llvm-project/llvm/test/Analysis/ScalarEvolution/zext-wrap.ll

25 lines
652 B
LLVM

; RUN: opt < %s -analyze -scalar-evolution -disable-output \
; RUN: | FileCheck %s
; PR4569
define i16 @main() nounwind {
entry:
br label %bb.i
bb.i: ; preds = %bb1.i, %bb.nph
%l_95.0.i1 = phi i8 [ %tmp1, %bb.i ], [ 0, %entry ]
; This cast shouldn't be folded into the addrec.
; CHECK: %tmp = zext i8 %l_95.0.i1 to i16
; CHECK: --> (zext i8 {0,+,-1}<bb.i> to i16) Exits: 2
%tmp = zext i8 %l_95.0.i1 to i16
%tmp1 = add i8 %l_95.0.i1, -1
%phitmp = icmp eq i8 %tmp1, 1
br i1 %phitmp, label %bb1.i.func_36.exit_crit_edge, label %bb.i
bb1.i.func_36.exit_crit_edge:
ret i16 %tmp
}