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
42
43
44
45
46
47
48
49
50
|
; The %A getelementptr instruction should be eliminated here
; RUN: if as < %s | opt -instcombine -die | dis | grep getelementptr | grep '%A '
; RUN: then exit 1
; RUN: else exit 0
; RUN: fi
%Global = constant [10 x sbyte] c"helloworld"
implementation
int *%foo1(int* %I) { ; Test noop elimination
%A = getelementptr int* %I, long 0
ret int * %A
}
int* %foo2(int* %I) { ; Test noop elimination
%A = getelementptr int* %I
ret int* %A
}
int* %foo3(int * %I) { ; Test that two array indexing geps fold
%A = getelementptr int* %I, long 17
%B = getelementptr int* %A, long 4
ret int* %B
}
int* %foo4({int} *%I) { ; Test that two getelementptr insts fold
%A = getelementptr {int}* %I, long 1
%B = getelementptr {int}* %A, long 0, ubyte 0
ret int* %B
}
sbyte * %foo5() {
; This should be turned into a constexpr instead of being an instruction
%A = getelementptr [10 x sbyte]* %Global, long 0, long 4
ret sbyte* %A
}
int* %foo6() {
%M = malloc [4 x int]
%A = getelementptr [4 x int]* %M, long 0, long 0
%B = getelementptr int* %A, long 2
ret int* %B
}
int* %foo7(int* %I, long %C, long %D) {
%A = getelementptr int* %I, long %C
%B = getelementptr int* %A, long %D
ret int* %B
}
|
