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cmd/compile: always mark atColumn1 results as statements
In 31618, we end up comparing the is-stmt-ness of positions to repurpose real instructions as inline marks. If the is-stmt-ness doesn't match, we end up not being able to remove the inline mark. Always use statement-full positions to do the matching, so we always find a match if there is one. Also always use positions that are statements for inline marks. Fixes #31618 Change-Id: Idaf39bdb32fa45238d5cd52973cadf4504f947d5 Reviewed-on: https://go-review.googlesource.com/c/go/+/173324 Run-TryBot: Keith Randall <[email protected]> Reviewed-by: David Chase <[email protected]>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,22 @@ | ||
// asmcheck | ||
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// Copyright 2019 The Go Authors. All rights reserved. | ||
// Use of this source code is governed by a BSD-style | ||
// license that can be found in the LICENSE file. | ||
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package codegen | ||
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// Make sure we remove both inline marks in the following code. | ||
// Both +5 and +6 should map to real instructions, which can | ||
// be used as inline marks instead of explicit nops. | ||
func f(x int) int { | ||
// amd64:-"XCHGL" | ||
x = g(x) + 5 | ||
// amd64:-"XCHGL" | ||
x = g(x) + 6 | ||
return x | ||
} | ||
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func g(x int) int { | ||
return x >> 3 | ||
} |