forked from OSchip/llvm-project
77 lines
3.0 KiB
LLVM
77 lines
3.0 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -basicaa -loop-interchange -verify-dom-info -verify-loop-info \
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; RUN: -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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@C = common global [100 x [100 x i32]] zeroinitializer
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@D = common global [100 x [100 x [100 x i32]]] zeroinitializer
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;; Test that a flow dependency in outer loop doesn't prevent interchange in
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;; loops i and j.
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;;
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;; for (int k = 0; k < 100; ++k) {
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;; T[k] = fn1();
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;; for (int i = 0; i < 1000; ++i)
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;; for(int j = 1; j < 1000; ++j)
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;; Arr[j][i] = Arr[j][i]+k;
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;; fn2(T[k]);
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;; }
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; CHECK: Processing Inner Loop Id = 2 and OuterLoopId = 1
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; CHECK: Loops interchanged.
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; CHECK: Processing Inner Loop Id = 1 and OuterLoopId = 0
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; CHECK: Not interchanging loops. Cannot prove legality.
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@T = internal global [100 x double] zeroinitializer, align 4
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@Arr = internal global [1000 x [1000 x i32]] zeroinitializer, align 4
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define void @interchange_09(i32 %k) {
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.cond.cleanup4
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ret void
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for.body: ; preds = %for.cond.cleanup4, %entry
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%indvars.iv45 = phi i64 [ 0, %entry ], [ %indvars.iv.next46, %for.cond.cleanup4 ]
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%call = call double @fn1()
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%arrayidx = getelementptr inbounds [100 x double], [100 x double]* @T, i64 0, i64 %indvars.iv45
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store double %call, double* %arrayidx, align 8
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br label %for.cond6.preheader
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for.cond6.preheader: ; preds = %for.cond.cleanup8, %for.body
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%indvars.iv42 = phi i64 [ 0, %for.body ], [ %indvars.iv.next43, %for.cond.cleanup8 ]
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br label %for.body9
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for.cond.cleanup4: ; preds = %for.cond.cleanup8
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%tmp = load double, double* %arrayidx, align 8
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call void @fn2(double %tmp)
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%indvars.iv.next46 = add nuw nsw i64 %indvars.iv45, 1
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%exitcond47 = icmp ne i64 %indvars.iv.next46, 100
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br i1 %exitcond47, label %for.body, label %for.cond.cleanup
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for.cond.cleanup8: ; preds = %for.body9
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%indvars.iv.next43 = add nuw nsw i64 %indvars.iv42, 1
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%exitcond44 = icmp ne i64 %indvars.iv.next43, 1000
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br i1 %exitcond44, label %for.cond6.preheader, label %for.cond.cleanup4
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for.body9: ; preds = %for.body9, %for.cond6.preheader
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%indvars.iv = phi i64 [ 1, %for.cond6.preheader ], [ %indvars.iv.next, %for.body9 ]
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%arrayidx13 = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* @Arr, i64 0, i64 %indvars.iv, i64 %indvars.iv42
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%tmp1 = load i32, i32* %arrayidx13, align 4
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%tmp2 = trunc i64 %indvars.iv45 to i32
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%add = add nsw i32 %tmp1, %tmp2
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store i32 %add, i32* %arrayidx13, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp ne i64 %indvars.iv.next, 1000
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br i1 %exitcond, label %for.body9, label %for.cond.cleanup8
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}
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declare double @fn1() readnone
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declare void @fn2(double) readnone
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