forked from OSchip/llvm-project
43 lines
1.4 KiB
LLVM
43 lines
1.4 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -basicaa -loop-interchange -S -debug 2>&1 | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@A = common global [100 x [100 x i32]] zeroinitializer
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@B = common global [100 x i32] zeroinitializer
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;; Loops should not be interchanged in this case as it is not profitable.
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;; for(int i=0;i<100;i++)
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;; for(int j=0;j<100;j++)
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;; A[i][j] = A[i][j]+k;
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; CHECK: Interchanging loops not profitable.
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define void @interchange_03(i32 %k) {
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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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%indvars.iv21 = phi i64 [ 0, %entry ], [ %indvars.iv.next22, %for.inc10 ]
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br label %for.body3
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for.body3:
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%indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body3 ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv21, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx5
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%add = add nsw i32 %0, %k
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store i32 %add, i32* %arrayidx5
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 100
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br i1 %exitcond, label %for.inc10, label %for.body3
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for.inc10:
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%indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1
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%exitcond23 = icmp eq i64 %indvars.iv.next22, 100
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br i1 %exitcond23, label %for.end12, label %for.cond1.preheader
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for.end12:
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ret void
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}
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