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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185187 91177308-0d34-0410-b5e6-96231b3b80d8

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This commit is contained in:
Preston Briggs 2013-06-28 18:44:48 +00:00
parent dfccd9ee98
commit 26ba495309
2 changed files with 45 additions and 0 deletions
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5
lib/Analysis/DependenceAnalysis.cpp
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@ -2951,6 +2951,11 @@ const SCEV *DependenceAnalysis::addToCoefficient(const SCEV *Expr,
AddRec->getLoop(),
AddRec->getNoWrapFlags());
}
if (SE->isLoopInvariant(AddRec, TargetLoop))
return SE->getAddRecExpr(AddRec,
Value,
TargetLoop,
SCEV::FlagAnyWrap);
return SE->getAddRecExpr(addToCoefficient(AddRec->getStart(),
TargetLoop, Value),
AddRec->getStepRecurrence(*SE),

40
test/Analysis/DependenceAnalysis/Invariant.ll Normal file
View File

@ -0,0 +1,40 @@
; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
; Test for a bug, which caused an assert when an invalid
; SCEVAddRecExpr is created in addToCoefficient.
; CHECK: da analyze - consistent input [S 0]!
; CHECK: da analyze - input [* 0|<]!
; CHECK: da analyze - none!
define float @foo(float %g, [40 x float]* %rr) nounwind {
entry:
br label %for.cond1.preheader
for.cond1.preheader:
%i.04 = phi i32 [ 0, %entry ], [ %add10, %for.inc9 ]
%res.03 = phi float [ 0.000000e+00, %entry ], [ %add.res.1, %for.inc9 ]
br label %for.body3
for.body3:
%j.02 = phi i32 [ 0, %for.cond1.preheader ], [ %add8, %for.body3 ]
%res.11 = phi float [ %res.03, %for.cond1.preheader ], [ %add.res.1, %for.body3 ]
%arrayidx4 = getelementptr inbounds [40 x float]* %rr, i32 %j.02, i32 %j.02
%0 = load float* %arrayidx4, align 4
%arrayidx6 = getelementptr inbounds [40 x float]* %rr, i32 %i.04, i32 %j.02
%1 = load float* %arrayidx6, align 4
%add = fadd float %0, %1
%cmp7 = fcmp ogt float %add, %g
%add.res.1 = select i1 %cmp7, float %add, float %res.11
%add8 = add nsw i32 %j.02, 5
%cmp2 = icmp slt i32 %add8, 40
br i1 %cmp2, label %for.body3, label %for.inc9
for.inc9:
%add10 = add nsw i32 %i.04, 5
%cmp = icmp slt i32 %add10, 40
br i1 %cmp, label %for.cond1.preheader, label %for.end11
for.end11:
ret float %add.res.1
}