1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 ; Check the libcall and the intrinsic for each case with differing FMF.
6 ; The transform to sqrt is not allowed if we risk setting errno due to -INF.
8 define double @pow_libcall_half_no_FMF(double %x) {
9 ; CHECK-LABEL: @pow_libcall_half_no_FMF(
10 ; CHECK-NEXT: [[POW:%.*]] = call double @pow(double [[X:%.*]], double 5.000000e-01)
11 ; CHECK-NEXT: ret double [[POW]]
13 %pow = call double @pow(double %x, double 5.0e-01)
17 ; The transform to (non-errno setting) sqrt is allowed as long as we deal with -0.0 and -INF.
19 define double @pow_intrinsic_half_no_FMF(double %x) {
20 ; CHECK-LABEL: @pow_intrinsic_half_no_FMF(
21 ; CHECK-NEXT: [[SQRT:%.*]] = call double @llvm.sqrt.f64(double [[X:%.*]])
22 ; CHECK-NEXT: [[ABS:%.*]] = call double @llvm.fabs.f64(double [[SQRT]])
23 ; CHECK-NEXT: [[ISINF:%.*]] = fcmp oeq double [[X]], 0xFFF0000000000000
24 ; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[ISINF]], double 0x7FF0000000000000, double [[ABS]]
25 ; CHECK-NEXT: ret double [[TMP1]]
27 %pow = call double @llvm.pow.f64(double %x, double 5.0e-01)
31 ; `afn` makes no difference, but FMF are propagated/retained.
33 ; (As above) the transform to sqrt may generate EDOM due to -INF. Generally, EDOM implies
34 ; formation of a NaN (which then propagates). `afn` may justify returning NaN (along with
35 ; setting EDOM); however, the conservatively correct approach is to avoid both the NaN and
38 define double @pow_libcall_half_approx(double %x) {
39 ; CHECK-LABEL: @pow_libcall_half_approx(
40 ; CHECK-NEXT: [[POW:%.*]] = call afn double @pow(double [[X:%.*]], double 5.000000e-01)
41 ; CHECK-NEXT: ret double [[POW]]
43 %pow = call afn double @pow(double %x, double 5.0e-01)
47 ; (As above) the transform to (non-errno setting) sqrt is allowed as long as we deal with -0.0
50 define <2 x double> @pow_intrinsic_half_approx(<2 x double> %x) {
51 ; CHECK-LABEL: @pow_intrinsic_half_approx(
52 ; CHECK-NEXT: [[SQRT:%.*]] = call afn <2 x double> @llvm.sqrt.v2f64(<2 x double> [[X:%.*]])
53 ; CHECK-NEXT: [[ABS:%.*]] = call afn <2 x double> @llvm.fabs.v2f64(<2 x double> [[SQRT]])
54 ; CHECK-NEXT: [[ISINF:%.*]] = fcmp afn oeq <2 x double> [[X]], <double 0xFFF0000000000000, double 0xFFF0000000000000>
55 ; CHECK-NEXT: [[TMP1:%.*]] = select afn <2 x i1> [[ISINF]], <2 x double> <double 0x7FF0000000000000, double 0x7FF0000000000000>, <2 x double> [[ABS]]
56 ; CHECK-NEXT: ret <2 x double> [[TMP1]]
58 %pow = call afn <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> <double 5.0e-01, double 5.0e-01>)
62 define float @powf_intrinsic_half_fast(float %x) {
63 ; CHECK-LABEL: @powf_intrinsic_half_fast(
64 ; CHECK-NEXT: [[SQRT:%.*]] = call fast float @llvm.sqrt.f32(float [[X:%.*]])
65 ; CHECK-NEXT: ret float [[SQRT]]
67 %pow = call fast float @llvm.pow.f32(float %x, float 5.0e-01)
71 ; If we can disregard INFs, no need for a select.
73 define double @pow_libcall_half_no_FMF_base_ninf(i32 %x) {
74 ; CHECK-LABEL: @pow_libcall_half_no_FMF_base_ninf(
75 ; CHECK-NEXT: [[CONV:%.*]] = uitofp i32 [[X:%.*]] to double
76 ; CHECK-NEXT: [[SQRT:%.*]] = call double @sqrt(double [[CONV]])
77 ; CHECK-NEXT: [[ABS:%.*]] = call double @llvm.fabs.f64(double [[SQRT]])
78 ; CHECK-NEXT: ret double [[ABS]]
80 %conv = uitofp i32 %x to double
81 %pow = call double @pow(double %conv, double 5.0e-01)
85 define double @pow_libcall_half_ninf(double %x) {
86 ; CHECK-LABEL: @pow_libcall_half_ninf(
87 ; CHECK-NEXT: [[SQRT:%.*]] = call ninf double @sqrt(double [[X:%.*]])
88 ; CHECK-NEXT: [[ABS:%.*]] = call ninf double @llvm.fabs.f64(double [[SQRT]])
89 ; CHECK-NEXT: ret double [[ABS]]
91 %pow = call ninf double @pow(double %x, double 5.0e-01)
95 define <2 x double> @pow_intrinsic_half_ninf(<2 x double> %x) {
96 ; CHECK-LABEL: @pow_intrinsic_half_ninf(
97 ; CHECK-NEXT: [[SQRT:%.*]] = call ninf <2 x double> @llvm.sqrt.v2f64(<2 x double> [[X:%.*]])
98 ; CHECK-NEXT: [[ABS:%.*]] = call ninf <2 x double> @llvm.fabs.v2f64(<2 x double> [[SQRT]])
99 ; CHECK-NEXT: ret <2 x double> [[ABS]]
101 %pow = call ninf <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> <double 5.0e-01, double 5.0e-01>)
102 ret <2 x double> %pow
105 ; If we can disregard -0.0, no need for fabs, but still (because of -INF) cannot use library sqrt.
107 define double @pow_libcall_half_nsz(double %x) {
108 ; CHECK-LABEL: @pow_libcall_half_nsz(
109 ; CHECK-NEXT: [[POW:%.*]] = call nsz double @pow(double [[X:%.*]], double 5.000000e-01)
110 ; CHECK-NEXT: ret double [[POW]]
112 %pow = call nsz double @pow(double %x, double 5.0e-01)
116 define double @pow_intrinsic_half_nsz(double %x) {
117 ; CHECK-LABEL: @pow_intrinsic_half_nsz(
118 ; CHECK-NEXT: [[SQRT:%.*]] = call nsz double @llvm.sqrt.f64(double [[X:%.*]])
119 ; CHECK-NEXT: [[ISINF:%.*]] = fcmp nsz oeq double [[X]], 0xFFF0000000000000
120 ; CHECK-NEXT: [[TMP1:%.*]] = select nsz i1 [[ISINF]], double 0x7FF0000000000000, double [[SQRT]]
121 ; CHECK-NEXT: ret double [[TMP1]]
123 %pow = call nsz double @llvm.pow.f64(double %x, double 5.0e-01)
129 define float @pow_libcall_half_ninf_nsz(float %x) {
130 ; CHECK-LABEL: @pow_libcall_half_ninf_nsz(
131 ; CHECK-NEXT: [[SQRTF:%.*]] = call ninf nsz float @sqrtf(float [[X:%.*]])
132 ; CHECK-NEXT: ret float [[SQRTF]]
134 %pow = call ninf nsz float @powf(float %x, float 5.0e-01)
138 define double @pow_intrinsic_half_ninf_nsz(double %x) {
139 ; CHECK-LABEL: @pow_intrinsic_half_ninf_nsz(
140 ; CHECK-NEXT: [[SQRT:%.*]] = call ninf nsz double @llvm.sqrt.f64(double [[X:%.*]])
141 ; CHECK-NEXT: ret double [[SQRT]]
143 %pow = call ninf nsz double @llvm.pow.f64(double %x, double 5.0e-01)
147 ; Overspecified FMF to test propagation to the new op(s).
149 define float @pow_libcall_half_fast(float %x) {
150 ; CHECK-LABEL: @pow_libcall_half_fast(
151 ; CHECK-NEXT: [[SQRTF:%.*]] = call fast float @sqrtf(float [[X:%.*]])
152 ; CHECK-NEXT: ret float [[SQRTF]]
154 %pow = call fast float @powf(float %x, float 5.0e-01)
158 define double @pow_intrinsic_half_fast(double %x) {
159 ; CHECK-LABEL: @pow_intrinsic_half_fast(
160 ; CHECK-NEXT: [[SQRT:%.*]] = call fast double @llvm.sqrt.f64(double [[X:%.*]])
161 ; CHECK-NEXT: ret double [[SQRT]]
163 %pow = call fast double @llvm.pow.f64(double %x, double 5.0e-01)
167 ; This should not be transformed without some kind of FMF.
168 ; -0.5 means take the reciprocal.
170 define float @pow_libcall_neghalf_no_FMF(float %x) {
171 ; CHECK-LABEL: @pow_libcall_neghalf_no_FMF(
172 ; CHECK-NEXT: [[POW:%.*]] = call float @powf(float [[X:%.*]], float -5.000000e-01)
173 ; CHECK-NEXT: ret float [[POW]]
175 %pow = call float @powf(float %x, float -5.0e-01)
179 ; If we can disregard INFs, a call to a library sqrt is okay.
180 ; Transform to sqrt+fdiv because 'reassoc' allows an extra rounding step.
181 ; Use 'fabs' to handle -0.0 correctly.
183 define float @pow_libcall_neghalf_reassoc_ninf(float %x) {
184 ; CHECK-LABEL: @pow_libcall_neghalf_reassoc_ninf(
185 ; CHECK-NEXT: [[SQRTF:%.*]] = call reassoc ninf float @sqrtf(float [[X:%.*]])
186 ; CHECK-NEXT: [[ABS:%.*]] = call reassoc ninf float @llvm.fabs.f32(float [[SQRTF]])
187 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = fdiv reassoc ninf float 1.000000e+00, [[ABS]]
188 ; CHECK-NEXT: ret float [[RECIPROCAL]]
190 %pow = call reassoc ninf float @powf(float %x, float -5.0e-01)
194 ; If we cannot disregard INFs, a call to a library sqrt is not okay.
196 define float @pow_libcall_neghalf_afn(float %x) {
197 ; CHECK-LABEL: @pow_libcall_neghalf_afn(
198 ; CHECK-NEXT: [[POW:%.*]] = call afn float @powf(float [[X:%.*]], float -5.000000e-01)
199 ; CHECK-NEXT: ret float [[POW]]
201 %pow = call afn float @powf(float %x, float -5.0e-01)
205 ; This should not be transformed without some kind of FMF.
207 define <2 x double> @pow_intrinsic_neghalf_no_FMF(<2 x double> %x) {
208 ; CHECK-LABEL: @pow_intrinsic_neghalf_no_FMF(
209 ; CHECK-NEXT: [[POW:%.*]] = call <2 x double> @llvm.pow.v2f64(<2 x double> [[X:%.*]], <2 x double> <double -5.000000e-01, double -5.000000e-01>)
210 ; CHECK-NEXT: ret <2 x double> [[POW]]
212 %pow = call <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> <double -5.0e-01, double -5.0e-01>)
213 ret <2 x double> %pow
216 ; Transform to sqrt+fdiv because 'reassoc' allows an extra rounding step.
217 ; Use 'fabs' to handle -0.0 correctly.
218 ; Use 'select' to handle -INF correctly.
220 define <2 x double> @pow_intrinsic_neghalf_reassoc(<2 x double> %x) {
221 ; CHECK-LABEL: @pow_intrinsic_neghalf_reassoc(
222 ; CHECK-NEXT: [[SQRT:%.*]] = call reassoc <2 x double> @llvm.sqrt.v2f64(<2 x double> [[X:%.*]])
223 ; CHECK-NEXT: [[ABS:%.*]] = call reassoc <2 x double> @llvm.fabs.v2f64(<2 x double> [[SQRT]])
224 ; CHECK-NEXT: [[ISINF:%.*]] = fcmp reassoc oeq <2 x double> [[X]], <double 0xFFF0000000000000, double 0xFFF0000000000000>
225 ; CHECK-NEXT: [[ABS_OP:%.*]] = fdiv reassoc <2 x double> <double 1.000000e+00, double 1.000000e+00>, [[ABS]]
226 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = select <2 x i1> [[ISINF]], <2 x double> zeroinitializer, <2 x double> [[ABS_OP]]
227 ; CHECK-NEXT: ret <2 x double> [[RECIPROCAL]]
229 %pow = call reassoc <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> <double -5.0e-01, double -5.0e-01>)
230 ret <2 x double> %pow
233 ; Transform to sqrt+fdiv because 'afn' allows an extra rounding step.
234 ; Use 'fabs' to handle -0.0 correctly.
235 ; Use 'select' to handle -INF correctly.
237 define <2 x double> @pow_intrinsic_neghalf_afn(<2 x double> %x) {
238 ; CHECK-LABEL: @pow_intrinsic_neghalf_afn(
239 ; CHECK-NEXT: [[SQRT:%.*]] = call afn <2 x double> @llvm.sqrt.v2f64(<2 x double> [[X:%.*]])
240 ; CHECK-NEXT: [[ABS:%.*]] = call afn <2 x double> @llvm.fabs.v2f64(<2 x double> [[SQRT]])
241 ; CHECK-NEXT: [[ISINF:%.*]] = fcmp afn oeq <2 x double> [[X]], <double 0xFFF0000000000000, double 0xFFF0000000000000>
242 ; CHECK-NEXT: [[ABS_OP:%.*]] = fdiv afn <2 x double> <double 1.000000e+00, double 1.000000e+00>, [[ABS]]
243 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = select <2 x i1> [[ISINF]], <2 x double> zeroinitializer, <2 x double> [[ABS_OP]]
244 ; CHECK-NEXT: ret <2 x double> [[RECIPROCAL]]
246 %pow = call afn <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> <double -5.0e-01, double -5.0e-01>)
247 ret <2 x double> %pow
250 ; If we can disregard INFs, no need for a select.
252 define double @pow_libcall_neghalf_ninf(double %x) {
253 ; CHECK-LABEL: @pow_libcall_neghalf_ninf(
254 ; CHECK-NEXT: [[SQRT:%.*]] = call ninf afn double @sqrt(double [[X:%.*]])
255 ; CHECK-NEXT: [[ABS:%.*]] = call ninf afn double @llvm.fabs.f64(double [[SQRT]])
256 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = fdiv ninf afn double 1.000000e+00, [[ABS]]
257 ; CHECK-NEXT: ret double [[RECIPROCAL]]
259 %pow = call afn ninf double @pow(double %x, double -5.0e-01)
263 define <2 x double> @pow_intrinsic_neghalf_ninf(<2 x double> %x) {
264 ; CHECK-LABEL: @pow_intrinsic_neghalf_ninf(
265 ; CHECK-NEXT: [[SQRT:%.*]] = call ninf afn <2 x double> @llvm.sqrt.v2f64(<2 x double> [[X:%.*]])
266 ; CHECK-NEXT: [[ABS:%.*]] = call ninf afn <2 x double> @llvm.fabs.v2f64(<2 x double> [[SQRT]])
267 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = fdiv ninf afn <2 x double> <double 1.000000e+00, double 1.000000e+00>, [[ABS]]
268 ; CHECK-NEXT: ret <2 x double> [[RECIPROCAL]]
270 %pow = call afn ninf <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> <double -5.0e-01, double -5.0e-01>)
271 ret <2 x double> %pow
274 ; If we can disregard -0.0, no need for fabs, but still (because of -INF) cannot use library sqrt.
276 define double @pow_libcall_neghalf_nsz(double %x) {
277 ; CHECK-LABEL: @pow_libcall_neghalf_nsz(
278 ; CHECK-NEXT: [[POW:%.*]] = call nsz afn double @pow(double [[X:%.*]], double -5.000000e-01)
279 ; CHECK-NEXT: ret double [[POW]]
281 %pow = call afn nsz double @pow(double %x, double -5.0e-01)
285 define double @pow_intrinsic_neghalf_nsz(double %x) {
286 ; CHECK-LABEL: @pow_intrinsic_neghalf_nsz(
287 ; CHECK-NEXT: [[SQRT:%.*]] = call nsz afn double @llvm.sqrt.f64(double [[X:%.*]])
288 ; CHECK-NEXT: [[ISINF:%.*]] = fcmp nsz afn oeq double [[X]], 0xFFF0000000000000
289 ; CHECK-NEXT: [[SQRT_OP:%.*]] = fdiv nsz afn double 1.000000e+00, [[SQRT]]
290 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = select i1 [[ISINF]], double 0.000000e+00, double [[SQRT_OP]]
291 ; CHECK-NEXT: ret double [[RECIPROCAL]]
293 %pow = call afn nsz double @llvm.pow.f64(double %x, double -5.0e-01)
297 ; This is just recip-sqrt.
299 define double @pow_intrinsic_neghalf_ninf_nsz(double %x) {
300 ; CHECK-LABEL: @pow_intrinsic_neghalf_ninf_nsz(
301 ; CHECK-NEXT: [[SQRT:%.*]] = call ninf nsz afn double @llvm.sqrt.f64(double [[X:%.*]])
302 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = fdiv ninf nsz afn double 1.000000e+00, [[SQRT]]
303 ; CHECK-NEXT: ret double [[RECIPROCAL]]
305 %pow = call afn ninf nsz double @llvm.pow.f64(double %x, double -5.0e-01)
309 define float @pow_libcall_neghalf_ninf_nsz(float %x) {
310 ; CHECK-LABEL: @pow_libcall_neghalf_ninf_nsz(
311 ; CHECK-NEXT: [[SQRTF:%.*]] = call ninf nsz afn float @sqrtf(float [[X:%.*]])
312 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = fdiv ninf nsz afn float 1.000000e+00, [[SQRTF]]
313 ; CHECK-NEXT: ret float [[RECIPROCAL]]
315 %pow = call afn ninf nsz float @powf(float %x, float -5.0e-01)
319 ; Overspecified FMF to test propagation to the new op(s).
321 define float @pow_libcall_neghalf_fast(float %x) {
322 ; CHECK-LABEL: @pow_libcall_neghalf_fast(
323 ; CHECK-NEXT: [[SQRTF:%.*]] = call fast float @sqrtf(float [[X:%.*]])
324 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = fdiv fast float 1.000000e+00, [[SQRTF]]
325 ; CHECK-NEXT: ret float [[RECIPROCAL]]
327 %pow = call fast float @powf(float %x, float -5.0e-01)
331 define double @pow_intrinsic_neghalf_fast(double %x) {
332 ; CHECK-LABEL: @pow_intrinsic_neghalf_fast(
333 ; CHECK-NEXT: [[SQRT:%.*]] = call fast double @llvm.sqrt.f64(double [[X:%.*]])
334 ; CHECK-NEXT: [[RECIPROCAL:%.*]] = fdiv fast double 1.000000e+00, [[SQRT]]
335 ; CHECK-NEXT: ret double [[RECIPROCAL]]
337 %pow = call fast double @llvm.pow.f64(double %x, double -5.0e-01)
341 declare double @llvm.pow.f64(double, double) #0
342 declare float @llvm.pow.f32(float, float) #0
343 declare <2 x double> @llvm.pow.v2f64(<2 x double>, <2 x double>) #0
344 declare <2 x float> @llvm.pow.v2f32(<2 x float>, <2 x float>) #0
345 declare <4 x float> @llvm.pow.v4f32(<4 x float>, <4 x float>) #0
346 declare double @pow(double, double)
347 declare float @powf(float, float)
349 attributes #0 = { nounwind readnone speculatable }
350 attributes #1 = { nounwind readnone }