1 ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
2 ; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 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 define void @foo(ptr addrspace(1) nocapture %d, i32 %n) nounwind {
11 ; CHECK-NEXT: Determining loop execution counts for: @foo
12 ; CHECK-NEXT: Loop %bb: backedge-taken count is (-1 + %n)
13 ; CHECK-NEXT: Loop %bb: constant max backedge-taken count is i32 2147483646
14 ; CHECK-NEXT: Loop %bb: symbolic max backedge-taken count is (-1 + %n)
15 ; CHECK-NEXT: Loop %bb: Trip multiple is 1
18 %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1]
19 br i1 %0, label %bb.nph, label %return
21 bb.nph: ; preds = %entry
24 bb: ; preds = %bb1, %bb.nph
25 %i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2]
26 %p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2]
27 %1 = sext i8 %p.01 to i32 ; <i32> [#uses=1]
28 %2 = sext i32 %i.02 to i64 ; <i64> [#uses=1]
29 %3 = getelementptr i32, ptr addrspace(1) %d, i64 %2 ; <ptr> [#uses=1]
30 store i32 %1, ptr addrspace(1) %3, align 4
31 %4 = add i8 %p.01, 1 ; <i8> [#uses=1]
32 %5 = add i32 %i.02, 1 ; <i32> [#uses=2]
36 %6 = icmp slt i32 %5, %n ; <i1> [#uses=1]
37 br i1 %6, label %bb, label %bb1.return_crit_edge
39 bb1.return_crit_edge: ; preds = %bb1
42 return: ; preds = %bb1.return_crit_edge, %entry
46 define void @test(ptr addrspace(1) %a, i32 %n) nounwind {
49 ; CHECK-NEXT: Determining loop execution counts for: @test
50 ; CHECK-NEXT: Loop %for.body: backedge-taken count is (-1 + (zext i32 %n to i64))<nsw>
51 ; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 2147483646
52 ; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is (-1 + (zext i32 %n to i64))<nsw>
53 ; CHECK-NEXT: Loop %for.body: Trip multiple is 1
56 %cmp1 = icmp sgt i32 %n, 0
57 br i1 %cmp1, label %for.body.lr.ph, label %for.end
59 for.body.lr.ph: ; preds = %entry
60 %tmp = zext i32 %n to i64
63 for.body: ; preds = %for.body, %for.body.lr.ph
64 %indvar = phi i64 [ %indvar.next, %for.body ], [ 0, %for.body.lr.ph ]
65 %arrayidx = getelementptr i8, ptr addrspace(1) %a, i64 %indvar
66 store i8 0, ptr addrspace(1) %arrayidx, align 1
67 %indvar.next = add i64 %indvar, 1
68 %exitcond = icmp ne i64 %indvar.next, %tmp
69 br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge
71 for.cond.for.end_crit_edge: ; preds = %for.body
74 for.end: ; preds = %for.cond.for.end_crit_edge, %entry