1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
; When constant propogating terminator instructions, the basic block iterator
; was not updated to refer to the final position of the new terminator. This
; can be bad, f.e. because constproping a terminator can lead to the
; destruction of PHI nodes, which invalidates the iterator!
;
; Fixed by adding new arguments to ConstantFoldTerminator
;
; RUN: opt < %s -constprop
define void @build_tree(i32 %ml) {
; <label>:0
br label %bb2
bb2: ; preds = %bb2, %0
%reg137 = phi i32 [ %reg140, %bb2 ], [ 12, %0 ] ; <i32> [#uses=1]
%reg138 = phi i32 [ %reg139, %bb2 ], [ 0, %0 ] ; <i32> [#uses=1]
%reg139 = add i32 %reg138, 1 ; <i32> [#uses=1]
%reg140 = add i32 %reg137, -1 ; <i32> [#uses=1]
br i1 false, label %bb2, label %bb3
bb3: ; preds = %bb2
ret void
}
|
