source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/ScalarEvolution/trip-count3.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 3.4 KB
Line 
1; RUN: opt < %s -scalar-evolution -analyze | FileCheck %s
2
3; ScalarEvolution can't compute a trip count because it doesn't know if
4; dividing by the stride will have a remainder. This could theoretically
5; be teaching it how to use a more elaborate trip count computation.
6
7; CHECK: Loop %bb3.i: backedge-taken count is ((64 + (-64 smax (-1 + (-1 * %0))) + %0) /u 64)
8; CHECK: Loop %bb3.i: max backedge-taken count is 33554431
9
10%struct.FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct.FILE*, i32, i32, i64, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i8*, i8*, i64, i32, [20 x i8] }
11%struct.SHA_INFO = type { [5 x i32], i32, i32, [16 x i32] }
12%struct._IO_marker = type { %struct._IO_marker*, %struct.FILE*, i32 }
13
14@_2E_str = external constant [26 x i8]
15@stdin = external global %struct.FILE*
16@_2E_str1 = external constant [3 x i8]
17@_2E_str12 = external constant [30 x i8]
18
19declare void @sha_init(%struct.SHA_INFO* nocapture) nounwind
20
21declare fastcc void @sha_transform(%struct.SHA_INFO* nocapture) nounwind
22
23declare void @sha_print(%struct.SHA_INFO* nocapture) nounwind
24
25declare i32 @printf(i8* nocapture, ...) nounwind
26
27declare void @sha_final(%struct.SHA_INFO* nocapture) nounwind
28
29declare void @sha_update(%struct.SHA_INFO* nocapture, i8* nocapture, i32) nounwind
30
31declare i64 @fread(i8* noalias nocapture, i64, i64, %struct.FILE* noalias nocapture) nounwind
32
33declare i32 @main(i32, i8** nocapture) nounwind
34
35declare noalias %struct.FILE* @fopen(i8* noalias nocapture, i8* noalias nocapture) nounwind
36
37declare i32 @fclose(%struct.FILE* nocapture) nounwind
38
39declare void @sha_stream(%struct.SHA_INFO* nocapture, %struct.FILE* nocapture) nounwind
40
41define void @sha_stream_bb3_2E_i(%struct.SHA_INFO* %sha_info, i8* %data1, i32, i8** %buffer_addr.0.i.out, i32* %count_addr.0.i.out) nounwind {
42newFuncRoot:
43  br label %bb3.i
44
45sha_update.exit.exitStub:                         ; preds = %bb3.i
46  store i8* %buffer_addr.0.i, i8** %buffer_addr.0.i.out
47  store i32 %count_addr.0.i, i32* %count_addr.0.i.out
48  ret void
49
50bb2.i:                                            ; preds = %bb3.i
51  %1 = getelementptr %struct.SHA_INFO, %struct.SHA_INFO* %sha_info, i64 0, i32 3
52  %2 = bitcast [16 x i32]* %1 to i8*
53  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %buffer_addr.0.i, i64 64, i32 1, i1 false)
54  %3 = getelementptr %struct.SHA_INFO, %struct.SHA_INFO* %sha_info, i64 0, i32 3, i64 0
55  %4 = bitcast i32* %3 to i8*
56  br label %codeRepl
57
58codeRepl:                                         ; preds = %bb2.i
59  call void @sha_stream_bb3_2E_i_bb1_2E_i_2E_i(i8* %4)
60  br label %byte_reverse.exit.i
61
62byte_reverse.exit.i:                              ; preds = %codeRepl
63  call fastcc void @sha_transform(%struct.SHA_INFO* %sha_info) nounwind
64  %5 = getelementptr i8, i8* %buffer_addr.0.i, i64 64
65  %6 = add i32 %count_addr.0.i, -64
66  br label %bb3.i
67
68bb3.i:                                            ; preds = %byte_reverse.exit.i, %newFuncRoot
69  %buffer_addr.0.i = phi i8* [ %data1, %newFuncRoot ], [ %5, %byte_reverse.exit.i ]
70  %count_addr.0.i = phi i32 [ %0, %newFuncRoot ], [ %6, %byte_reverse.exit.i ]
71  %7 = icmp sgt i32 %count_addr.0.i, 63
72  br i1 %7, label %bb2.i, label %sha_update.exit.exitStub
73}
74
75declare void @sha_stream_bb3_2E_i_bb1_2E_i_2E_i(i8*) nounwind
76
77declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
78
79declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
80
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