[clang] [clang][FMV] Fix crash with cpu_specific attribute. (PR #115762)

[Alexandros Lamprineas via cfe-commits]

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@@ -114,8 +114,8 @@ void ThreeVersionsSameAttr(void){}
 // CHECK: define {{.*}}void @ThreeVersionsSameAttr.Z() #[[K]]
 
 ATTR(cpu_specific(knl))
-void CpuSpecificNoDispatch(void) {}
-// CHECK: define {{.*}}void @CpuSpecificNoDispatch.Z() #[[K:[0-9]+]]
+void CpuSpecificNoDispatch(void (*f)(void)) {}
+// CHECK: define {{.*}}void @CpuSpecificNoDispatch.Z(ptr noundef %f) #[[K:[0-9]+]]
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labrinea wrote:

The change is to trigger the crash. I am not sure why we are not crashing without an argument. I can add a new test then and keep this too.

https://github.com/llvm/llvm-project/pull/115762