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-rw-r--r--test/fixedbugs/bug453.go39
1 files changed, 39 insertions, 0 deletions
diff --git a/test/fixedbugs/bug453.go b/test/fixedbugs/bug453.go
new file mode 100644
index 0000000..1f4f3ea
--- /dev/null
+++ b/test/fixedbugs/bug453.go
@@ -0,0 +1,39 @@
+// run
+
+// Copyright 2012 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.
+
+// Issue 4138: bug in floating-point registers numbering.
+// Makes 6g unable to use more than 11 registers.
+
+package main
+
+func formula() float32 {
+ mA := [1]float32{1.0}
+ det1 := mA[0]
+ det2 := mA[0]
+ det3 := mA[0]
+ det4 := mA[0]
+ det5 := mA[0]
+ det6 := mA[0]
+ det7 := mA[0]
+ det8 := mA[0]
+ det9 := mA[0]
+ det10 := mA[0]
+ det11 := mA[0]
+ det12 := mA[0]
+
+ return det1 + det2*det3 +
+ det4*det5 + det6*det7 +
+ det8*det9 + det10*det11 +
+ det12
+}
+
+func main() {
+ x := formula()
+ if x != 7.0 {
+ println(x, 7.0)
+ panic("x != 7.0")
+ }
+}