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26 lines
970 B
Rust
26 lines
970 B
Rust
//@ unit-test: GVN
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// FIXME(wesleywiser): Ideally, we could const-prop away all of this and just be left with
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// `let x = 42` but that doesn't work because const-prop doesn't support `Operand::Indirect`
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// and `InterpCx::eval_place()` always forces an allocation which creates the `Indirect`.
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// Fixing either of those will allow us to const-prop this away.
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// EMIT_MIR_FOR_EACH_BIT_WIDTH
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// EMIT_MIR discriminant.main.GVN.diff
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fn main() {
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// CHECK-LABEL: fn main(
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// CHECK: bb0: {
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// CHECK: switchInt(const 1_isize) -> [1: bb1, otherwise: bb3];
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// CHECK: bb1: {
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// CHECK: switchInt(const true) -> [0: bb3, otherwise: bb2];
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// CHECK: bb2: {
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// CHECK: [[tmp:_.*]] = const 42_i32;
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// CHECK: goto -> bb4;
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// CHECK: bb3: {
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// CHECK: [[tmp]] = const 10_i32;
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// CHECK: goto -> bb4;
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// CHECK: bb4: {
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// CHECK: {{_.*}} = Add(move [[tmp]], const 0_i32);
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let x = (if let Some(true) = Some(true) { 42 } else { 10 }) + 0;
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}
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