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6f9eeb289a
This enables da-delinearize in Dependence Analysis for delinearizing array accesses into multiple dimensions. This can help to increase the power of Dependence analysis on multi-dimensional arrays and prevent having to fall back to the slower and less accurate MIV tests. It adds static checks on the bounds of the arrays to ensure that one dimension doesn't overflow into another, and brings our code in line with our tests. Differential Revision: https://reviews.llvm.org/D45872 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335217 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
1.4 KiB
LLVM
42 lines
1.4 KiB
LLVM
; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
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; Test for a bug, which caused an assert when an invalid
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; SCEVAddRecExpr is created in addToCoefficient.
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; CHECK-LABEL: foo
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; CHECK: da analyze - consistent input [S 0]!
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; CHECK: da analyze - input [* *|<]!
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; CHECK: da analyze - none!
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define float @foo(float %g, [40 x float]* %rr) nounwind {
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entry:
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br label %for.cond1.preheader
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for.cond1.preheader:
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%i.04 = phi i32 [ 0, %entry ], [ %add10, %for.inc9 ]
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%res.03 = phi float [ 0.000000e+00, %entry ], [ %add.res.1, %for.inc9 ]
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br label %for.body3
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for.body3:
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%j.02 = phi i32 [ 0, %for.cond1.preheader ], [ %add8, %for.body3 ]
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%res.11 = phi float [ %res.03, %for.cond1.preheader ], [ %add.res.1, %for.body3 ]
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%arrayidx4 = getelementptr inbounds [40 x float], [40 x float]* %rr, i32 %j.02, i32 %j.02
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%0 = load float, float* %arrayidx4, align 4
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%arrayidx6 = getelementptr inbounds [40 x float], [40 x float]* %rr, i32 %i.04, i32 %j.02
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%1 = load float, float* %arrayidx6, align 4
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%add = fadd float %0, %1
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%cmp7 = fcmp ogt float %add, %g
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%add.res.1 = select i1 %cmp7, float %add, float %res.11
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%add8 = add nsw i32 %j.02, 5
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%cmp2 = icmp slt i32 %add8, 40
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br i1 %cmp2, label %for.body3, label %for.inc9
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for.inc9:
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%add10 = add nsw i32 %i.04, 5
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%cmp = icmp slt i32 %add10, 40
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br i1 %cmp, label %for.cond1.preheader, label %for.end11
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for.end11:
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ret float %add.res.1
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}
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