Skip to content

cmd/compile: miscompilation in star-tex.org/x/cmd/star-tex [1.20 backport] #59468

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom
Closed
gopherbot opened this issue Apr 6, 2023 · 3 comments
Closed

cmd/compile: miscompilation in star-tex.org/x/cmd/star-tex [1.20 backport] #59468

gopherbot opened this issue Apr 6, 2023 · 3 comments
Labels
CherryPickApproved Used during the release process for point releases compiler/runtime Issues related to the Go compiler and/or runtime. FrozenDueToAge
Milestone
Go1.20.4

Comments

@gopherbot
Copy link
Contributor

@dr2chase requested issue #59432 to be considered for backport to the next 1.20 minor release.

@gopherbot please open the backport tracking issues. This is a severe compiler bug.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Apr 6, 2023
@gopherbot gopherbot mentioned this issue Apr 6, 2023
Closed
@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Apr 6, 2023
@gopherbot gopherbot added this to the Go1.20.4 milestone Apr 6, 2023
@gopherbot
Copy link
Contributor Author

Change https://go.dev/cl/482815 mentions this issue: [release-branch.go1.20] cmd/compile: use correct type in amd64 late-lower rules

@gopherbot
Copy link
Contributor Author

Change https://go.dev/cl/482164 mentions this issue: cmd/compile: remove broken LEA "optimization"

@dr2chase dr2chase added the CherryPickApproved Used during the release process for point releases label Apr 12, 2023
@gopherbot gopherbot removed the CherryPickCandidate Used during the release process for point releases label Apr 12, 2023
@gopherbot
Copy link
Contributor Author

Closed by merging 446493f to release-branch.go1.20.

gopherbot pushed a commit that referenced this issue Apr 24, 2023
@dr2chase @gopherbot
[release-branch.go1.20] cmd/compile: remove broken LEA "optimization"
446493f 
CL 440035 added rewrite rules to simplify "costly" LEA
instructions, but the types in the rewrites were wrong and
the code would go bad if the wrong-typed register was spilled.

CL 482536 attempted to fix this by correcting the type in the
rewrite, but that "fix" broke something on windows-amd64-race.

Instead / for-now, remove the offending rewrite rules.

Updates #21735.
Updates #59432.
Fixes #59468.

Change-Id: I0497c42db414f2055e1378e0a53e2bceee9cd5d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/482820
Run-TryBot: David Chase <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
(cherry picked from commit 6a97a60)
Reviewed-on: https://go-review.googlesource.com/c/go/+/482164
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
bradfitz pushed a commit to tailscale/go that referenced this issue May 25, 2023
@dr2chase @bradfitz
[release-branch.go1.20] cmd/compile: remove broken LEA "optimization"
3449b49 
CL 440035 added rewrite rules to simplify "costly" LEA
instructions, but the types in the rewrites were wrong and
the code would go bad if the wrong-typed register was spilled.

CL 482536 attempted to fix this by correcting the type in the
rewrite, but that "fix" broke something on windows-amd64-race.

Instead / for-now, remove the offending rewrite rules.

Updates golang#21735.
Updates golang#59432.
Fixes golang#59468.

Change-Id: I0497c42db414f2055e1378e0a53e2bceee9cd5d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/482820
Run-TryBot: David Chase <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
(cherry picked from commit 6a97a60)
Reviewed-on: https://go-review.googlesource.com/c/go/+/482164
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
bradfitz pushed a commit to tailscale/go that referenced this issue May 25, 2023
@dr2chase @bradfitz
[release-branch.go1.20] cmd/compile: remove broken LEA "optimization"
4ed3c81 
CL 440035 added rewrite rules to simplify "costly" LEA
instructions, but the types in the rewrites were wrong and
the code would go bad if the wrong-typed register was spilled.

CL 482536 attempted to fix this by correcting the type in the
rewrite, but that "fix" broke something on windows-amd64-race.

Instead / for-now, remove the offending rewrite rules.

Updates golang#21735.
Updates golang#59432.
Fixes golang#59468.

Change-Id: I0497c42db414f2055e1378e0a53e2bceee9cd5d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/482820
Run-TryBot: David Chase <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
(cherry picked from commit 6a97a60)
Reviewed-on: https://go-review.googlesource.com/c/go/+/482164
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
@golang golang locked and limited conversation to collaborators Apr 23, 2024
Sign up for free to subscribe to this conversation on GitHub. Already have an account? Sign in.
Assignees
No one assigned
Labels
CherryPickApproved Used during the release process for point releases compiler/runtime Issues related to the Go compiler and/or runtime. FrozenDueToAge
Projects
None yet
Milestone
Go1.20.4
Development

No branches or pull requests
3 participants
@dr2chase @gopherbot and others