llvm-project/llvm/test/Transforms/Inline/invoke_test-2.ll

; Test that if an invoked function is inlined, and if that function cannot
; throw, that the dead handler is now unreachable.

; RUN: opt < %s -inline -simplifycfg -S | \
; RUN:   not grep UnreachableExceptionHandler

declare void @might_throw()

define internal i32 @callee() {
        invoke void @might_throw( )
                        to label %cont unwind label %exc

cont:           ; preds = %0
        ret i32 0

exc:            ; preds = %0
        %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
                 cleanup
        ret i32 1
}

; caller returns true if might_throw throws an exception... callee cannot throw.
define i32 @caller() {
        %X = invoke i32 @callee( )
                        to label %cont unwind label %UnreachableExceptionHandler                ; <i32> [#uses=1]

cont:           ; preds = %0
        ret i32 %X

UnreachableExceptionHandler:            ; preds = %0
        %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
                 cleanup
        ret i32 -1
}

declare i32 @__gxx_personality_v0(...)