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comparison test/CodeGen/SystemZ/fp-sub-01.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
parents
children afa8332a0e37
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-1:000000000000 0:95c75e76d11b
1 ; Test 32-bit floating-point subtraction.
2 ;
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5 declare float @foo()
6
7 ; Check register subtraction.
8 define float @f1(float %f1, float %f2) {
9 ; CHECK-LABEL: f1:
10 ; CHECK: sebr %f0, %f2
11 ; CHECK: br %r14
12 %res = fsub float %f1, %f2
13 ret float %res
14 }
15
16 ; Check the low end of the SEB range.
17 define float @f2(float %f1, float *%ptr) {
18 ; CHECK-LABEL: f2:
19 ; CHECK: seb %f0, 0(%r2)
20 ; CHECK: br %r14
21 %f2 = load float *%ptr
22 %res = fsub float %f1, %f2
23 ret float %res
24 }
25
26 ; Check the high end of the aligned SEB range.
27 define float @f3(float %f1, float *%base) {
28 ; CHECK-LABEL: f3:
29 ; CHECK: seb %f0, 4092(%r2)
30 ; CHECK: br %r14
31 %ptr = getelementptr float *%base, i64 1023
32 %f2 = load float *%ptr
33 %res = fsub float %f1, %f2
34 ret float %res
35 }
36
37 ; Check the next word up, which needs separate address logic.
38 ; Other sequences besides this one would be OK.
39 define float @f4(float %f1, float *%base) {
40 ; CHECK-LABEL: f4:
41 ; CHECK: aghi %r2, 4096
42 ; CHECK: seb %f0, 0(%r2)
43 ; CHECK: br %r14
44 %ptr = getelementptr float *%base, i64 1024
45 %f2 = load float *%ptr
46 %res = fsub float %f1, %f2
47 ret float %res
48 }
49
50 ; Check negative displacements, which also need separate address logic.
51 define float @f5(float %f1, float *%base) {
52 ; CHECK-LABEL: f5:
53 ; CHECK: aghi %r2, -4
54 ; CHECK: seb %f0, 0(%r2)
55 ; CHECK: br %r14
56 %ptr = getelementptr float *%base, i64 -1
57 %f2 = load float *%ptr
58 %res = fsub float %f1, %f2
59 ret float %res
60 }
61
62 ; Check that SEB allows indices.
63 define float @f6(float %f1, float *%base, i64 %index) {
64 ; CHECK-LABEL: f6:
65 ; CHECK: sllg %r1, %r3, 2
66 ; CHECK: seb %f0, 400(%r1,%r2)
67 ; CHECK: br %r14
68 %ptr1 = getelementptr float *%base, i64 %index
69 %ptr2 = getelementptr float *%ptr1, i64 100
70 %f2 = load float *%ptr2
71 %res = fsub float %f1, %f2
72 ret float %res
73 }
74
75 ; Check that subtractions of spilled values can use SEB rather than SEBR.
76 define float @f7(float *%ptr0) {
77 ; CHECK-LABEL: f7:
78 ; CHECK: brasl %r14, foo@PLT
79 ; CHECK: seb %f0, 16{{[04]}}(%r15)
80 ; CHECK: br %r14
81 %ptr1 = getelementptr float *%ptr0, i64 2
82 %ptr2 = getelementptr float *%ptr0, i64 4
83 %ptr3 = getelementptr float *%ptr0, i64 6
84 %ptr4 = getelementptr float *%ptr0, i64 8
85 %ptr5 = getelementptr float *%ptr0, i64 10
86 %ptr6 = getelementptr float *%ptr0, i64 12
87 %ptr7 = getelementptr float *%ptr0, i64 14
88 %ptr8 = getelementptr float *%ptr0, i64 16
89 %ptr9 = getelementptr float *%ptr0, i64 18
90 %ptr10 = getelementptr float *%ptr0, i64 20
91
92 %val0 = load float *%ptr0
93 %val1 = load float *%ptr1
94 %val2 = load float *%ptr2
95 %val3 = load float *%ptr3
96 %val4 = load float *%ptr4
97 %val5 = load float *%ptr5
98 %val6 = load float *%ptr6
99 %val7 = load float *%ptr7
100 %val8 = load float *%ptr8
101 %val9 = load float *%ptr9
102 %val10 = load float *%ptr10
103
104 %ret = call float @foo()
105
106 %sub0 = fsub float %ret, %val0
107 %sub1 = fsub float %sub0, %val1
108 %sub2 = fsub float %sub1, %val2
109 %sub3 = fsub float %sub2, %val3
110 %sub4 = fsub float %sub3, %val4
111 %sub5 = fsub float %sub4, %val5
112 %sub6 = fsub float %sub5, %val6
113 %sub7 = fsub float %sub6, %val7
114 %sub8 = fsub float %sub7, %val8
115 %sub9 = fsub float %sub8, %val9
116 %sub10 = fsub float %sub9, %val10
117
118 ret float %sub10
119 }