forked from OSchip/llvm-project
25 lines
797 B
LLVM
25 lines
797 B
LLVM
|
; 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: llvm-upgrade < %s | llvm-as | opt -instcombine -disable-output
|
||
|
|
|
||
|
|
declare sbyte* %test()
|
||
|
|
|
||
|
|
int %foo() {
|
||
|
|
entry:
|
||
|
|
br bool true, label %cont, label %call
|
||
|
|
call:
|
||
|
|
%P = invoke int*()* cast (sbyte*()* %test to int*()*)()
|
||
|
|
to label %cont except label %N
|
||
|
|
cont:
|
||
|
|
%P2 = phi int* [%P, %call], [null, %entry]
|
||
|
|
%V = load int* %P2
|
||
|
|
ret int %V
|
||
|
|
N:
|
||
|
|
ret int 0
|
||
|
|
}
|