1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
; RUN: opt < %s -analyze -scalar-evolution 2>&1 | FileCheck %s
; CHECK: Loop %bb: backedge-taken count is (7 + (-1 * %argc))
define i32 @main(i32 %argc, i8** %argv) nounwind {
entry:
%0 = icmp ugt i32 %argc, 7 ; <i1> [#uses=1]
br i1 %0, label %bb2, label %bb.nph
bb.nph: ; preds = %entry
br label %bb
bb: ; preds = %bb.nph, %bb1
%indvar = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb1 ] ; <i32> [#uses=2]
%argc_addr.04 = add i32 %indvar, %argc ; <i32> [#uses=1]
tail call void (...) @Test() nounwind
%1 = add i32 %argc_addr.04, 1 ; <i32> [#uses=1]
br label %bb1
bb1: ; preds = %bb
%phitmp = icmp ugt i32 %1, 7 ; <i1> [#uses=1]
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
br i1 %phitmp, label %bb1.bb2_crit_edge, label %bb
bb1.bb2_crit_edge: ; preds = %bb1
br label %bb2
bb2: ; preds = %bb1.bb2_crit_edge, %entry
ret i32 0
}
declare void @Test(...)
|
