mirror of https://github.com/rust-lang/rust
47 lines
1.0 KiB
Rust
47 lines
1.0 KiB
Rust
//@ test-mir-pass: GVN
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#![feature(custom_mir, core_intrinsics)]
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extern crate core;
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use core::intrinsics::mir::*;
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#[custom_mir(dialect = "runtime", phase = "initial")]
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fn fn0() {
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// CHECK-LABEL: fn fn0(
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mir! {
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let a: usize;
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let b: [u128; 6];
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let c: ([u128; 6],);
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let d: ([u128; 6],);
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let x: ();
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{
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// CHECK: bb0: {
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// CHECK-NEXT: _1 = const 1_usize;
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// CHECK-NEXT: _2 = [const 42_u128; 6];
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// CHECK-NEXT: _2[1 of 2] = const 1_u128;
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// CHECK-NEXT: _3 = (_2,);
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// CHECK-NEXT: _4 = _3;
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// CHECK-NEXT: _5 = fn1((_3.0: [u128; 6]), _3)
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a = 1_usize;
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b = [42; 6];
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b[a] = 1;
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c = (b,);
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d = c;
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Call(x = fn1(Move(c.0), d), ReturnTo(bb1), UnwindUnreachable())
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}
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bb1 = {
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Return()
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}
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}
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}
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#[inline(never)]
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fn fn1(a: [u128; 6], mut b: ([u128; 6],)) {
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b.0 = [0; 6];
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}
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fn main() {
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fn0();
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}
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// EMIT_MIR gvn_copy_moves.fn0.GVN.diff
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