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cb2262b8e2
LoopInterchange relies on LoopInfo being up-to-date, so we should preserve it after interchanging. This patch updates restructureLoops to move the BBs of the interchanged loops to the right place. Reviewers: davide, efriedma, karthikthecool, mcrosier Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D45278 llvm-svn: 329264
45 lines
1.6 KiB
LLVM
45 lines
1.6 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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;; Loops should not be interchanged in this case as it is not legal due to dependency.
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;; for(int j=0;j<99;j++)
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;; for(int i=0;i<99;i++)
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;; A[j][i+1] = A[j+1][i]+k;
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; CHECK: Not interchanging loops. Cannot prove legality.
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define void @interchange_04(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.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for.inc12 ]
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%indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
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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.iv.next24, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx5
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%add6 = add nsw i32 %0, %k
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%arrayidx11 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv23, i64 %indvars.iv.next
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store i32 %add6, i32* %arrayidx11
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%exitcond = icmp eq i64 %indvars.iv.next, 99
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br i1 %exitcond, label %for.inc12, label %for.body3
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for.inc12:
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%exitcond25 = icmp eq i64 %indvars.iv.next24, 99
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br i1 %exitcond25, label %for.end14, label %for.cond1.preheader
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for.end14:
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ret void
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}
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