implement feedback

Author: ro-i

llvm/test/Verifier/AMDGPU/intrinsic-amdgpu-init-exec-from-input.ll

@@ -1,4 +1,4 @@
-; RUN: not llvm-as -o /dev/null 2>&1 %s | FileCheck %s
+; RUN: not llvm-as -disable-output 2>&1 %s | FileCheck %s
 
 ; Function Attrs: convergent nocallback nofree nounwind willreturn
 declare void @llvm.amdgcn.init.exec.from.input(i32, i32 immarg) #0
@@ -17,3 +17,11 @@ define amdgpu_ps void @init_exec_from_input_fail_not_inreg(i32 inreg %a, i32 %b)
   call void @llvm.amdgcn.init.exec.from.input(i32 %b, i32 0)
   ret void
 }
+
+; CHECK: only inreg arguments to the parent function are valid as inputs to this intrinsic
+; CHECK-NEXT: call void @llvm.amdgcn.init.exec.from.input(i32 %c, i32 0)
+define amdgpu_ps void @init_exec_from_input_fail_constant(i32 inreg %a, i32 %b) {
+  %c = add i32 %a, %b
+  call void @llvm.amdgcn.init.exec.from.input(i32 %c, i32 0)
+  ret void
+}