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Revert "cmd/compile: use generated loops instead of DUFFCOPY on amd64"

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This reverts commit ec9e1176c3 (CL 678620).

Reason for revert: causing regalloc to get into an infinite loop

Change-Id: Ie53c58c6126804af6d6883ea4acdcfb632a172bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/695196
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
This commit is contained in:
Keith Randall 2025-08-12 15:14:13 -07:00 • committed by Gopher Robot
parent d2b3c1a504
commit 4e182db5fc
8 changed files with 226 additions and 258 deletions
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1
src/cmd/compile/internal/ssa/rewrite.go
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@ -31,7 +31,6 @@ const (
removeDeadValues = true
repZeroThreshold = 1408 // size beyond which we use REP STOS for zeroing
repMoveThreshold = 1408 // size beyond which we use REP MOVS for copying
)
// deadcode indicates whether rewrite should try to remove any values that become dead.