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cmd/compile: bail PGO method lookup on interface types

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Interface types don't have concrete method implementations, so it does
not make sense to attempt a lookup.

An interface method would not normally appear in a PGO profile as it has
no symbol in the final binary. However it can appear if the method was
concrete when the profile was collected and it has since been refactored
to an interface method in the code being compiled.

The guards here (OTYPE, !Alias, !IsInterface) now match
noder.linker.relocObj, which does a similar iteration of all methods.

Fixes #67016.

Change-Id: I858c58929c890ac0b2019fbd7c99f683ab63f8bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/581436
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Michael Pratt 2024-04-24 11:19:17 -04:00
parent 3aad2d0765
commit 508e761978
1 changed files with 3 additions and 0 deletions
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3
src/cmd/compile/internal/noder/unified.go
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@ -120,6 +120,9 @@ func lookupMethod(pkg *types.Pkg, symName string) (*ir.Func, error) {
if name.Alias() {
return nil, fmt.Errorf("type sym %v refers to alias", typ)
}
if name.Type().IsInterface() {
return nil, fmt.Errorf("type sym %v refers to interface type", typ)
}
for _, m := range name.Type().Methods() {
if m.Sym == meth {