Test a for loop with no body.

Test/baseResults/spv.for-nobody.vert.out

+spv.for-nobody.vert
+Warning, version 450 is not yet complete; most version-specific features are present, but some are missing.
+
+
+Linked vertex stage:
+
+
+// Module Version 10000
+// Generated by (magic number): 80001
+// Id's are bound by 27
+
+                              Capability Shader
+               1:             ExtInstImport  "GLSL.std.450"
+                              MemoryModel Logical GLSL450
+                              EntryPoint Vertex 4  "main" 22 25 26
+                              Source GLSL 450
+                              Name 4  "main"
+                              Name 8  "i"
+                              Name 22  "r"
+                              Name 25  "gl_VertexID"
+                              Name 26  "gl_InstanceID"
+                              Decorate 22(r) Location 0
+                              Decorate 25(gl_VertexID) BuiltIn VertexId
+                              Decorate 26(gl_InstanceID) BuiltIn InstanceId
+               2:             TypeVoid
+               3:             TypeFunction 2
+               6:             TypeInt 32 1
+               7:             TypePointer Function 6(int)
+               9:      6(int) Constant 0
+              15:      6(int) Constant 10
+              16:             TypeBool
+              19:      6(int) Constant 1
+              21:             TypePointer Output 6(int)
+           22(r):     21(ptr) Variable Output
+              24:             TypePointer Input 6(int)
+ 25(gl_VertexID):     24(ptr) Variable Input
+26(gl_InstanceID):     24(ptr) Variable Input
+         4(main):           2 Function None 3
+               5:             Label
+            8(i):      7(ptr) Variable Function
+                              Store 8(i) 9
+                              Branch 13
+              10:             Label
+                              Branch 12
+              11:             Label
+              23:      6(int) Load 8(i)
+                              Store 22(r) 23
+                              Return
+              12:             Label
+              18:      6(int) Load 8(i)
+              20:      6(int) IAdd 18 19
+                              Store 8(i) 20
+                              Branch 13
+              13:             Label
+              14:      6(int) Load 8(i)
+              17:    16(bool) SLessThan 14 15
+                              LoopMerge 11 12 None
+                              BranchConditional 17 10 11
+                              FunctionEnd

Test/spv.for-nobody.vert

+#version 450
+layout(location=0) out highp int r;
+void main() {
+  int i;
+  for (i=0; i<10; i++);
+  r = i;
+}