cmd/compile: skip ssa/debug_test.go when gdb missing etc.

CL50610 broke the build for noopt (different inlining
behavior) and clang (no gdb) so it needs to catch those
cases and skip.

The run/no-run logic was slightly cleaned up,
the name of gdb on OSX was made more robust (tries gdb
first, then ggdb), and the file names were canonicalized
before loggging instead of in comparison to reduce
gratuitous noise in diffs when things aren't otherwise
equal.

This probably doesn't fix problems on Alpine, but it should
provide a cleaner and less confusing failure.

Change-Id: I26c65bff5a8d3d60f1cd6ae02a282558c53dda67
Reviewed-on: https://go-review.googlesource.com/69371
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>

5 files changed, 25 insertions, 745 deletions

diff --git a/src/cmd/compile/internal/ssa/testdata/hist-dbg.delve-nexts b/src/cmd/compile/internal/ssa/testdata/hist-dbg.delve-nexts
index cf0d34eb91..4e71550975 100644
--- a/src/cmd/compile/internal/ssa/testdata/hist-dbg.delve-nexts
+++ b/src/cmd/compile/internal/ssa/testdata/hist-dbg.delve-nexts
@@ -1,6 +1,6 @@
   ./testdata/hist.go
 35:	func main() {
-36:		hist := make([]int, 100)
+36:		hist := make([]int, 10)
 37:		var reader io.Reader = strings.NewReader(cannedInput) //gdb-dbg=(hist/A,cannedInput/A)
 38:		if len(os.Args) > 1 {
 43:				return
@@ -106,278 +106,8 @@
 60:			if a == 0 {
 61:				continue
 59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
 68:	}
-  /usr/local/google/home/drchase/work/go/src/runtime/proc.go
+  src/runtime/proc.go
 201:		if atomic.Load(&runningPanicDefers) != 0 {
 210:		if atomic.Load(&panicking) != 0 {
 214:		exit(0)
diff --git a/src/cmd/compile/internal/ssa/testdata/hist-dbg.gdb-nexts b/src/cmd/compile/internal/ssa/testdata/hist-dbg.gdb-nexts
index 39ed076e3a..5bb6102729 100644
--- a/src/cmd/compile/internal/ssa/testdata/hist-dbg.gdb-nexts
+++ b/src/cmd/compile/internal/ssa/testdata/hist-dbg.gdb-nexts
@@ -1,10 +1,10 @@
-  /usr/local/google/home/drchase/work/go/src/cmd/compile/internal/ssa/testdata/hist.go
+  src/cmd/compile/internal/ssa/testdata/hist.go
 35:	func main() {
 35:	func main() {
-36:		hist := make([]int, 100)
+36:		hist := make([]int, 10)
 37:		var reader io.Reader = strings.NewReader(cannedInput) //gdb-dbg=(hist/A,cannedInput/A)
-$1 = {array = <A>, len = 100, cap = 100}
-$2 = <A> "1\n1\n1\n1\n2\n2\n2\n4\n4\n8\n"
+$1 =  []int = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+$2 = "1\n1\n1\n1\n2\n2\n2\n4\n4\n8\n"
 38:		if len(os.Args) > 1 {
 43:				return
 47:		for scanner.Scan() {
@@ -131,278 +131,8 @@ $24 = 26
 60:			if a == 0 {
 61:				continue
 59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
-60:			if a == 0 {
-61:				continue
-59:		for i, a := range hist {
 68:	}
-  /usr/local/google/home/drchase/work/go/src/runtime/proc.go
+  src/runtime/proc.go
 201:		if atomic.Load(&runningPanicDefers) != 0 {
 201:		if atomic.Load(&runningPanicDefers) != 0 {
 210:		if atomic.Load(&panicking) != 0 {
diff --git a/src/cmd/compile/internal/ssa/testdata/hist-opt.delve-nexts b/src/cmd/compile/internal/ssa/testdata/hist-opt.delve-nexts
index 4e2584586d..659971991e 100644
--- a/src/cmd/compile/internal/ssa/testdata/hist-opt.delve-nexts
+++ b/src/cmd/compile/internal/ssa/testdata/hist-opt.delve-nexts
@@ -1,20 +1,20 @@
   ./testdata/hist.go
 35:	func main() {
-36:		hist := make([]int, 100)
+36:		hist := make([]int, 10)
 37:		var reader io.Reader = strings.NewReader(cannedInput) //gdb-dbg=(hist/A,cannedInput/A)
 13:		"strings"
-  /usr/local/google/home/drchase/work/go/src/strings/reader.go
+  src/strings/reader.go
 150:	func NewReader(s string) *Reader { return &Reader{s, 0, -1} }
   ./testdata/hist.go
 38:		if len(os.Args) > 1 {
 8:		"bufio"
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 84:			split:        ScanLines,
 74:		MaxScanTokenSize = 64 * 1024
   ./testdata/hist.go
 47:		for scanner.Scan() {
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -23,7 +23,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -32,7 +32,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -41,7 +41,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -50,7 +50,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -59,7 +59,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -68,7 +68,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -77,7 +77,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -86,7 +86,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -95,7 +95,7 @@
 55:			hist[int(i)]++
 55:			hist[int(i)]++
 47:		for scanner.Scan() {
-  /usr/local/google/home/drchase/work/go/src/bufio/scan.go
+  src/bufio/scan.go
 107:		return string(s.token)
   ./testdata/hist.go
 49:			i, err := strconv.ParseInt(s, 10, 64)
@@ -151,98 +151,8 @@
 59:		for i, a := range hist {
 65:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
 68:	}
-  /usr/local/google/home/drchase/work/go/src/runtime/proc.go
+  src/runtime/proc.go
 201:		if atomic.Load(&runningPanicDefers) != 0 {
 210:		if atomic.Load(&panicking) != 0 {
 214:		exit(0)
diff --git a/src/cmd/compile/internal/ssa/testdata/hist-opt.gdb-nexts b/src/cmd/compile/internal/ssa/testdata/hist-opt.gdb-nexts
index 4add645962..66c8bcd46d 100644
--- a/src/cmd/compile/internal/ssa/testdata/hist-opt.gdb-nexts
+++ b/src/cmd/compile/internal/ssa/testdata/hist-opt.gdb-nexts
@@ -1,7 +1,7 @@
-  /usr/local/google/home/drchase/work/go/src/cmd/compile/internal/ssa/testdata/hist.go
+  src/cmd/compile/internal/ssa/testdata/hist.go
 35:	func main() {
 35:	func main() {
-36:		hist := make([]int, 100)
+36:		hist := make([]int, 10)
 37:		var reader io.Reader = strings.NewReader(cannedInput) //gdb-dbg=(hist/A,cannedInput/A)
 13:		"strings"
 150:	func NewReader(s string) *Reader { return &Reader{s, 0, -1} }
@@ -117,98 +117,8 @@
 59:		for i, a := range hist {
 65:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
-60:			if a == 0 {
 68:	}
-  /usr/local/google/home/drchase/work/go/src/runtime/proc.go
+  src/runtime/proc.go
 201:		if atomic.Load(&runningPanicDefers) != 0 {
 201:		if atomic.Load(&runningPanicDefers) != 0 {
 210:		if atomic.Load(&panicking) != 0 {
diff --git a/src/cmd/compile/internal/ssa/testdata/hist.go b/src/cmd/compile/internal/ssa/testdata/hist.go
index 623e2f86f9..12ad09cdaa 100644
--- a/src/cmd/compile/internal/ssa/testdata/hist.go
+++ b/src/cmd/compile/internal/ssa/testdata/hist.go
@@ -33,7 +33,7 @@ var cannedInput string = `1
 `
 
 func main() {
-	hist := make([]int, 100)
+	hist := make([]int, 10)
 	var reader io.Reader = strings.NewReader(cannedInput) //gdb-dbg=(hist/A,cannedInput/A)
 	if len(os.Args) > 1 {
 		var err error