derek.holloway
7502bf64a4
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64 lines
1.9 KiB
LLVM
64 lines
1.9 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -passes=loop-interchange -pass-remarks-missed='loop-interchange' -pass-remarks-output=%t -S \
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; RUN: -verify-dom-info -verify-loop-info 2>&1
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; RUN: FileCheck --input-file=%t %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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@A = common global [100 x [100 x i32]] zeroinitializer
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declare void @foo(i64 %a)
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declare void @bar(i64 %a) readnone
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;;--------------------------------------Test case 01------------------------------------
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;; Not safe to interchange, because the called function `foo` is not marked as
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;; readnone, so it could introduce dependences.
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;;
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;; for(int i=0;i<100;i++) {
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;; for(int j=1;j<100;j++) {
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;; foo(i);
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;; A[j][i] = A[j][i]+k;
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;; }
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;; }
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; CHECK: --- !Missed
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; CHECK-NEXT: Pass: loop-interchange
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; CHECK-NEXT: Name: UnsafeInst
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; CHECK-NEXT: Function: interchange_01
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; CHECK-NEXT: Args:
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; CHECK-NEXT: - String: Cannot interchange loops due to instruction that is potentially unsafe to interchange.
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define void @interchange_01(i32 %k) {
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entry:
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br label %for1.header
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for1.header:
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%indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for1.inc10 ]
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br label %for2
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for2:
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%indvars.iv = phi i64 [ %indvars.iv.next, %for2 ], [ 1, %for1.header ]
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call void @foo(i64 %indvars.iv23)
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%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], ptr @A, i64 0, i64 %indvars.iv, i64 %indvars.iv23
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%lv = load i32, ptr %arrayidx5
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%add = add nsw i32 %lv, %k
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store i32 %add, ptr %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, 99
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br i1 %exitcond, label %for2.loopexit , label %for2
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for2.loopexit:
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br label %for1.inc10
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for1.inc10:
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%indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
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%exitcond26 = icmp eq i64 %indvars.iv23, 99
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br i1 %exitcond26, label %for1.loopexit, label %for1.header
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for1.loopexit:
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br label %exit
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exit:
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ret void
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}
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