diff --git a/src/cmd/compile/internal/ssa/decompose.go b/src/cmd/compile/internal/ssa/decompose.go
index ea988e44f6..ba48b6b3b9 100644
--- a/src/cmd/compile/internal/ssa/decompose.go
+++ b/src/cmd/compile/internal/ssa/decompose.go
@@ -24,7 +24,7 @@ func decomposeBuiltIn(f *Func) {
 	}
 
 	// Decompose other values
-	// Note: deadcode is false because we need to keep the original
+	// Note: Leave dead values because we need to keep the original
 	// values around so the name component resolution below can still work.
 	applyRewrite(f, rewriteBlockdec, rewriteValuedec, leaveDeadValues)
 	if f.Config.RegSize == 4 {
diff --git a/src/cmd/compile/internal/ssa/rewrite.go b/src/cmd/compile/internal/ssa/rewrite.go
index 07bbdb8813..5c56b2b346 100644
--- a/src/cmd/compile/internal/ssa/rewrite.go
+++ b/src/cmd/compile/internal/ssa/rewrite.go
@@ -27,7 +27,7 @@ const (
 	removeDeadValues                 = true
 )
 
-// deadcode indicates that rewrite should try to remove any values that become dead.
+// deadcode indicates whether rewrite should try to remove any values that become dead.
 func applyRewrite(f *Func, rb blockRewriter, rv valueRewriter, deadcode deadValueChoice) {
 	// repeat rewrites until we find no more rewrites
 	pendingLines := f.cachedLineStarts // Holds statement boundaries that need to be moved to a new value/block
diff --git a/src/cmd/compile/internal/ssa/value.go b/src/cmd/compile/internal/ssa/value.go
index c20fc87e90..6cc2b2ab8b 100644
--- a/src/cmd/compile/internal/ssa/value.go
+++ b/src/cmd/compile/internal/ssa/value.go
@@ -499,7 +499,7 @@ func (v *Value) removeable() bool {
 		return false
 	}
 	if v.Type.IsMemory() {
-		// All memory ops aren't needed here, but we do need
+		// We don't need to preserve all memory ops, but we do need
 		// to keep calls at least (because they might have
 		// synchronization operations we can't see).
 		return false