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- ; RUN: opt < %s -analyze -scalar-evolution -scalar-evolution-max-iterations=0 | FileCheck %s
- ; PR1101
- target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
- target triple = "x86_64-unknown-linux-gnu"
- @A = weak global [1000 x i32] zeroinitializer, align 32
- ; CHECK: Printing analysis 'Scalar Evolution Analysis' for function 'test1':
- ; CHECK: backedge-taken count is 10000
- define void @test1(i32 %N) {
- entry:
- br label %bb3
- bb: ; preds = %bb3
- %tmp = getelementptr [1000 x i32], [1000 x i32]* @A, i32 0, i32 %i.0 ; <i32*> [#uses=1]
- store i32 123, i32* %tmp
- %tmp2 = add i32 %i.0, 1 ; <i32> [#uses=1]
- br label %bb3
- bb3: ; preds = %bb, %entry
- %i.0 = phi i32 [ 0, %entry ], [ %tmp2, %bb ] ; <i32> [#uses=3]
- %tmp3 = icmp sle i32 %i.0, 9999 ; <i1> [#uses=1]
- br i1 %tmp3, label %bb, label %bb5
- bb5: ; preds = %bb3
- br label %return
- return: ; preds = %bb5
- ret void
- }
- ; PR22795
- ; CHECK: Printing analysis 'Scalar Evolution Analysis' for function 'test2':
- ; CHECK: %iv = phi i32 [ -1, %entry ], [ %next.1, %for.inc.1 ]
- ; CHECK-NEXT: --> {-1,+,2}<%preheader> U: full-set S: full-set Exits: 13
- define i32 @test2() {
- entry:
- %bins = alloca [16 x i64], align 16
- %0 = bitcast [16 x i64]* %bins to i8*
- call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 128, i32 16, i1 false)
- br label %preheader
- preheader: ; preds = %for.inc.1, %entry
- %v11 = phi i64 [ 0, %entry ], [ %next12.1, %for.inc.1 ]
- %iv = phi i32 [ -1, %entry ], [ %next.1, %for.inc.1 ]
- %cmp = icmp sgt i64 %v11, 0
- br i1 %cmp, label %for.body, label %for.inc
- for.body: ; preds = %preheader
- %zext = zext i32 %iv to i64
- %arrayidx = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 %v11
- %loaded = load i64, i64* %arrayidx, align 8
- %add = add i64 %loaded, 1
- %add2 = add i64 %add, %zext
- store i64 %add2, i64* %arrayidx, align 8
- br label %for.inc
- for.inc: ; preds = %for.body, %preheader
- %next12 = add nuw nsw i64 %v11, 1
- %next = add nsw i32 %iv, 1
- br i1 true, label %for.body.1, label %for.inc.1
- end: ; preds = %for.inc.1
- %arrayidx8 = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 2
- %load = load i64, i64* %arrayidx8, align 16
- %shr4 = lshr i64 %load, 32
- %conv = trunc i64 %shr4 to i32
- ret i32 %conv
- for.body.1: ; preds = %for.inc
- %zext.1 = zext i32 %next to i64
- %arrayidx.1 = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 %next12
- %loaded.1 = load i64, i64* %arrayidx.1, align 8
- %add.1 = add i64 %loaded.1, 1
- %add2.1 = add i64 %add.1, %zext.1
- store i64 %add2.1, i64* %arrayidx.1, align 8
- br label %for.inc.1
- for.inc.1: ; preds = %for.body.1, %for.inc
- %next12.1 = add nuw nsw i64 %next12, 1
- %next.1 = add nuw nsw i32 %next, 1
- %exitcond.1 = icmp eq i64 %next12.1, 16
- br i1 %exitcond.1, label %end, label %preheader
- }
- ; Function Attrs: nounwind
- declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #0
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