derek.holloway
7502bf64a4
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60 lines
2.4 KiB
LLVM
60 lines
2.4 KiB
LLVM
;; This test was created to ensure that the LoopFlatten pass can
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;; operate on loops that are not in simplified form before applying the pass.
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; RUN: opt < %s -S -passes='loop(loop-flatten),simplifycfg,verify' -verify-loop-info -verify-dom-info -verify-scev | FileCheck %s
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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define void @test(i64 %N, ptr %A, i64 %val) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i64 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_COND_PREHEADER_PREHEADER:%.*]]
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; CHECK: for.cond.preheader.preheader:
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; CHECK-NEXT: [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[N]], [[N]]
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; CHECK-NEXT: br label [[FOR_COND_PREHEADER:%.*]]
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; CHECK: for.cond.preheader:
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; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[INC6:%.*]], [[FOR_COND_PREHEADER]] ], [ 0, [[FOR_COND_PREHEADER_PREHEADER]] ]
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; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[I]], [[N]]
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; CHECK-NEXT: [[ADD:%.*]] = add i64 0, [[MUL]]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i64, ptr [[A:%.*]], i64 [[I]]
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; CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[ADD4:%.*]] = add nsw i64 [[TMP0]], [[VAL:%.*]]
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; CHECK-NEXT: store i64 [[ADD4]], ptr [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i64 0, 1
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i64 [[INC]], [[N]]
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; CHECK-NEXT: [[INC6]] = add nuw nsw i64 [[I]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC6]], [[FLATTEN_TRIPCOUNT]]
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_COND_PREHEADER]], label [[FOR_END]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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entry:
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%cmp.not = icmp eq i64 %N, 0
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br i1 %cmp.not, label %for.end, label %for.cond.preheader
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for.cond.preheader:
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%i= phi i64 [ %inc6, %for.cond.for.inc_crit_edge ], [ 0, %entry ]
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%mul = mul i64 %i, %N
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br label %for.body
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for.body:
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%j = phi i64 [ 0, %for.cond.preheader ], [ %inc, %for.body ]
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%add = add i64 %j, %mul
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%arrayidx = getelementptr inbounds i64, ptr %A, i64 %add
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%0 = load i64, ptr %arrayidx, align 4
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%add4 = add nsw i64 %0, %val
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store i64 %add4, ptr %arrayidx, align 4
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%inc = add nuw nsw i64 %j, 1
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%cmp2 = icmp ult i64 %inc, %N
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br i1 %cmp2, label %for.body, label %for.cond.for.inc_crit_edge
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for.cond.for.inc_crit_edge:
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%inc6 = add nuw nsw i64 %i, 1
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%cmp = icmp ult i64 %inc6, %N
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br i1 %cmp, label %for.cond.preheader, label %for.end
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for.end:
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ret void
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}
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