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Unit test for PR11950: LSR crash.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153472 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-03-26 21:45:37 +00:00
parent 082120053f
commit 11641d308a
1 changed files with 49 additions and 0 deletions
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test/Transforms/LoopStrengthReduce/2012-03-26-constexpr.ll Normal file
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; RUN: opt < %s -loop-reduce -S
; PR11950: isHighCostExpansion crashes on ConstExpr
;
; The crash happened during IVChain analysis (CollectChains). We don't
; really care how LSR decides to transform this loop, so we don't
; check it. As long as the analysis doesn't crash we're ok.
target datalayout = "e-p:64:64:64-n32:64"
%struct.this_structure_s.0.5 = type { [6144 x [8 x i32]], [6144 x [8 x i32]], [6147 x [4 x i32]], [8 x i32], [2 x i8*], [2 x i8*], [6144 x i8], [6144 x i32], [6144 x i32], [4 x [4 x i8]] }
define internal fastcc void @someFunction(%struct.this_structure_s.0.5* nocapture %scratch, i32 %stage, i32 %cbSize) nounwind {
entry:
%0 = getelementptr inbounds %struct.this_structure_s.0.5* %scratch, i32 0, i32 4, i32 %stage
%1 = load i8** %0, align 4
%2 = getelementptr inbounds %struct.this_structure_s.0.5* %scratch, i32 0, i32 5, i32 %stage
%3 = load i8** %2, align 4
%4 = getelementptr inbounds %struct.this_structure_s.0.5* %scratch, i32 0, i32 2, i32 0, i32 0
%tmp11 = shl i32 %stage, 1
%tmp1325 = or i32 %tmp11, 1
br label %__label_D_1608
__label_D_1608: ; preds = %__label_D_1608, %entry
%i.12 = phi i32 [ 0, %entry ], [ %10, %__label_D_1608 ]
%tmp = shl i32 %i.12, 2
%lvar_g.13 = getelementptr i32* %4, i32 %tmp
%tmp626 = or i32 %tmp, 1
%scevgep = getelementptr i32* %4, i32 %tmp626
%tmp727 = or i32 %tmp, 2
%scevgep8 = getelementptr i32* %4, i32 %tmp727
%tmp928 = or i32 %tmp, 3
%scevgep10 = getelementptr i32* %4, i32 %tmp928
%scevgep12 = getelementptr %struct.this_structure_s.0.5* %scratch, i32 0, i32 9, i32 %tmp11, i32 %i.12
%scevgep14 = getelementptr %struct.this_structure_s.0.5* %scratch, i32 0, i32 9, i32 %tmp1325, i32 %i.12
%5 = load i8* %scevgep12, align 1
%6 = sext i8 %5 to i32
%7 = load i8* %scevgep14, align 1
%8 = sext i8 %7 to i32
store i32 0, i32* %lvar_g.13, align 4
store i32 %8, i32* %scevgep, align 4
store i32 %6, i32* %scevgep8, align 4
%9 = add nsw i32 %8, %6
store i32 %9, i32* %scevgep10, align 4
%10 = add nsw i32 %i.12, 1
%exitcond = icmp eq i32 %10, 3
br i1 %exitcond, label %return, label %__label_D_1608
return: ; preds = %__label_D_1608
ret void
}