xref: /llvm-project/polly/test/CodeGen/single_do_loop_ll_max_iterations.ll (revision e1f056f692d869708c1898d9d65a69ac5584a0ed)
1; RUN: opt %loadNPMPolly '-passes=print<polly-ast>' -disable-output < %s | FileCheck %s
2; RUN: opt %loadNPMPolly -passes=polly-codegen < %s
3
4;#define N 20
5;#include "limits.h"
6;long long A[N];
7;
8;int main () {
9;  long long i;
10;
11;  A[0] = 0;
12;
13;  __sync_synchronize();
14;
15;  i = 0;
16;
17;  do {
18;    A[0] = i;
19;    ++i;
20;  } while (i < LLONG_MAX);
21;
22;  __sync_synchronize();
23;
24;  if (A[0] == LLONG_MAX - 1)
25;    return 0;
26;  else
27;    return 1;
28;}
29
30target 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"
31
32@A = common global [20 x i64] zeroinitializer, align 8 ; <ptr> [#uses=1]
33
34define i32 @main() nounwind {
35entry:
36  store i64 0, ptr @A
37  fence seq_cst
38  br label %do.body
39
40do.body:                                          ; preds = %do.cond, %entry
41  %0 = phi i64 [ 0, %entry ], [ %inc, %do.cond ]  ; <i64> [#uses=2]
42  store i64 %0, ptr @A
43  %inc = add nsw i64 %0, 1                        ; <i64> [#uses=2]
44  br label %do.cond
45
46do.cond:                                          ; preds = %do.body
47  %exitcond = icmp ne i64 %inc, 9223372036854775807 ; <i1> [#uses=1]
48  br i1 %exitcond, label %do.body, label %do.end
49
50do.end:                                           ; preds = %do.cond
51  fence seq_cst
52  %tmp3 = load i64, ptr @A ; <i64> [#uses=1]
53  %cmp4 = icmp eq i64 %tmp3, 9223372036854775806  ; <i1> [#uses=1]
54  br i1 %cmp4, label %if.then, label %if.else
55
56if.then:                                          ; preds = %do.end
57  br label %return
58
59if.else:                                          ; preds = %do.end
60  br label %return
61
62return:                                           ; preds = %if.else, %if.then
63  %retval.0 = phi i32 [ 0, %if.then ], [ 1, %if.else ] ; <i32> [#uses=1]
64  ret i32 %retval.0
65}
66
67; CHECK: for (int c0 = 0; c0 <= 9223372036854775806; c0 += 1)
68; CHECK:   Stmt_do_body(c0);
69