forked from OSchip/llvm-project
82 lines
3.0 KiB
LLVM
82 lines
3.0 KiB
LLVM
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
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; RUN: opt %loadPolly -polly-function-scops -analyze < %s | FileCheck %s
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; void foo(float A[][20][30], long n, long m, long p) {
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; for (long i = 0; i < n; i++)
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; for (long j = 0; j < m; j++)
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; for (long k = 0; k < p; k++)
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; A[i][j][k] = i + j + k;
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; }
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; For the above code we want to assume that all memory accesses are within the
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; bounds of the array A. In C (and LLVM-IR) this is not required, such that out
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; of bounds accesses are valid. However, as such accesses are uncommon, cause
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; complicated dependence pattern and as a result make dependence analysis more
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; costly and may prevent or hinder useful program transformations, we assume
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; absence of out-of-bound accesses. To do so we derive the set of parameter
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; values for which our assumption holds.
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; CHECK: Assumed Context
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; CHECK-NEXT: [n, m, p] -> { :
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; CHECK-DAG: p <= 30
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; CHECK-DAG: and
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; CHECK-DAG: m <= 20
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; CHECK: }
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define void @foo([20 x [30 x float]]* %A, i64 %n, i64 %m, i64 %p) {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc13, %entry
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%i.0 = phi i64 [ 0, %entry ], [ %inc14, %for.inc13 ]
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%cmp = icmp slt i64 %i.0, %n
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br i1 %cmp, label %for.body, label %for.end15
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for.body: ; preds = %for.cond
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br label %for.cond1
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for.cond1: ; preds = %for.inc10, %for.body
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%j.0 = phi i64 [ 0, %for.body ], [ %inc11, %for.inc10 ]
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%cmp2 = icmp slt i64 %j.0, %m
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br i1 %cmp2, label %for.body3, label %for.end12
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for.body3: ; preds = %for.cond1
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br label %for.cond4
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for.cond4: ; preds = %for.inc, %for.body3
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%k.0 = phi i64 [ 0, %for.body3 ], [ %inc, %for.inc ]
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%cmp5 = icmp slt i64 %k.0, %p
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br i1 %cmp5, label %for.body6, label %for.end
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for.body6: ; preds = %for.cond4
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%add = add nsw i64 %i.0, %j.0
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%add7 = add nsw i64 %add, %k.0
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%conv = sitofp i64 %add7 to float
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%arrayidx9 = getelementptr inbounds [20 x [30 x float]], [20 x [30 x float]]* %A, i64 %i.0, i64 %j.0, i64 %k.0
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store float %conv, float* %arrayidx9, align 4
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br label %for.inc
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for.inc: ; preds = %for.body6
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%inc = add nsw i64 %k.0, 1
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br label %for.cond4
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for.end: ; preds = %for.cond4
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br label %for.inc10
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for.inc10: ; preds = %for.end
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%inc11 = add nsw i64 %j.0, 1
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br label %for.cond1
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for.end12: ; preds = %for.cond1
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br label %for.inc13
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for.inc13: ; preds = %for.end12
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%inc14 = add nsw i64 %i.0, 1
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br label %for.cond
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for.end15: ; preds = %for.cond
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ret void
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}
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