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
33
34
35
36
37
38
39
40
41
|
; RUN: llvm-upgrade < %s | llvm-as | opt -indvars -instcombine | llvm-dis | grep 'store i32 0'
; Test that -indvars can reduce variable stride IVs. If it can reduce variable
; stride iv's, it will make %iv. and %m.0.0 isomorphic to each other without
; cycles, allowing the tmp.21 subtraction to be eliminated.
void %vnum_test8(int* %data) {
entry:
%tmp.1 = getelementptr int* %data, int 3 ; <int*> [#uses=1]
%tmp.2 = load int* %tmp.1 ; <int> [#uses=2]
%tmp.4 = getelementptr int* %data, int 4 ; <int*> [#uses=1]
%tmp.5 = load int* %tmp.4 ; <int> [#uses=2]
%tmp.8 = getelementptr int* %data, int 2 ; <int*> [#uses=1]
%tmp.9 = load int* %tmp.8 ; <int> [#uses=3]
%tmp.125 = setgt int %tmp.2, 0 ; <bool> [#uses=1]
br bool %tmp.125, label %no_exit.preheader, label %return
no_exit.preheader: ; preds = %entry
%tmp.16 = getelementptr int* %data, int %tmp.9 ; <int*> [#uses=1]
br label %no_exit
no_exit: ; preds = %no_exit, %no_exit.preheader
%iv.ui = phi uint [ 0, %no_exit.preheader ], [ %iv..inc.ui, %no_exit ] ; <uint> [#uses=1]
%iv. = phi int [ %tmp.5, %no_exit.preheader ], [ %iv..inc, %no_exit ] ; <int> [#uses=2]
%m.0.0 = phi int [ %tmp.5, %no_exit.preheader ], [ %tmp.24, %no_exit ] ; <int> [#uses=2]
store int 2, int* %tmp.16
%tmp.21 = sub int %m.0.0, %iv. ; <int> [#uses=1]
store int %tmp.21, int* %data
%tmp.24 = add int %m.0.0, %tmp.9 ; <int> [#uses=1]
%iv..inc = add int %tmp.9, %iv. ; <int> [#uses=1]
%iv..inc.ui = add uint %iv.ui, 1 ; <uint> [#uses=2]
%iv..inc1 = cast uint %iv..inc.ui to int ; <int> [#uses=1]
%tmp.12 = setlt int %iv..inc1, %tmp.2 ; <bool> [#uses=1]
br bool %tmp.12, label %no_exit, label %return.loopexit
return.loopexit: ; preds = %no_exit
br label %return
return: ; preds = %return.loopexit, %entry
ret void
}
|
