3 files changed, 7 insertions, 7 deletions
diff --git a/src/cmd/compile/internal/ssa/loopbce.go b/src/cmd/compile/internal/ssa/loopbce.go
index aa6cc48cac..1aa987e5b6 100644
--- a/src/cmd/compile/internal/ssa/loopbce.go
+++ b/src/cmd/compile/internal/ssa/loopbce.go
@@ -84,7 +84,7 @@ func parseIndVar(ind *Value) (min, inc, nxt *Value, loopReturn Edge) {
 //
 //	 exit_loop:
 func findIndVar(f *Func) []indVar {
-	var iv []indVar
+	iv := make([]indVar, 0, len(f.Blocks))
 	sdom := f.Sdom()
 
 	for _, b := range f.Blocks {
diff --git a/src/cmd/compile/internal/ssa/regalloc.go b/src/cmd/compile/internal/ssa/regalloc.go
index a0257f3064..d51d41ed30 100644
--- a/src/cmd/compile/internal/ssa/regalloc.go
+++ b/src/cmd/compile/internal/ssa/regalloc.go
@@ -1000,10 +1000,10 @@ var tmpVal Value
 func (s *regAllocState) regalloc(f *Func) {
 	regValLiveSet := f.newSparseSet(f.NumValues()) // set of values that may be live in register
 	defer f.retSparseSet(regValLiveSet)
-	var oldSched []*Value
-	var phis []*Value
-	var phiRegs []register
-	var args []*Value
+	oldSched := make([]*Value, 0, len(s.visitOrder))
+	phis := make([]*Value, 0, len(s.visitOrder))
+	phiRegs := make([]register, 0, len(s.visitOrder))
+	args := make([]*Value, 0, len(s.visitOrder))
 
 	// Data structure used for computing desired registers.
 	var desired desiredState
@@ -2298,7 +2298,7 @@ func (s *regAllocState) placeSpills() {
 	}
 
 	// Insert spill instructions into the block schedules.
-	var oldSched []*Value
+	oldSched := make([]*Value, 0, len(s.visitOrder))
 	for _, b := range s.visitOrder {
 		nfirst := 0
 		for _, v := range b.Values {
diff --git a/src/cmd/compile/internal/ssa/schedule.go b/src/cmd/compile/internal/ssa/schedule.go
index 8006253145..a459eb4328 100644
--- a/src/cmd/compile/internal/ssa/schedule.go
+++ b/src/cmd/compile/internal/ssa/schedule.go
@@ -460,7 +460,7 @@ func storeOrder(values []*Value, sset *sparseSet, storeNumber []int32) []*Value
 		}
 		w = w.MemoryArg()
 	}
-	var stack []*Value
+	stack := make([]*Value, 0, len(values))
 	for _, v := range values {
 		if sset.contains(v.ID) {
 			// in sset means v is a store, or already pushed to stack, or already assigned a store number