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Add a testcase for PR4569, which is now fixed.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76526 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-07-21 00:50:52 +00:00
parent 0b106d9627
commit 19211b47cc
1 changed files with 24 additions and 0 deletions
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test/Analysis/ScalarEvolution/zext-wrap.ll Normal file
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@ -0,0 +1,24 @@
; RUN: llvm-as < %s | opt -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
}