diff --git a/src/cmd/compile/internal/ssa/regalloc.go b/src/cmd/compile/internal/ssa/regalloc.go
index f3c1d3bd968..43669fd143c 100644
--- a/src/cmd/compile/internal/ssa/regalloc.go
+++ b/src/cmd/compile/internal/ssa/regalloc.go
@@ -1725,10 +1725,9 @@ func (s *regAllocState) regalloc(f *Func) {
 					// spilling the value with the most distant next use.
 					continue
 				}
-				// Copy input to a new clobberable register.
+				// Copy input to a different register that won't be clobbered.
 				c := s.allocValToReg(v.Args[i], m, true, v.Pos)
 				s.copies[c] = false
-				args[i] = c
 			}
 
 			// Pick a temporary register if needed.
diff --git a/test/fixedbugs/issue75063.go b/test/fixedbugs/issue75063.go
new file mode 100644
index 00000000000..5caa7cb9abb
--- /dev/null
+++ b/test/fixedbugs/issue75063.go
@@ -0,0 +1,75 @@
+// compile
+
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package reorder
+
+type Element struct {
+	A     string
+	B     string
+	C     string
+	D     string
+	E     string
+	Text  []string
+	List  []string
+	Child Elements
+	F     string
+	G     bool
+	H     bool
+	I     string
+}
+
+type Elements []Element
+
+func DoesNotCompile(ve Elements) Elements {
+	aa := Elements{}
+	bb := Elements{}
+	cc := Elements{}
+	dd := Elements{}
+	ee := Elements{}
+	ff := Elements{}
+	gg := Elements{}
+	hh := Elements{}
+	ii := Elements{}
+
+	if len(ve) != 1 {
+		return ve
+	}
+	for _, e := range ve[0].Child {
+		if len(e.Text) == 1 && (e.Text[0] == "xx") {
+			ee = append(ee, e)
+		} else if len(e.Text) == 1 && e.Text[0] == "yy" {
+			for _, c := range e.Child {
+				if len(c.Text) == 1 && c.Text[0] == "zz" {
+					ii = append(ii, c)
+				} else {
+					hh = append(hh, c)
+				}
+			}
+			ii = append(ii, hh...)
+			e.Child = ii
+			gg = append(gg, e)
+		} else if len(e.Text) == 1 && e.Text[0] == "tt" {
+			for _, entry := range e.Child {
+				for _, c := range entry.Child {
+					if len(c.Text) == 1 && c.Text[0] == "ee" {
+						cc = append(cc, c)
+					} else {
+						dd = append(dd, c)
+					}
+				}
+				cc = append(cc, dd...)
+				entry.Child = cc
+				bb = append(bb, entry)
+				cc, dd = Elements{}, Elements{}
+			}
+			e.Child = bb
+			aa = append(aa, e)
+		} else {
+			ff = append(ff, e)
+		}
+	}
+	return ve
+}