1 ; Test for a problem afflicting several C++ programs in the testsuite. The 2 ; instcombine pass is trying to get rid of the cast in the invoke instruction, 3 ; inserting a cast of the return value after the PHI instruction, but which is 4 ; used by the PHI instruction. This is bad: because of the semantics of the 5 ; invoke instruction, we really cannot perform this transformation at all at 6 ; least without splitting the critical edge. 7 ; 8 ; RUN: opt < %s -instcombine -disable-output 9 10 declare i8* @test() 11 12 define i32 @foo() personality i32 (...)* @__gxx_personality_v0 { 13 entry: 14 br i1 true, label %cont, label %call 15 16 call: ; preds = %entry 17 %P = invoke i32* bitcast (i8* ()* @test to i32* ()*)( ) 18 to label %cont unwind label %N ; <i32*> [#uses=1] 19 20 cont: ; preds = %call, %entry 21 %P2 = phi i32* [ %P, %call ], [ null, %entry ] ; <i32*> [#uses=1] 22 %V = load i32, i32* %P2 ; <i32> [#uses=1] 23 ret i32 %V 24 25 N: ; preds = %call 26 %exn = landingpad {i8*, i32} 27 cleanup 28 ret i32 0 29 } 30 31 declare i32 @__gxx_personality_v0(...) 32
