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2 Commits

Author SHA1 Message Date
Matthew Dempsky
999589e148 test: use dot-relative imports where appropriate
Currently, run.go's *dir tests allow "x.go" to be imported
interchangeably as either "x" or "./x". This is generally fine, but
can cause problems when "x" is the name of a standard library
package (e.g., "fixedbugs/bug345.dir/io.go").

This CL is an automated rewrite to change all `import "x"` directives
to use `import "./x"` instead. It has no effect today, but will allow
subsequent CLs to update test/run.go to resolve "./x" to "test/x" to
avoid stdlib collisions.

Change-Id: Ic76cd7140e83b47e764f8a499e59936be2b3c876
Reviewed-on: https://go-review.googlesource.com/c/go/+/395116
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-03-24 02:14:15 +00:00
Keith Randall
b730a26729 [dev.typeparams] cmd/compile: put shape types in their own package
Put shape types in the top level package called ".shape".
Name them using the serialization of the shape name, instead of
the .shapeN names.

This allows the linker to deduplicate instantiations across packages.

Not sure that this is entirely correct, as shapes in this package
may reference other packages (e.g. a field of a struct). But it seems
to work for now.

For the added test, when you look at the resulting binary (use the -k
option with run.go) it has only one instantiation of F, and 4 call sites:

$ objdump -d a.exe | grep _a\.F
 1053cb0:	e8 8b 00 00 00 	callq	139 <_a.F[.shape.*uint8]>
 1053ce9:	e8 52 00 00 00 	callq	82 <_a.F[.shape.*uint8]>
_a.F[.shape.*uint8]:
 1053d90:	e8 ab ff ff ff 	callq	-85 <_a.F[.shape.*uint8]>
 1053dc9:	e8 72 ff ff ff 	callq	-142 <_a.F[.shape.*uint8]>

Change-Id: I627f7e50210aabe4a10d0e2717d87b75ac82e99b
Reviewed-on: https://go-review.googlesource.com/c/go/+/339595
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-08-04 17:56:00 +00:00