blob: 0537722ad9e5bf3abf303f70cf136299ccb8c3a8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
; Test merging of blocks that only have PHI nodes in them
;
; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | not grep 'N:'
;
int %test(bool %a, bool %b) {
br bool %a, label %M, label %O
O:
br bool %b, label %N, label %Q
Q:
br label %N
N:
%Wp = phi int [0, %O], [1, %Q]
; This block should be foldable into M
br label %M
M:
%W = phi int [%Wp, %N], [2, %0]
%R = add int %W, 1
ret int %R
}
|
