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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
|
; Test the handling of base + index + 12-bit displacement addresses for
; large frames, in cases where no 20-bit form exists. The tests here
; assume z10 register pressure, without the high words being available.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | \
; RUN: FileCheck -check-prefix=CHECK-NOFP %s
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 -disable-fp-elim | \
; RUN: FileCheck -check-prefix=CHECK-FP %s
declare void @foo(float *%ptr1, float *%ptr2)
; This file tests what happens when a displacement is converted from
; being relative to the start of a frame object to being relative to
; the frame itself. In some cases the test is only possible if two
; objects are allocated.
;
; Rather than rely on a particular order for those objects, the tests
; instead allocate two objects of the same size and apply the test to
; both of them. For consistency, all tests follow this model, even if
; one object would actually be enough.
; First check the highest in-range offset after conversion, which is 4092
; for word-addressing instructions like LDEB.
;
; The last in-range doubleword offset is 4088. Since the frame has two
; emergency spill slots at 160(%r15), the amount that we need to allocate
; in order to put another object at offset 4088 is (4088 - 176) / 4 = 978
; words.
define void @f1(double *%dst) {
; CHECK-NOFP-LABEL: f1:
; CHECK-NOFP: ldeb {{%f[0-7]}}, 4092(%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f1:
; CHECK-FP: ldeb {{%f[0-7]}}, 4092(%r11)
; CHECK-FP: br %r14
%region1 = alloca [978 x float], align 8
%region2 = alloca [978 x float], align 8
%start1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 1
%ptr2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 1
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; Test the first out-of-range offset.
define void @f2(double *%dst) {
; CHECK-NOFP-LABEL: f2:
; CHECK-NOFP: lghi %r1, 4096
; CHECK-NOFP: ldeb {{%f[0-7]}}, 0(%r1,%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f2:
; CHECK-FP: lghi %r1, 4096
; CHECK-FP: ldeb {{%f[0-7]}}, 0(%r1,%r11)
; CHECK-FP: br %r14
%region1 = alloca [978 x float], align 8
%region2 = alloca [978 x float], align 8
%start1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 2
%ptr2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 2
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; Test the next offset after that.
define void @f3(double *%dst) {
; CHECK-NOFP-LABEL: f3:
; CHECK-NOFP: lghi %r1, 4096
; CHECK-NOFP: ldeb {{%f[0-7]}}, 4(%r1,%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f3:
; CHECK-FP: lghi %r1, 4096
; CHECK-FP: ldeb {{%f[0-7]}}, 4(%r1,%r11)
; CHECK-FP: br %r14
%region1 = alloca [978 x float], align 8
%region2 = alloca [978 x float], align 8
%start1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 3
%ptr2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 3
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; Add 4096 bytes (1024 words) to the size of each object and repeat.
define void @f4(double *%dst) {
; CHECK-NOFP-LABEL: f4:
; CHECK-NOFP: lghi %r1, 4096
; CHECK-NOFP: ldeb {{%f[0-7]}}, 4092(%r1,%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f4:
; CHECK-FP: lghi %r1, 4096
; CHECK-FP: ldeb {{%f[0-7]}}, 4092(%r1,%r11)
; CHECK-FP: br %r14
%region1 = alloca [2002 x float], align 8
%region2 = alloca [2002 x float], align 8
%start1 = getelementptr inbounds [2002 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [2002 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [2002 x float]* %region1, i64 0, i64 1
%ptr2 = getelementptr inbounds [2002 x float]* %region2, i64 0, i64 1
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; ...as above.
define void @f5(double *%dst) {
; CHECK-NOFP-LABEL: f5:
; CHECK-NOFP: lghi %r1, 8192
; CHECK-NOFP: ldeb {{%f[0-7]}}, 0(%r1,%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f5:
; CHECK-FP: lghi %r1, 8192
; CHECK-FP: ldeb {{%f[0-7]}}, 0(%r1,%r11)
; CHECK-FP: br %r14
%region1 = alloca [2002 x float], align 8
%region2 = alloca [2002 x float], align 8
%start1 = getelementptr inbounds [2002 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [2002 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [2002 x float]* %region1, i64 0, i64 2
%ptr2 = getelementptr inbounds [2002 x float]* %region2, i64 0, i64 2
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; ...as above.
define void @f6(double *%dst) {
; CHECK-NOFP-LABEL: f6:
; CHECK-NOFP: lghi %r1, 8192
; CHECK-NOFP: ldeb {{%f[0-7]}}, 4(%r1,%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f6:
; CHECK-FP: lghi %r1, 8192
; CHECK-FP: ldeb {{%f[0-7]}}, 4(%r1,%r11)
; CHECK-FP: br %r14
%region1 = alloca [2002 x float], align 8
%region2 = alloca [2002 x float], align 8
%start1 = getelementptr inbounds [2002 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [2002 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [2002 x float]* %region1, i64 0, i64 3
%ptr2 = getelementptr inbounds [2002 x float]* %region2, i64 0, i64 3
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; Now try an offset of 4092 from the start of the object, with the object
; being at offset 8192. This time we need objects of (8192 - 168) / 4 = 2004
; words.
define void @f7(double *%dst) {
; CHECK-NOFP-LABEL: f7:
; CHECK-NOFP: lghi %r1, 8192
; CHECK-NOFP: ldeb {{%f[0-7]}}, 4092(%r1,%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f7:
; CHECK-FP: lghi %r1, 8192
; CHECK-FP: ldeb {{%f[0-7]}}, 4092(%r1,%r11)
; CHECK-FP: br %r14
%region1 = alloca [2004 x float], align 8
%region2 = alloca [2004 x float], align 8
%start1 = getelementptr inbounds [2004 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [2004 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [2004 x float]* %region1, i64 0, i64 1023
%ptr2 = getelementptr inbounds [2004 x float]* %region2, i64 0, i64 1023
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; Keep the object-relative offset the same but bump the size of the
; objects by one doubleword.
define void @f8(double *%dst) {
; CHECK-NOFP-LABEL: f8:
; CHECK-NOFP: lghi %r1, 12288
; CHECK-NOFP: ldeb {{%f[0-7]}}, 4(%r1,%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f8:
; CHECK-FP: lghi %r1, 12288
; CHECK-FP: ldeb {{%f[0-7]}}, 4(%r1,%r11)
; CHECK-FP: br %r14
%region1 = alloca [2006 x float], align 8
%region2 = alloca [2006 x float], align 8
%start1 = getelementptr inbounds [2006 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [2006 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [2006 x float]* %region1, i64 0, i64 1023
%ptr2 = getelementptr inbounds [2006 x float]* %region2, i64 0, i64 1023
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; Check a case where the original displacement is out of range. The backend
; should force an LAY from the outset. We don't yet do any kind of anchor
; optimization, so there should be no offset on the LDEB itself.
define void @f9(double *%dst) {
; CHECK-NOFP-LABEL: f9:
; CHECK-NOFP: lay %r1, 12296(%r15)
; CHECK-NOFP: ldeb {{%f[0-7]}}, 0(%r1)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f9:
; CHECK-FP: lay %r1, 12296(%r11)
; CHECK-FP: ldeb {{%f[0-7]}}, 0(%r1)
; CHECK-FP: br %r14
%region1 = alloca [2006 x float], align 8
%region2 = alloca [2006 x float], align 8
%start1 = getelementptr inbounds [2006 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [2006 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [2006 x float]* %region1, i64 0, i64 1024
%ptr2 = getelementptr inbounds [2006 x float]* %region2, i64 0, i64 1024
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
; Repeat f2 in a case that needs the emergency spill slots, because all
; call-clobbered and allocated call-saved registers are live. Note that
; %vptr and %dst are copied to call-saved registers, freeing up %r2 and
; %r3 during the main test.
define void @f10(i32 *%vptr, double *%dst) {
; CHECK-NOFP-LABEL: f10:
; CHECK-NOFP: stg [[REGISTER:%r[1-9][0-4]?]], [[OFFSET:160|168]](%r15)
; CHECK-NOFP: lghi [[REGISTER]], 4096
; CHECK-NOFP: ldeb {{%f[0-7]}}, 0([[REGISTER]],%r15)
; CHECK-NOFP: lg [[REGISTER]], [[OFFSET]](%r15)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f10:
; CHECK-FP: stg [[REGISTER:%r[1-9][0-4]?]], [[OFFSET:160|168]](%r11)
; CHECK-FP: lghi [[REGISTER]], 4096
; CHECK-FP: ldeb {{%f[0-7]}}, 0([[REGISTER]],%r11)
; CHECK-FP: lg [[REGISTER]], [[OFFSET]](%r11)
; CHECK-FP: br %r14
%region1 = alloca [978 x float], align 8
%region2 = alloca [978 x float], align 8
%start1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%ptr1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 2
%ptr2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 2
%i0 = load volatile i32 *%vptr
%i1 = load volatile i32 *%vptr
%i2 = load volatile i32 *%vptr
%i3 = load volatile i32 *%vptr
%i4 = load volatile i32 *%vptr
%i5 = load volatile i32 *%vptr
%i14 = load volatile i32 *%vptr
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
store volatile i32 %i0, i32 *%vptr
store volatile i32 %i1, i32 *%vptr
store volatile i32 %i2, i32 *%vptr
store volatile i32 %i3, i32 *%vptr
store volatile i32 %i4, i32 *%vptr
store volatile i32 %i5, i32 *%vptr
store volatile i32 %i14, i32 *%vptr
ret void
}
; Repeat f2 in a case where the index register is already occupied.
define void @f11(double *%dst, i64 %index) {
; CHECK-NOFP-LABEL: f11:
; CHECK-NOFP: lgr [[REGISTER:%r[1-9][0-5]?]], %r3
; CHECK-NOFP: lay %r1, 4096(%r15)
; CHECK-NOFP: ldeb {{%f[0-7]}}, 0([[REGISTER]],%r1)
; CHECK-NOFP: br %r14
;
; CHECK-FP-LABEL: f11:
; CHECK-FP: lgr [[REGISTER:%r[1-9][0-5]?]], %r3
; CHECK-FP: lay %r1, 4096(%r11)
; CHECK-FP: ldeb {{%f[0-7]}}, 0([[REGISTER]],%r1)
; CHECK-FP: br %r14
%region1 = alloca [978 x float], align 8
%region2 = alloca [978 x float], align 8
%start1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 0
%start2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 0
call void @foo(float *%start1, float *%start2)
%elem1 = getelementptr inbounds [978 x float]* %region1, i64 0, i64 2
%elem2 = getelementptr inbounds [978 x float]* %region2, i64 0, i64 2
%base1 = ptrtoint float *%elem1 to i64
%base2 = ptrtoint float *%elem2 to i64
%addr1 = add i64 %base1, %index
%addr2 = add i64 %base2, %index
%ptr1 = inttoptr i64 %addr1 to float *
%ptr2 = inttoptr i64 %addr2 to float *
%float1 = load float *%ptr1
%float2 = load float *%ptr2
%double1 = fpext float %float1 to double
%double2 = fpext float %float2 to double
store volatile double %double1, double *%dst
store volatile double %double2, double *%dst
ret void
}
|
