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Add a test for the LSR issue exposed by r125254. 

llvm-svn: 125325
This commit is contained in:
Cameron Zwarich 2011-02-11 00:49:27 +00:00
parent 68051a74ec
commit 4c898c239e
1 changed files with 32 additions and 0 deletions
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32
llvm/test/Transforms/LoopStrengthReduce/hoist-parent-preheader.ll Normal file
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; RUN: opt < %s -loop-reduce -verify
target triple = "x86_64-apple-darwin10"
define void @myquicksort(i8* %a) nounwind ssp {
entry:
br i1 undef, label %loop1, label %return
loop1: ; preds = %bb13.loopexit, %entry
%indvar419 = phi i64 [ %indvar.next420, %loop2.exit ], [ 0, %entry ]
%tmp474 = shl i64 %indvar419, 2
%tmp484 = add i64 %tmp474, 4
br label %loop2
loop2: ; preds = %loop1, %loop2.backedge
%indvar414 = phi i64 [ %indvar.next415, %loop2.backedge ], [ 0, %loop1 ]
%tmp473 = mul i64 %indvar414, -4
%tmp485 = add i64 %tmp484, %tmp473
%storemerge4 = getelementptr i8* %a, i64 %tmp485
%0 = icmp ugt i8* %storemerge4, %a
br i1 false, label %loop2.exit, label %loop2.backedge
loop2.backedge: ; preds = %loop2
%indvar.next415 = add i64 %indvar414, 1
br label %loop2
loop2.exit: ; preds = %loop2
%indvar.next420 = add i64 %indvar419, 1
br i1 undef, label %loop1, label %return
return: ; preds = %loop2.exit, %entry
ret void
}