forked from OSchip/llvm-project
75 lines
3.0 KiB
LLVM
75 lines
3.0 KiB
LLVM
; RUN: opt %loadPolly -polly-codegen -polly-allow-nonaffine-loops -polly-allow-nonaffine -debug-only=polly-dependence < %s 2>&1 | FileCheck %s
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; REQUIRES: asserts
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; CHECK: MayWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: { Stmt_for_body__TO__for_inc11[i0] -> MemRef_A[o0] : 0 <= o0 <= 699 };
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; CHECK-NEXT: MayWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: { Stmt_for_body__TO__for_inc11[i0] -> MemRef_B[700] };
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; The if condition C[i] is a non-affine condition, which make the nested loop boxed. The memory access for A should be a range A[0...699]. The memory access for B should be simplified to B[700].
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;
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; int A[1000], B[1000], C[1000];
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;
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; void foo(int n, int m, int N) {
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; for (int i = 0; i < 500; i+=1) { /* affine loop */
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; C[i] += i;
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; if (C[i]) { /* non-affine subregion */
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; int j;
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; for (j = 0; j < 700; j+=1) { /* boxed loop */
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; A[j] = 1;
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; }
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; B[j] = 2;
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; }
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; }
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; }
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target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
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@C = common global [1000 x i32] zeroinitializer, align 4
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@A = common global [1000 x i32] zeroinitializer, align 4
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@B = common global [1000 x i32] zeroinitializer, align 4
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; Function Attrs: norecurse nounwind
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define void @foo(i32 %n, i32 %m, i32 %N) #0 {
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entry:
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br label %entry.split
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entry.split: ; preds = %entry
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br label %for.body
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for.cond.cleanup: ; preds = %for.inc11
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ret void
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for.body: ; preds = %for.inc11, %entry.split
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%indvars.iv25 = phi i64 [ 0, %entry.split ], [ %indvars.iv.next26, %for.inc11 ]
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%arrayidx = getelementptr inbounds [1000 x i32], [1000 x i32]* @C, i64 0, i64 %indvars.iv25
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%0 = load i32, i32* %arrayidx, align 4
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%1 = trunc i64 %indvars.iv25 to i32
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%add = add nsw i32 %0, %1
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store i32 %add, i32* %arrayidx, align 4
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%tobool = icmp eq i32 %add, 0
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br i1 %tobool, label %for.inc11, label %for.body5.preheader
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for.body5.preheader: ; preds = %for.body
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br label %for.body5
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for.body5: ; preds = %for.body5.preheader, %for.body5
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body5 ], [ 0, %for.body5.preheader ]
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%arrayidx7 = getelementptr inbounds [1000 x i32], [1000 x i32]* @A, i64 0, i64 %indvars.iv
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store i32 1, i32* %arrayidx7, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv, 699
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br i1 %exitcond, label %for.end, label %for.body5
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for.end: ; preds = %for.body5
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store i32 2, i32* getelementptr inbounds ([1000 x i32], [1000 x i32]* @B, i64 0, i64 700), align 4
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br label %for.inc11
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for.inc11: ; preds = %for.body, %for.end
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%indvars.iv.next26 = add nuw nsw i64 %indvars.iv25, 1
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%exitcond27 = icmp eq i64 %indvars.iv25, 499
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br i1 %exitcond27, label %for.cond.cleanup, label %for.body
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}
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