mir-opt: Use one MirPatch in MatchBranchSimplification

[dianqk]

No description provided.

[rustbot]

r? @jieyouxu

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[rustbot]

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

[jieyouxu]

r? mir-opt

[cjgillot]

Is there a test where the opt fires at least twice?

[dianqk]

Is there a test where the opt fires at least twice?

Perhaps match_nested_if is one:

rust/tests/mir-opt/matches_reduce_branches.rs

Lines 67 to 83 in b8005bf

	fn match_nested_if() -> bool {
	// CHECK-LABEL: fn match_nested_if(
	// CHECK-NOT: switchInt
	// CHECK: return
	let val = match () {
	() if if if if true { true } else { false } { true } else { false } {
	true
	} else {
	false
	} =>
	{
	true
	}
	_ => false,
	};
	val
	}

[dianqk]

r? mir-opt

[oli-obk]

@bors r+ rollup

[bors]

📌 Commit 11cfc16 has been approved by oli-obk

It is now in the queue for this repository.