llvm-6502/test/Transforms/CondProp/phisimplify2.ll
Chris Lattner 2733b30195 new testcase that condprop should handle. The PHI node becomes useless
after threading the branch, because both operands are the same value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22668 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-05 00:59:55 +00:00

37 lines
647 B
LLVM

; RUN: llvm-as < %s | opt -condprop | llvm-dis | not grep phi
declare bool %foo()
int %test(uint %C) {
%Val = call bool %foo()
switch uint %C, label %T1 [
uint 4, label %T2
uint 17, label %T3
]
T1:
call void %a()
br label %Cont
T2:
call void %b()
br label %Cont
T3:
call void %c()
br label %Cont
Cont:
;; PHI becomes dead after threading T2
%C2 = phi bool [%Val, %T1], [true, %T2], [%Val, %T3]
br bool %C2, label %L2, label %F2
L2:
call void %d()
ret int 17
F2:
call void %e()
ret int 1
}
declare void %a()
declare void %b()
declare void %c()
declare void %d()
declare void %e()