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test/codegen: add bitwise operation combination tests

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This commit adds two test functions, bitsOptXor1 and bitsOptXor2,
to verify that the compiler correctly optimizes certain bitwise
expression patterns in future CLs.

Change-Id: Idf5bd1ff8653f8fa218604d857639e063546d8e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/736540
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Xiaolin Zhao 2026-01-15 16:30:30 +08:00 • committed by abner chenc
parent bae9486d07
commit 5aa006dee0
1 changed files with 12 additions and 0 deletions
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12
test/codegen/bits.go
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@ -563,3 +563,15 @@ func bitsRotateAndMask(io64 [8]uint64, io32 [4]uint32, io16 [4]uint16, io8 [4]ui
// ppc64x: "ANDCC [$]120"
io8[0] = io8[0] & uint8(bigc)
}
func bitsOpXor1(x, y uint32) uint32 {
// arm64: "ORR" "AND" "BIC"
// loong64: "OR " "AND " "ANDN"
return (x | y) &^ (x & y)
}
func bitsOpXor2(x, y uint32) uint32 {
// arm64: "BIC" "ORR"
// loong64: "ANDN" "OR "
return (x &^ y) | (^x & y)
}