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cmd/compile/internal/base: keep Ctxt.Flag_optimize in sync with Flag.N

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This patch fixes an inconsistency in compiler flag handling introduced
accidentally in CL 521699. In the compiler we have both base.Flag.N
(which records whether the user has supplied the "-N" flag to disable
optimization) and base.Ctxt.Flag_optimize (which tracks whether
optimization is turned on). In this case Flag.N was updated without a
corresponding change to Ctxt.Flag_optimize, which led to problems with
DWARF generation for the runtime.

This CL doesn't include a regression test; a test will be added later
in the x/debug repo in a subsequent CL.

Updates #62523.

Change-Id: I0c383bb43ec0a0e7c12e7e2852c0590731416d6f
Reviewed-on: https://go-review.googlesource.com/c/go/+/527319
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Alessandro Arzilli <alessandro.arzilli@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Than McIntosh 2023-09-11 12:15:48 -04:00
parent 94200bf85c
commit 2399302a25
1 changed files with 1 additions and 0 deletions
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src/cmd/compile/internal/base/flag.go
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@ -334,6 +334,7 @@ func ParseFlags() {
// It is not possible to build the runtime with no optimizations,
// because the compiler cannot eliminate enough write barriers.
Flag.N = 0
Ctxt.Flag_optimize = true
// Runtime can't use -d=checkptr, at least not yet.
Debug.Checkptr = 0