %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_ctz
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<1> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_ctz_zero_poison() -> !u32i {
%0 = cir.const #cir.int<0> : !u32i
%1 = cir.ctz %0 poison_zero : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_ctz_zero_poison
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.poison : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_ctz_zero_no_poison() -> !u32i {
%0 = cir.const #cir.int<0> : !u32i
%1 = cir.ctz %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_ctz_zero_no_poison
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<32> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_ffs() -> !s32i {
// 40 is 0b0010_1000
%0 = cir.const #cir.int<40> : !s32i
%1 = cir.ffs %0 : !s32i
cir.return %1 : !s32i
}
// CHECK-LABEL: @fold_ffs
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<4> : !s32i
// CHECK-NEXT: cir.return %[[R]] : !s32i
// CHECK-NEXT: }
cir.func @fold_ffs_zero() -> !s32i {
%0 = cir.const #cir.int<0> : !s32i
%1 = cir.ffs %0 : !s32i
cir.return %1 : !s32i
}
// CHECK-LABEL: @fold_ffs_zero
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<0> : !s32i
// CHECK-NEXT: cir.return %[[R]] : !s32i
// CHECK-NEXT: }
cir.func @fold_parity() -> !u32i {
// 0xdeadbeef is 0b1101_1110_1010_1101_1011_1110_1110_1111
// 0xdeadbeef contains 24 ones
%0 = cir.const #cir.int<0xdeadbeef> : !u32i
%1 = cir.parity %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_parity
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<0> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_popcount() -> !u32i {
// 0xdeadbeef is 0b1101_1110_1010_1101_1011_1110_1110_1111
// 0xdeadbeef contains 24 ones
%0 = cir.const #cir.int<0xdeadbeef> : !u32i
%1 = cir.popcount %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_popcount
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<24> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_bitreverse() -> !u32i {
// 0xdeadbeef is 0b1101_1110_1010_1101_1011_1110_1110_1111
%0 = cir.const #cir.int<0xdeadbeef> : !u32i
%1 = cir.bitreverse %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_bitreverse
// 4152210811 is 0b1111_0111_0111_1101_1011_0101_0111_1011
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<4152210811> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_byte_swap() -> !u32i {
%0 = cir.const #cir.int<0xdeadbeef> : !u32i
%1 = cir.byte_swap %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_byte_swap
// 4022250974 is 0xefbeadde
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<4022250974> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_input_poison() -> !s32i {
%0 = cir.const #cir.poison : !s32i
%1 = cir.clrsb %0 : !s32i
cir.return %1 : !s32i
}
// CHECK-LABEL: @fold_input_poison
// CHECK-NEXT: %[[P:.+]] = cir.const #cir.poison : !s32i
// CHECK-NEXT: cir.return %[[P]] : !s32i
// CHECK-NEXT: }
cir.func @fold_rotate_input_all_zeros(%arg0 : !u32i) -> !u32i {
%0 = cir.const #cir.int<0> : !u32i
%1 = cir.rotate left %0, %arg0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_rotate_input_all_zeros
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<0> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_rotate_input_all_ones(%arg0 : !u32i) -> !u32i {
// 4294967295 is 0b1111_1111_1111_1111_1111_1111_1111_1111
%0 = cir.const #cir.int<4294967295> : !u32i
%1 = cir.rotate left %0, %arg0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_rotate_input_all_ones
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<4294967295> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_rotate_zero_amount(%arg0 : !u32i) -> !u32i {
%0 = cir.const #cir.int<32> : !u32i
%1 = cir.rotate left %arg0, %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_rotate_zero_amount
// CHECK-SAME: (%[[R:.+]]: !u32i)
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_rotate_left() -> !u32i {
// 0xdeadbeef is 0b1101_1110_1010_1101_1011_1110_1110_1111
%0 = cir.const #cir.int<0xdeadbeef> : !u32i
%1 = cir.const #cir.int<8> : !u32i
%2 = cir.rotate left %0, %1 : !u32i
cir.return %2 : !u32i
}
// CHECK-LABEL: @fold_rotate_left
// 2914971614 is 0b1010_1101_1011_1110_1110_1111_1101_1110
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<2914971614> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_rotate_right() -> !u32i {
// 0xdeadbeef is 0b1101_1110_1010_1101_1011_1110_1110_1111
%0 = cir.const #cir.int<0xdeadbeef> : !u32i
%1 = cir.const #cir.int<8> : !u32i
%2 = cir.rotate right %0, %1 : !u32i
cir.return %2 : !u32i
}
// CHECK-LABEL: @fold_rotate_right
// 4260027374 is 0b1110_1111_1101_1110_1010_1101_1011_1110
// CHECK-NEXT: %[[R:.+]] = cir.const #cir.int<4024348094> : !u32i
// CHECK-NEXT: cir.return %[[R]] : !u32i
// CHECK-NEXT: }
cir.func @fold_rotate_input_poison(%arg0 : !u32i) -> !u32i {
%0 = cir.const #cir.poison : !u32i
%1 = cir.rotate left %0, %arg0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_rotate_input_poison
// CHECK-NEXT: %[[P:.+]] = cir.const #cir.poison : !u32i
// CHECK-NEXT: cir.return %[[P]] : !u32i
// CHECK-NEXT: }
cir.func @fold_rotate_amount_poison(%arg0 : !u32i) -> !u32i {
%0 = cir.const #cir.poison : !u32i
%1 = cir.rotate left %arg0, %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @fold_rotate_amount_poison
// CHECK-NEXT: %[[P:.+]] = cir.const #cir.poison : !u32i
// CHECK-NEXT: cir.return %[[P]] : !u32i
// CHECK-NEXT: }
cir.func @involution_bitreverse(%arg0 : !u32i) -> !u32i {
%0 = cir.bitreverse %arg0 : !u32i
%1 = cir.bitreverse %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @involution_bitreverse
// CHECK-SAME: (%[[X:.+]]: !u32i)
// CHECK-NEXT: cir.return %[[X]] : !u32i
// CHECK-NEXT: }
cir.func @involution_byte_swap(%arg0 : !u32i) -> !u32i {
%0 = cir.byte_swap %arg0 : !u32i
%1 = cir.byte_swap %0 : !u32i
cir.return %1 : !u32i
}
// CHECK-LABEL: @involution_byte_swap
// CHECK-SAME: (%[[X:.+]]: !u32i)
// CHECK-NEXT: cir.return %[[X]] : !u32i
// CHECK-NEXT: }
}
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