all: fix a bunch of misspellings

Change-Id: If2954bdfc551515403706b2cd0dde94e45936e08
GitHub-Last-Rev: d4cfc41a5504cf10befefdb881d4c45986a1d1f8
GitHub-Pull-Request: golang/go#28049
Reviewed-on: https://go-review.googlesource.com/c/140299
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

8 files changed, 8 insertions, 8 deletions

diff --git a/src/cmd/compile/doc.go b/src/cmd/compile/doc.go
index 0dfaacb584..b68314cf73 100644
--- a/src/cmd/compile/doc.go
+++ b/src/cmd/compile/doc.go
@@ -125,7 +125,7 @@ directive can skip over a directive like any other comment.
 // For a //line comment, this is the first character of the next line, and
 // for a /*line comment this is the character position immediately following the closing */.
 // If no filename is given, the recorded filename is empty if there is also no column number;
-// otherwise is is the most recently recorded filename (actual filename or filename specified
+// otherwise it is the most recently recorded filename (actual filename or filename specified
 // by previous line directive).
 // If a line directive doesn't specify a column number, the column is "unknown" until
 // the next directive and the compiler does not report column numbers for that range.
diff --git a/src/cmd/compile/internal/gc/syntax.go b/src/cmd/compile/internal/gc/syntax.go
index eb2ab6b916..ab65ddebb4 100644
--- a/src/cmd/compile/internal/gc/syntax.go
+++ b/src/cmd/compile/internal/gc/syntax.go
@@ -45,7 +45,7 @@ type Node struct {
 	// - ONAME nodes that refer to local variables use it to identify their stack frame position.
 	// - ODOT, ODOTPTR, and OINDREGSP use it to indicate offset relative to their base address.
 	// - OSTRUCTKEY uses it to store the named field's offset.
-	// - Named OLITERALs use it to to store their ambient iota value.
+	// - Named OLITERALs use it to store their ambient iota value.
 	// Possibly still more uses. If you find any, document them.
 	Xoffset int64
 
diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go
index 5aa2146a8c..1c398ef43c 100644
--- a/src/cmd/compile/internal/gc/walk.go
+++ b/src/cmd/compile/internal/gc/walk.go
@@ -34,7 +34,7 @@ func walk(fn *Node) {
 		}
 	}
 
-	// Propagate the used flag for typeswitch variables up to the NONAME in it's definition.
+	// Propagate the used flag for typeswitch variables up to the NONAME in its definition.
 	for _, ln := range fn.Func.Dcl {
 		if ln.Op == ONAME && (ln.Class() == PAUTO || ln.Class() == PAUTOHEAP) && ln.Name.Defn != nil && ln.Name.Defn.Op == OTYPESW && ln.Name.Used() {
 			ln.Name.Defn.Left.Name.SetUsed(true)
diff --git a/src/cmd/compile/internal/ssa/gen/PPC64.rules b/src/cmd/compile/internal/ssa/gen/PPC64.rules
index 7d79c9ad50..21c12591c5 100644
--- a/src/cmd/compile/internal/ssa/gen/PPC64.rules
+++ b/src/cmd/compile/internal/ssa/gen/PPC64.rules
@@ -956,7 +956,7 @@
 (MOVWZreg (MOVDconst [c])) -> (MOVDconst [int64(uint32(c))])
 
 
-// Lose widening ops fed to to stores
+// Lose widening ops fed to stores
 (MOVBstore [off] {sym} ptr (MOV(B|BZ|H|HZ|W|WZ)reg x) mem) -> (MOVBstore [off] {sym} ptr x mem)
 (MOVHstore [off] {sym} ptr (MOV(H|HZ|W|WZ)reg x) mem) -> (MOVHstore [off] {sym} ptr x mem)
 (MOVWstore [off] {sym} ptr (MOV(W|WZ)reg x) mem) -> (MOVWstore [off] {sym} ptr x mem)
diff --git a/src/cmd/compile/internal/ssa/layout.go b/src/cmd/compile/internal/ssa/layout.go
index 15e111ae7c..78d5dc77fe 100644
--- a/src/cmd/compile/internal/ssa/layout.go
+++ b/src/cmd/compile/internal/ssa/layout.go
@@ -12,7 +12,7 @@ func layout(f *Func) {
 }
 
 // Register allocation may use a different order which has constraints
-// imposed by the linear-scan algorithm. Note that that f.pass here is
+// imposed by the linear-scan algorithm. Note that f.pass here is
 // regalloc, so the switch is conditional on -d=ssa/regalloc/test=N
 func layoutRegallocOrder(f *Func) []*Block {
 
diff --git a/src/cmd/compile/internal/ssa/poset.go b/src/cmd/compile/internal/ssa/poset.go
index 37b607977c..0e0e2789b1 100644
--- a/src/cmd/compile/internal/ssa/poset.go
+++ b/src/cmd/compile/internal/ssa/poset.go
@@ -114,7 +114,7 @@ type posetNode struct {
 // given that non-equality is not transitive, the only effect is that a later call
 // to SetEqual for the same values will fail. NonEqual checks whether it is known that
 // the nodes are different, either because SetNonEqual was called before, or because
-// we know that that they are strictly ordered.
+// we know that they are strictly ordered.
 //
 // It is implemented as a forest of DAGs; in each DAG, if node A dominates B,
 // it means that A<B. Equality is represented by mapping two SSA values to the same
diff --git a/src/cmd/compile/internal/ssa/stackalloc.go b/src/cmd/compile/internal/ssa/stackalloc.go
index 8d0ab93c64..7612585136 100644
--- a/src/cmd/compile/internal/ssa/stackalloc.go
+++ b/src/cmd/compile/internal/ssa/stackalloc.go
@@ -212,7 +212,7 @@ func (s *stackAllocState) stackalloc() {
 					h := f.getHome(id)
 					if h != nil && h.(LocalSlot).N == name.N && h.(LocalSlot).Off == name.Off {
 						// A variable can interfere with itself.
-						// It is rare, but but it can happen.
+						// It is rare, but it can happen.
 						s.nSelfInterfere++
 						goto noname
 					}
diff --git a/src/cmd/compile/internal/types/pkg.go b/src/cmd/compile/internal/types/pkg.go
index e27c1fdba3..e502b986ae 100644
--- a/src/cmd/compile/internal/types/pkg.go
+++ b/src/cmd/compile/internal/types/pkg.go
@@ -135,7 +135,7 @@ func InternString(b []byte) string {
 	return s
 }
 
-// CleanroomDo invokes f in an environment with with no preexisting packages.
+// CleanroomDo invokes f in an environment with no preexisting packages.
 // For testing of import/export only.
 func CleanroomDo(f func()) {
 	saved := pkgMap