blob: d68cbd8d1534685b8d0aba7c3c13ef1db671d0e1 [file] [log] [blame]
; Test for a problem afflicting several C++ programs in the testsuite. The
; instcombine pass is trying to get rid of the cast in the invoke instruction,
; inserting a cast of the return value after the PHI instruction, but which is
; used by the PHI instruction. This is bad: because of the semantics of the
; invoke instruction, we really cannot perform this transformation at all at
; least without splitting the critical edge.
;
; RUN: opt < %s -passes=instcombine -disable-output
declare ptr @test()
define i32 @foo() personality ptr @__gxx_personality_v0 {
entry:
br i1 true, label %cont, label %call
call: ; preds = %entry
%P = invoke ptr @test( )
to label %cont unwind label %N ; <ptr> [#uses=1]
cont: ; preds = %call, %entry
%P2 = phi ptr [ %P, %call ], [ null, %entry ] ; <ptr> [#uses=1]
%V = load i32, ptr %P2 ; <i32> [#uses=1]
ret i32 %V
N: ; preds = %call
%exn = landingpad {ptr, i32}
cleanup
ret i32 0
}
declare i32 @__gxx_personality_v0(...)