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
51
|
; RUN: opt < %s -cost-model -analyze -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.8.0"
define void @test_geps() {
; Cost of should be zero. We expect it to be folded into
; the instruction addressing mode.
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i8, i8*
%a0 = getelementptr inbounds i8, i8* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i16, i16*
%a1 = getelementptr inbounds i16, i16* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i32, i32*
%a2 = getelementptr inbounds i32, i32* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i64, i64*
%a3 = getelementptr inbounds i64, i64* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds float, float*
%a4 = getelementptr inbounds float, float* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds double, double*
%a5 = getelementptr inbounds double, double* undef, i32 0
; Vector geps should also have zero cost.
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds <4 x i8>, <4 x i8>*
%a7 = getelementptr inbounds <4 x i8>, <4 x i8>* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds <4 x i16>, <4 x i16>*
%a8 = getelementptr inbounds <4 x i16>, <4 x i16>* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds <4 x i32>, <4 x i32>*
%a9 = getelementptr inbounds <4 x i32>, <4 x i32>* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds <4 x i64>, <4 x i64>*
%a10 = getelementptr inbounds <4 x i64>, <4 x i64>* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds <4 x float>, <4 x float>*
%a11 = getelementptr inbounds <4 x float>, <4 x float>* undef, i32 0
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds <4 x double>, <4 x double>*
%a12 = getelementptr inbounds <4 x double>, <4 x double>* undef, i32 0
; Check that we handle outlandishly large GEPs properly. This is unlikely to
; be a valid pointer, but LLVM still generates GEPs like this sometimes in
; dead code.
;
; This GEP has index INT64_MAX, which is cost 1.
;CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i8, i8*
%giant_gep0 = getelementptr inbounds i8, i8* undef, i64 9223372036854775807
; This GEP index wraps around to -1, which is cost 0.
;CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i8, i8*
%giant_gep1 = getelementptr inbounds i8, i8* undef, i128 295147905179352825855
ret void
}
|
