Per the latest spec change, Go doesn't have -0 constants.
Change-Id: Ic2bcdc3bf507d121ed204f30f6744bb8764202c0
Reviewed-on: https://go-review.googlesource.com/16232
Reviewed-by: Chris Manghane <cmang@golang.org>
The -msan option causes the compiler to add instrumentation for the
C/C++ memory sanitizer. Every memory read/write will be preceded by
a call to msanread/msanwrite.
This CL passes tests but is not usable by itself. The actual
implementation of msanread/msanwrite in the runtime package, and support
for -msan in the go tool and the linker, and tests, will follow in
subsequent CLs.
Change-Id: I3d517fb3e6e65d9bf9433db070a420fd11f57816
Reviewed-on: https://go-review.googlesource.com/16160
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is mechanical change that is a step toward reusing the racewalk
pass for a more general instrumentation pass. The first use will be to
add support for the memory sanitizer.
Change-Id: I75b93b814ac60c1db1660e0b9a9a7d7977d86939
Reviewed-on: https://go-review.googlesource.com/16105
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Small fix: looks like a short variable declaration with a type switch
checks to make sure the variable used had valid shape (ONAME, OTYPE, or
ONONAME) and rejects everything else. Then a new variable is declared.
If the symbol contained in the declaration was a named OLITERAL (still a
valid identifier obviously) it would be rejected, even though a new
variable would have been declared.
Fix adds this case to the check.
Added a test case from issue12413.
Fixes#12413
Change-Id: I150dadafa8ee5612c867d58031027f2dca8c6ebc
Reviewed-on: https://go-review.googlesource.com/15760
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Use a go:norace comment rather than having the compiler know the special
name syscall.forkAndExecInChild.
Change-Id: I69bc6aa6fc40feb2148d23f269ff32453696fb28
Reviewed-on: https://go-review.googlesource.com/16097
Reviewed-by: Minux Ma <minux@golang.org>
Just a comment change reflecting that the files were moved to the
builtin directory when the compiled was converted from C to Go.
Change-Id: I65e5340c09221684e40174feadfb69f738a9044a
Reviewed-on: https://go-review.googlesource.com/16089
Reviewed-by: Minux Ma <minux@golang.org>
Only effect is register related: do not allocate R2 or R12, put function
entrypoint in R12 before indirect call.
Change-Id: I9cdd553bab022601c9cb5bb43c9dc0c368c6fb0a
Reviewed-on: https://go-review.googlesource.com/15961
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Shared libraries on ppc64le will require a larger minimum stack frame (because
the ABI mandates that the TOC pointer is available at 24(R1)). Part 2a of
preparing for that is to have all bits of arch-independent and ppc64-specific
codegen that need to know call a function to find out.
Change-Id: I55899f73037e92227813c491049a3bd6f30bd41f
Reviewed-on: https://go-review.googlesource.com/15524
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Apply static bounds checking logic during type checking even to
zero-element arrays, but skip synthesized OINDEX nodes that the
compiler has asserted are within bounds (such as the ones generated
while desugaring ORANGE nodes). This matches the logic in walkexpr
that also skips static bounds checking when Bounded is true.
Passes toolstash/buildall.
Fixes#12944.
Change-Id: I14ba03d71c002bf969d69783bec8d1a8e10e7d75
Reviewed-on: https://go-review.googlesource.com/15902
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
No functional change and passes toolstash/buildall, but eliminates a
13-deep nesting of if statements.
Change-Id: I32e63dcf358c6eb521935f4ee07fbe749278e5ef
Reviewed-on: https://go-review.googlesource.com/15901
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Remove another use of NodeList.
Change-Id: Ice07eff862caf715f722dec7829006bf71715b07
Reviewed-on: https://go-review.googlesource.com/15432
Reviewed-by: Dave Cheney <dave@cheney.net>
Following the C to Go translation, some useless variables
were left in the code. In fmt.go, this was harmless.
In lex.go, it broke the error message related to
non-canonical import paths.
Fix it, and remove the useless variables.
The added test case is ignored in the go/types tests, since
the behavior of the non-canonical import path check seems
to be different.
Fixes#11362
Change-Id: Ic9129139ede90357dc79ebf167af638cf44536fa
Reviewed-on: https://go-review.googlesource.com/15580
Reviewed-by: Marvin Stenger <marvin.stenger94@gmail.com>
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
In CL 14836, the implementation of duffcopy on amd64
was changed to replace the use of the MOVQ instructions
by MOVUPS.
However, it broke the build on plan9/amd64, since
Plan 9 doesn't allow floating point in note handler.
This change disables the use of duffcopy on Plan 9.
Fixes#12829.
Change-Id: Ifd5b17b17977a1b631b16c3dfe2dc7ab4ad00507
Reviewed-on: https://go-review.googlesource.com/15421
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This lets us re-enable duffzero.
Fixes#12108
Change-Id: Iefd24d26eaa56067caa2c29ff99cd20a42d8714a
Reviewed-on: https://go-review.googlesource.com/14937
Reviewed-by: Keith Randall <khr@golang.org>
ppc64 codegen assumes that it is OK to stomp on r31 at any time, but it is not
excluded from the set of registers that regopt is allowed to use.
Fixes#12597
Change-Id: I29c7655e32abd22f3c21d88427b73e4fca055233
Reviewed-on: https://go-review.googlesource.com/15245
Reviewed-by: Minux Ma <minux@golang.org>
Turns out the summary information for the ... args was
already correctly computed, all that lacked was to make
use of it and correct tests that documented our prior
deficiencies.
Fixes#12006
Change-Id: Ie8adfab7547f179391d470679598f0904aabf9f7
Reviewed-on: https://go-review.googlesource.com/15200
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Commit acc90c5 passed the trybots, lingered for weeks, and in the
meantime the type of this variable changed to a bool. I didn't rebase
and re-run the trybots before submitting.
Fixes#12832
Change-Id: If24fda227edd8207f8069c67f1c45f08e6ac215a
Reviewed-on: https://go-review.googlesource.com/15286
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Internal error arose from calling methodfunc on a invalid interface
field during the implements check. int obviously isn't a function,
and errors on getinarg...
for im := iface.Type; im != nil; im = im.Down {
imtype = methodfunc(im.Type, nil)
// ...
}
Fix handles the internal compiler error, but does not throw an
additional error, i.e. the following code will error on the I
interface, but type A will pass the implements check since
'Read(string) string' is implemented and 'int' is skipped
type I interface {
Read(string) string
int
}
type A struct {
}
func (a *A) Read(s string) string {
return s
}
func New() I {
return new(A)
}
Fixes#10975
Change-Id: I4b54013afb2814db3f315515f0c742d8631ca500
Reviewed-on: https://go-review.googlesource.com/13747
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The existing test did not take into account the implicit
dereference of &fixedArray and thus heap-escaped when it
was not necessary.
Also added a detailed test for this and related cases.
Fixes#12588
Change-Id: I951e9684a093082ccdca47710f69f4366bd6b3cf
Reviewed-on: https://go-review.googlesource.com/15130
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Inlined the last occurrence of stringsCompare into exprcmp.
Passes go build -a -toolexec 'toolstash -cmp' std cmd.
Change-Id: I8fd99e3fbffc84283cc269368595cba950533066
Reviewed-on: https://go-review.googlesource.com/14872
Reviewed-by: Dave Cheney <dave@cheney.net>
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Generate slices of method *Sig(nature)s instead of linked lists.
Remove custom lsort function in favor of sort.Interface.
Eliminates another use of stringsCompare.
Passes go build -a -toolexec 'toolstash -cmp' std cmd.
Change-Id: I9ed1664b7f55be9e967dd7196e396a76f6ea3422
Reviewed-on: https://go-review.googlesource.com/14559
Reviewed-by: Dave Cheney <dave@cheney.net>
intLiteral is used by the gins wrappers in arm64, ppc64 and
mips64. Refactor the function to a method on gc.Node and update
the callers to use the common copy.
Change-Id: I2db90d801a9cb18f8526eb921e13daa75ca1cf6f
Reviewed-on: https://go-review.googlesource.com/14744
Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
Reviewed-by: Dave Cheney <dave@cheney.net>
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This one of a set of changes to make the transition away from NodeList
easier by removing cases in which NodeList doesn't act semi-trivially like a
[]*Node.
This CL was originally prepared by Josh Bleecher Snyder <josharian@gmail.com>.
This change passes go build -toolexec 'toolstash -cmp' -a std.
Change-Id: Ifd73501e06e8ea5efd028b6d473b3e5d1b07a5ac
Reviewed-on: https://go-review.googlesource.com/14570
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
A followup CL will rewrite listsort to use the new cmpstackvarlt and
change cmpstackvar to avoid stringsCompare.
Change-Id: Idf0857a3bd67f9e2243ba82aa0bff510612927c3
Reviewed-on: https://go-review.googlesource.com/14611
Reviewed-by: Dave Cheney <dave@cheney.net>
Made use of range statement in for loops.
Cleaning along the way:
-remove unnecessary variable declarations
-rename variables
-remove dead code
This change passes go build -toolexec 'toolstash -cmp' -a std.
Change-Id: Ife8c2a98482a81ba91f5bbb65142d9f3dc46d6ee
Reviewed-on: https://go-review.googlesource.com/14379
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
Found with https://github.com/remyoudompheng/go-misc/deadcode:
deadcode: walk.go:2228:1: applywritebarrier_bv is unused
deadcode: subr.go:355:1: gethunk is unused
deadcode: subr.go:1991:1: localexpr is unused
deadcode: dcl.go:82:1: poptodcl is unused
deadcode: swt.go:810:1: dumpcase is unused
deadcode: esc.go:251:1: satAdd8 is unused
deadcode: esc.go:387:1: outputsPerTag is unused
deadcode: obj.go:190:1: duint64 is unused
deadcode: obj.go:287:1: dstringptr is unused
deadcode: plive.go:95:1: xmalloc is unused
deadcode: plive.go:119:1: freeblock is unused
followed by
deadcode: go.go:633:1: hunk is unused
deadcode: go.go:635:1: nhunk is unused
deadcode: go.go:637:1: thunk is unused
after 'gethunk' was removed.
Some dead code in bv.go, mparith3.go, and dcl.go was left as is.
Passes go build -a -toolexec 'toolstash -cmp' std cmd.
Change-Id: Ia63519adedc8650d7095572ddd454fd923d3204d
Reviewed-on: https://go-review.googlesource.com/14610
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Remove several uses of stringsCompare.
Passes go build -a -toolexec 'toolstash -cmp' std cmd.
Change-Id: I3f2323df2ad8c03bad77e0a91d6e2e714803705b
Reviewed-on: https://go-review.googlesource.com/14556
Reviewed-by: Dave Cheney <dave@cheney.net>
Aeshash currently computes the hash of the empty string as
hash("", seed) = seed. This is bad because the hash of a compound
object with empty strings in it doesn't include information about
where those empty strings were. For instance [2]string{"", "foo"}
and [2]string{"foo", ""} might get the same hash.
Fix this by returning a scrambled seed instead of the seed itself.
With this fix, we can remove the scrambling done by the generated
array hash routines.
The test also rejects hash("", seed) = 0, if we ever thought
it would be a good idea to try that.
The fallback hash is already OK in this regard.
Change-Id: Iaedbaa5be8d6a246dc7e9383d795000e0f562037
Reviewed-on: https://go-review.googlesource.com/14129
Reviewed-by: jcd . <jcd@golang.org>
Cleaning along the way:
-convert variable types from int to bool
-remove unnecessary functions
-remove unnecessary type conversion
-remove unnecessary variable declarations
-transform struct{string,string} with lookup to map[string]string
This change passes go build -toolexec 'toolstash -cmp' -a std.
Change-Id: I259728fe4afd7f23b67f08fab856ce0abee57b21
Reviewed-on: https://go-review.googlesource.com/14435
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Although bnum was being called with a Bits value, a limitation
of the escape analyser (golang/go#12588) meant that taking the
address of the Bits.b array in the range statement caused the
formal parameter to escape to the heap.
Passing the a pointer to a Bits, as with all the other Bits helper
methods avoids the allocation.
Before:
BenchmarkBnum1-4 20000000 69.6 ns/op 32 B/op 1 allocs/op
After:
BenchmarkBnum1-4 100000000 10.1 ns/op 0 B/op 0 allocs/op
Change-Id: I673bd57ddc032ee67d09474156d795fb1ba72018
Reviewed-on: https://go-review.googlesource.com/14501
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Simplify slice/map literal expressions.
Caught with gofmt -d -s, fixed with gofmt -w -s
Checked that the result can still be compiled with Go 1.4.
Change-Id: I201cd90fdfb8de2971c46ad7fce64111152b697e
Reviewed-on: https://go-review.googlesource.com/13832
Reviewed-by: Andrew Gerrand <adg@golang.org>
This one of a set of changes to make the transition away from NodeList
easier by removing cases in which NodeList doesn't act semi-trivially like a
[]*Node.
This CL was originally prepared by Josh Bleecher Snyder <josharian@gmail.com>.
This change passes go build -toolexec 'toolstash -cmp' -a std.
Change-Id: Ie02d2cf35f1e8438c6e9dc1d5fba51e8adde1bc0
Reviewed-on: https://go-review.googlesource.com/14480
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
