llvm/test/Transforms/InstCombine/2004-01-13-InstCombineInvokePHI.ll
Dan Gohman f2f6ce65b7 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11 18:01:28 +00:00

29 lines
1012 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: opt < %s -instcombine -disable-output
declare i8* @test()
define i32 @foo() {
entry:
br i1 true, label %cont, label %call
call: ; preds = %entry
%P = invoke i32* bitcast (i8* ()* @test to i32* ()*)( )
to label %cont unwind label %N ; <i32*> [#uses=1]
cont: ; preds = %call, %entry
%P2 = phi i32* [ %P, %call ], [ null, %entry ] ; <i32*> [#uses=1]
%V = load i32* %P2 ; <i32> [#uses=1]
ret i32 %V
N: ; preds = %call
ret i32 0
}