1 ; RUN: opt < %s -analyze -enable-new-pm=0 -scalar-evolution | FileCheck %s
2 ; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s
4 ; ScalarEvolution should be able to understand the loop and eliminate the casts.
6 target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-p4:64:64:64-n16:32:64"
8 ; CHECK: {%d,+,4}<%bb>{{ U: [^ ]+ S: [^ ]+}}{{ *}} Exits: (-4 + (4 * (trunc i32 %n to i16)) + %d)
11 define void @foo(i32 addrspace(1)* nocapture %d, i32 %n) nounwind {
14 %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1]
15 br i1 %0, label %bb.nph, label %return
17 bb.nph: ; preds = %entry
20 bb: ; preds = %bb1, %bb.nph
21 %i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2]
22 %p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2]
23 %1 = sext i8 %p.01 to i32 ; <i32> [#uses=1]
24 %2 = sext i32 %i.02 to i64 ; <i64> [#uses=1]
25 %3 = getelementptr i32, i32 addrspace(1)* %d, i64 %2 ; <i32*> [#uses=1]
26 store i32 %1, i32 addrspace(1)* %3, align 4
27 %4 = add i8 %p.01, 1 ; <i8> [#uses=1]
28 %5 = add i32 %i.02, 1 ; <i32> [#uses=2]
32 %6 = icmp slt i32 %5, %n ; <i1> [#uses=1]
33 br i1 %6, label %bb, label %bb1.return_crit_edge
35 bb1.return_crit_edge: ; preds = %bb1
38 return: ; preds = %bb1.return_crit_edge, %entry
42 define void @test(i8 addrspace(1)* %a, i32 %n) nounwind {
45 %cmp1 = icmp sgt i32 %n, 0
46 br i1 %cmp1, label %for.body.lr.ph, label %for.end
48 for.body.lr.ph: ; preds = %entry
49 %tmp = zext i32 %n to i64
52 for.body: ; preds = %for.body, %for.body.lr.ph
53 %indvar = phi i64 [ %indvar.next, %for.body ], [ 0, %for.body.lr.ph ]
54 %arrayidx = getelementptr i8, i8 addrspace(1)* %a, i64 %indvar
55 store i8 0, i8 addrspace(1)* %arrayidx, align 1
56 %indvar.next = add i64 %indvar, 1
57 %exitcond = icmp ne i64 %indvar.next, %tmp
58 br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge
60 for.cond.for.end_crit_edge: ; preds = %for.body
63 for.end: ; preds = %for.cond.for.end_crit_edge, %entry
67 ; CHECK: Determining loop execution counts for: @test
68 ; CHECK-NEXT: backedge-taken count is
69 ; CHECK-NEXT: max backedge-taken count is 2147483646