1 ; RUN: opt < %s -indvars -disable-iv-rewrite -S | FileCheck %s
3 ; Make sure that indvars isn't inserting canonical IVs.
4 ; This is kinda hard to do until linear function test replacement is removed.
6 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
8 define i32 @sum(i32* %arr, i32 %n) nounwind {
10 %precond = icmp slt i32 0, %n
11 br i1 %precond, label %ph, label %return
18 ; We should only have 2 IVs.
23 ; sext should be eliminated while preserving gep inboundsness.
25 ; CHECK: getelementptr inbounds
27 %i.02 = phi i32 [ 0, %ph ], [ %iinc, %loop ]
28 %s.01 = phi i32 [ 0, %ph ], [ %sinc, %loop ]
29 %ofs = sext i32 %i.02 to i64
30 %adr = getelementptr inbounds i32* %arr, i64 %ofs
32 %sinc = add nsw i32 %s.01, %val
33 %iinc = add nsw i32 %i.02, 1
34 %cond = icmp slt i32 %iinc, %n
35 br i1 %cond, label %loop, label %exit
38 %s.lcssa = phi i32 [ %sinc, %loop ]
42 %s.0.lcssa = phi i32 [ %s.lcssa, %exit ], [ 0, %entry ]
46 define i64 @suml(i32* %arr, i32 %n) nounwind {
48 %precond = icmp slt i32 0, %n
49 br i1 %precond, label %ph, label %return
56 ; We should only have 2 IVs.
61 ; %ofs sext should be eliminated while preserving gep inboundsness.
63 ; CHECK: getelementptr inbounds
64 ; %vall sext should obviously not be eliminated
67 %i.02 = phi i32 [ 0, %ph ], [ %iinc, %loop ]
68 %s.01 = phi i64 [ 0, %ph ], [ %sinc, %loop ]
69 %ofs = sext i32 %i.02 to i64
70 %adr = getelementptr inbounds i32* %arr, i64 %ofs
72 %vall = sext i32 %val to i64
73 %sinc = add nsw i64 %s.01, %vall
74 %iinc = add nsw i32 %i.02, 1
75 %cond = icmp slt i32 %iinc, %n
76 br i1 %cond, label %loop, label %exit
79 %s.lcssa = phi i64 [ %sinc, %loop ]
83 %s.0.lcssa = phi i64 [ %s.lcssa, %exit ], [ 0, %entry ]
87 define void @outofbounds(i32* %first, i32* %last, i32 %idx) nounwind {
88 %precond = icmp ne i32* %first, %last
89 br i1 %precond, label %ph, label %return
92 ; It's not indvars' job to perform LICM on %ofs
99 ; Preserve exactly one pointer type IV.
103 ; Don't create any extra adds.
106 ; Preserve gep inboundsness, and don't factor it.
107 ; CHECK: getelementptr inbounds i32* %ptriv, i32 1
110 %ptriv = phi i32* [ %first, %ph ], [ %ptrpost, %loop ]
111 %ofs = sext i32 %idx to i64
112 %adr = getelementptr inbounds i32* %ptriv, i64 %ofs
113 store i32 3, i32* %adr
114 %ptrpost = getelementptr inbounds i32* %ptriv, i32 1
115 %cond = icmp ne i32* %ptrpost, %last
116 br i1 %cond, label %loop, label %exit