Auto merge of #46093 - scottmcm:lower-128-mir, r=nagisa
Add a MIR pass to lower 128-bit operators to lang item calls Runs only with `-Z lower_128bit_ops` since it's not hooked into targets yet. This isn't really useful on its own, but the declarations for the lang items need to be in the compiler before compiler-builtins can be updated to define them, so this is part 1 of at least 3. cc https://github.com/rust-lang/rust/issues/45676 @est31 @nagisa
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145
src/test/mir-opt/lower_128bit_debug_test.rs
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145
src/test/mir-opt/lower_128bit_debug_test.rs
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags: -Z lower_128bit_ops -C debug_assertions=yes
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#![feature(i128_type)]
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#![feature(lang_items)]
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#[lang="i128_div"]
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fn i128_div(_x: i128, _y: i128) -> i128 { 3 }
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#[lang="u128_div"]
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fn u128_div(_x: u128, _y: u128) -> u128 { 4 }
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#[lang="i128_rem"]
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fn i128_rem(_x: i128, _y: i128) -> i128 { 5 }
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#[lang="u128_rem"]
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fn u128_rem(_x: u128, _y: u128) -> u128 { 6 }
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#[lang="i128_addo"]
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fn i128_addo(_x: i128, _y: i128) -> (i128, bool) { (0, false) }
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#[lang="u128_addo"]
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fn u128_addo(_x: u128, _y: u128) -> (u128, bool) { (1, false) }
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#[lang="i128_subo"]
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fn i128_subo(_x: i128, _y: i128) -> (i128, bool) { (2, false) }
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#[lang="u128_subo"]
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fn u128_subo(_x: u128, _y: u128) -> (u128, bool) { (3, false) }
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#[lang="i128_mulo"]
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fn i128_mulo(_x: i128, _y: i128) -> (i128, bool) { (4, false) }
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#[lang="u128_mulo"]
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fn u128_mulo(_x: u128, _y: u128) -> (u128, bool) { (5, false) }
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#[lang="i128_shlo"]
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fn i128_shlo(_x: i128, _y: u128) -> (i128, bool) { (6, false) }
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#[lang="u128_shlo"]
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fn u128_shlo(_x: u128, _y: u128) -> (u128, bool) { (6, false) }
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#[lang="i128_shro"]
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fn i128_shro(_x: i128, _y: u128) -> (i128, bool) { (7, false) }
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#[lang="u128_shro"]
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fn u128_shro(_x: u128, _y: u128) -> (u128, bool) { (8, false) }
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fn test_signed(mut x: i128) -> i128 {
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x += 1;
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x -= 2;
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x *= 3;
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x /= 4;
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x %= 5;
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x <<= 6;
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x >>= 7;
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x
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}
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fn test_unsigned(mut x: u128) -> u128 {
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x += 1;
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x -= 2;
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x *= 3;
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x /= 4;
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x %= 5;
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x <<= 6;
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x >>= 7;
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x
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}
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fn main() {
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test_signed(-200);
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test_unsigned(200);
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}
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// END RUST SOURCE
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// START rustc.test_signed.Lower128Bit.after.mir
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// _2 = const i128_addo(_1, const 1i128) -> bb10;
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// ...
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// _1 = (_2.0: i128);
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// _3 = const i128_subo(_1, const 2i128) -> bb11;
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// ...
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// _1 = (_3.0: i128);
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// _4 = const i128_mulo(_1, const 3i128) -> bb12;
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// ...
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// _1 = (_4.0: i128);
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// ...
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// _1 = const i128_div(_1, const 4i128) -> bb13;
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// ...
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// _1 = const i128_rem(_1, const 5i128) -> bb15;
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// ...
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// _1 = (_13.0: i128);
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// ...
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// _17 = const 7i32 as u128 (Misc);
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// _14 = const i128_shro(_1, _17) -> bb16;
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// ...
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// _1 = (_14.0: i128);
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// ...
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// assert(!(_2.1: bool), "attempt to add with overflow") -> bb1;
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// ...
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// assert(!(_3.1: bool), "attempt to subtract with overflow") -> bb2;
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// ...
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// assert(!(_4.1: bool), "attempt to multiply with overflow") -> bb3;
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// ...
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// assert(!(_13.1: bool), "attempt to shift left with overflow") -> bb8;
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// ...
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// _16 = const 6i32 as u128 (Misc);
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// _13 = const i128_shlo(_1, _16) -> bb14;
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// ...
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// assert(!(_14.1: bool), "attempt to shift right with overflow") -> bb9;
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// END rustc.test_signed.Lower128Bit.after.mir
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// START rustc.test_unsigned.Lower128Bit.after.mir
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// _2 = const u128_addo(_1, const 1u128) -> bb8;
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// ...
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// _1 = (_2.0: u128);
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// _3 = const u128_subo(_1, const 2u128) -> bb9;
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// ...
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// _1 = (_3.0: u128);
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// _4 = const u128_mulo(_1, const 3u128) -> bb10;
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// ...
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// _1 = (_4.0: u128);
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// ...
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// _1 = const u128_div(_1, const 4u128) -> bb11;
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// ...
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// _1 = const u128_rem(_1, const 5u128) -> bb13;
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// ...
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// _1 = (_7.0: u128);
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// ...
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// _11 = const 7i32 as u128 (Misc);
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// _8 = const u128_shro(_1, _11) -> bb14;
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// ...
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// _1 = (_8.0: u128);
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// ...
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// assert(!(_2.1: bool), "attempt to add with overflow") -> bb1;
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// ...
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// assert(!(_3.1: bool), "attempt to subtract with overflow") -> bb2;
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// ...
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// assert(!(_4.1: bool), "attempt to multiply with overflow") -> bb3;
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// ...
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// assert(!(_7.1: bool), "attempt to shift left with overflow") -> bb6;
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// ...
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// _10 = const 6i32 as u128 (Misc);
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// _7 = const u128_shlo(_1, _10) -> bb12;
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// ...
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// assert(!(_8.1: bool), "attempt to shift right with overflow") -> bb7;
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// END rustc.test_unsigned.Lower128Bit.after.mir
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108
src/test/mir-opt/lower_128bit_test.rs
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108
src/test/mir-opt/lower_128bit_test.rs
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags: -Z lower_128bit_ops -C debug_assertions=no
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#![feature(i128_type)]
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#![feature(lang_items)]
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#[lang="i128_add"]
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fn i128_add(_x: i128, _y: i128) -> i128 { 0 }
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#[lang="u128_add"]
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fn u128_add(_x: u128, _y: u128) -> u128 { 0 }
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#[lang="i128_sub"]
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fn i128_sub(_x: i128, _y: i128) -> i128 { 1 }
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#[lang="u128_sub"]
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fn u128_sub(_x: u128, _y: u128) -> u128 { 1 }
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#[lang="i128_mul"]
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fn i128_mul(_x: i128, _y: i128) -> i128 { 2 }
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#[lang="u128_mul"]
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fn u128_mul(_x: u128, _y: u128) -> u128 { 2 }
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#[lang="i128_div"]
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fn i128_div(_x: i128, _y: i128) -> i128 { 3 }
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#[lang="u128_div"]
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fn u128_div(_x: u128, _y: u128) -> u128 { 4 }
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#[lang="i128_rem"]
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fn i128_rem(_x: i128, _y: i128) -> i128 { 5 }
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#[lang="u128_rem"]
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fn u128_rem(_x: u128, _y: u128) -> u128 { 6 }
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#[lang="i128_shl"]
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fn i128_shl(_x: i128, _y: u32) -> i128 { 7 }
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#[lang="u128_shl"]
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fn u128_shl(_x: u128, _y: u32) -> u128 { 7 }
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#[lang="i128_shr"]
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fn i128_shr(_x: i128, _y: u32) -> i128 { 8 }
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#[lang="u128_shr"]
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fn u128_shr(_x: u128, _y: u32) -> u128 { 9 }
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fn test_signed(mut x: i128) -> i128 {
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x += 1;
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x -= 2;
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x *= 3;
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x /= 4;
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x %= 5;
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x <<= 6;
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x >>= 7;
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x
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}
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fn test_unsigned(mut x: u128) -> u128 {
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x += 1;
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x -= 2;
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x *= 3;
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x /= 4;
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x %= 5;
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x <<= 6;
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x >>= 7;
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x
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}
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fn main() {
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test_signed(-200);
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test_unsigned(200);
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}
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// END RUST SOURCE
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// START rustc.test_signed.Lower128Bit.after.mir
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// _1 = const i128_add(_1, const 1i128) -> bb7;
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// ...
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// _1 = const i128_div(_1, const 4i128) -> bb8;
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// ...
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// _1 = const i128_rem(_1, const 5i128) -> bb11;
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// ...
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// _1 = const i128_mul(_1, const 3i128) -> bb5;
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// ...
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// _1 = const i128_sub(_1, const 2i128) -> bb6;
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// ...
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// _11 = const 7i32 as u32 (Misc);
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// _1 = const i128_shr(_1, _11) -> bb9;
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// ...
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// _12 = const 6i32 as u32 (Misc);
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// _1 = const i128_shl(_1, _12) -> bb10;
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// END rustc.test_signed.Lower128Bit.after.mir
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// START rustc.test_unsigned.Lower128Bit.after.mir
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// _1 = const u128_add(_1, const 1u128) -> bb5;
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// ...
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// _1 = const u128_div(_1, const 4u128) -> bb6;
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// ...
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// _1 = const u128_rem(_1, const 5u128) -> bb9;
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// ...
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// _1 = const u128_mul(_1, const 3u128) -> bb3;
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// ...
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// _1 = const u128_sub(_1, const 2u128) -> bb4;
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// ...
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// _5 = const 7i32 as u32 (Misc);
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// _1 = const u128_shr(_1, _5) -> bb7;
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// ...
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// _6 = const 6i32 as u32 (Misc);
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// _1 = const u128_shl(_1, _6) -> bb8;
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// END rustc.test_unsigned.Lower128Bit.after.mir
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