compiler: implement make([]T, ...)

src/examples/test/test.go

@@ -35,8 +35,11 @@ func main() {
 	readMap(testmap, "data")
 
 	// slice
+	l := 5
 	foo := []int{1, 2, 4, 5}
+	bar := make([]byte, l-2, l)
 	println("len/cap foo:", len(foo), cap(foo))
+	println("len/cap bar:", len(bar), cap(bar))
 	println("foo[3]:", foo[3])
 	println("sum foo:", sum(foo))
 

src/runtime/runtime.go

@@ -99,10 +99,18 @@ func lookupBoundsCheck(length, index int) {
 	}
 }
 
-// Check for bounds in *ssa.Slice
+// Check for bounds in *ssa.Slice.
 func sliceBoundsCheck(length, low, high uint) {
 	if !(0 <= low && low <= high && high <= length) {
 		printstring("panic: runtime error: slice out of range\n")
 		abort()
 	}
 }
+
+// Check for bounds in *ssa.MakeSlice.
+func sliceBoundsCheckMake(length, capacity uint) {
+	if !(0 <= length && length <= capacity) {
+		printstring("panic: runtime error: slice size out of range\n")
+		abort()
+	}
+}