[dev.ssa] cmd/compile/internal/ssa: add line numbers to Values

Change-Id: I1dfffd75cc1f49307c654f910f7133c03da6c84f
Reviewed-on: https://go-review.googlesource.com/10559
Reviewed-by: Keith Randall <khr@golang.org>
diff --git a/src/cmd/compile/internal/ssa/value.go b/src/cmd/compile/internal/ssa/value.go
index 08e368a..f249bba 100644
--- a/src/cmd/compile/internal/ssa/value.go
+++ b/src/cmd/compile/internal/ssa/value.go
@@ -30,6 +30,9 @@
 	// Containing basic block
 	Block *Block
 
+	// Source line number
+	Line int32
+
 	// Storage for the first two args
 	argstorage [2]*Value
 }