[dev.cc] cmd/5g etc: code cleanup: delay var decls and eliminate dead code
Ran rsc.io/grind rev 6f0e601 on the source files.
The cleanups move var declarations as close to the use
as possible, splitting disjoint uses of the var into separate
variables. They also remove dead code (especially in
func sudoaddable), which helps with the var moving.
There's more cleanup to come, but this alone cuts the
time spent compiling html/template on my 2013 MacBook Pro
from 3.1 seconds to 2.3 seconds.
Change-Id: I4de499f47b1dd47a560c310bbcde6b08d425cfd6
Reviewed-on: https://go-review.googlesource.com/5637
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/src/cmd/internal/gc/bv.go b/src/cmd/internal/gc/bv.go
index 002b5a4..e7fdd70 100644
--- a/src/cmd/internal/gc/bv.go
+++ b/src/cmd/internal/gc/bv.go
@@ -63,16 +63,13 @@
}
func bvconcat(src1 *Bvec, src2 *Bvec) *Bvec {
- var dst *Bvec
- var i int32
-
- dst = bvalloc(src1.n + src2.n)
- for i = 0; i < src1.n; i++ {
+ dst := bvalloc(src1.n + src2.n)
+ for i := int32(0); i < src1.n; i++ {
if bvget(src1, i) != 0 {
bvset(dst, i)
}
}
- for i = 0; i < src2.n; i++ {
+ for i := int32(0); i < src2.n; i++ {
if bvget(src2, i) != 0 {
bvset(dst, i+src1.n)
}
@@ -90,8 +87,6 @@
// bvnext returns the smallest index >= i for which bvget(bv, i) == 1.
// If there is no such index, bvnext returns -1.
func bvnext(bv *Bvec, i int32) int {
- var w uint32
-
if i >= bv.n {
return -1
}
@@ -110,7 +105,7 @@
}
// Find 1 bit.
- w = bv.b[i>>WORDSHIFT] >> uint(i&WORDMASK)
+ w := bv.b[i>>WORDSHIFT] >> uint(i&WORDMASK)
for w&1 == 0 {
w >>= 1
@@ -121,9 +116,7 @@
}
func bvisempty(bv *Bvec) bool {
- var i int32
-
- for i = 0; i < bv.n; i += WORDBITS {
+ for i := int32(0); i < bv.n; i += WORDBITS {
if bv.b[i>>WORDSHIFT] != 0 {
return false
}
@@ -173,21 +166,17 @@
}
func bvprint(bv *Bvec) {
- var i int32
-
fmt.Printf("#*")
- for i = 0; i < bv.n; i++ {
+ for i := int32(0); i < bv.n; i++ {
fmt.Printf("%d", bvget(bv, i))
}
}
func bvreset(bv *Bvec, i int32) {
- var mask uint32
-
if i < 0 || i >= bv.n {
Fatal("bvreset: index %d is out of bounds with length %d\n", i, bv.n)
}
- mask = ^(1 << uint(i%WORDBITS))
+ mask := uint32(^(1 << uint(i%WORDBITS)))
bv.b[i/WORDBITS] &= mask
}
@@ -198,11 +187,9 @@
}
func bvset(bv *Bvec, i int32) {
- var mask uint32
-
if i < 0 || i >= bv.n {
Fatal("bvset: index %d is out of bounds with length %d\n", i, bv.n)
}
- mask = 1 << uint(i%WORDBITS)
+ mask := uint32(1 << uint(i%WORDBITS))
bv.b[i/WORDBITS] |= mask
}
