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[mlir][complex] Support Fastmath flag in conversion of complex.sqrt to standard (#85019)
When converting complex.sqrt op to standard, we need to keep the fast math flag given to the op. See: https://discourse.llvm.org/t/rfc-fastmath-flags-support-in-complex-dialect/71981
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-27
lines changed

2 files changed

+134
-27
lines changed

mlir/lib/Conversion/ComplexToStandard/ComplexToStandard.cpp

Lines changed: 8 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -845,21 +845,22 @@ struct SqrtOpConversion : public OpConversionPattern<complex::SqrtOp> {
845845
auto type = cast<ComplexType>(op.getType());
846846
Type elementType = type.getElementType();
847847
Value arg = adaptor.getComplex();
848+
arith::FastMathFlagsAttr fmf = op.getFastMathFlagsAttr();
848849

849850
Value zero =
850851
b.create<arith::ConstantOp>(elementType, b.getZeroAttr(elementType));
851852

852853
Value real = b.create<complex::ReOp>(elementType, adaptor.getComplex());
853854
Value imag = b.create<complex::ImOp>(elementType, adaptor.getComplex());
854855

855-
Value absLhs = b.create<math::AbsFOp>(real);
856-
Value absArg = b.create<complex::AbsOp>(elementType, arg);
857-
Value addAbs = b.create<arith::AddFOp>(absLhs, absArg);
856+
Value absLhs = b.create<math::AbsFOp>(real, fmf);
857+
Value absArg = b.create<complex::AbsOp>(elementType, arg, fmf);
858+
Value addAbs = b.create<arith::AddFOp>(absLhs, absArg, fmf);
858859

859860
Value half = b.create<arith::ConstantOp>(elementType,
860861
b.getFloatAttr(elementType, 0.5));
861-
Value halfAddAbs = b.create<arith::MulFOp>(addAbs, half);
862-
Value sqrtAddAbs = b.create<math::SqrtOp>(halfAddAbs);
862+
Value halfAddAbs = b.create<arith::MulFOp>(addAbs, half, fmf);
863+
Value sqrtAddAbs = b.create<math::SqrtOp>(halfAddAbs, fmf);
863864

864865
Value realIsNegative =
865866
b.create<arith::CmpFOp>(arith::CmpFPredicate::OLT, real, zero);
@@ -869,7 +870,7 @@ struct SqrtOpConversion : public OpConversionPattern<complex::SqrtOp> {
869870
Value resultReal = sqrtAddAbs;
870871

871872
Value imagDivTwoResultReal = b.create<arith::DivFOp>(
872-
imag, b.create<arith::AddFOp>(resultReal, resultReal));
873+
imag, b.create<arith::AddFOp>(resultReal, resultReal, fmf), fmf);
873874

874875
Value negativeResultReal = b.create<arith::NegFOp>(resultReal);
875876

@@ -882,7 +883,7 @@ struct SqrtOpConversion : public OpConversionPattern<complex::SqrtOp> {
882883
resultReal = b.create<arith::SelectOp>(
883884
realIsNegative,
884885
b.create<arith::DivFOp>(
885-
imag, b.create<arith::AddFOp>(resultImag, resultImag)),
886+
imag, b.create<arith::AddFOp>(resultImag, resultImag, fmf), fmf),
886887
resultReal);
887888

888889
Value realIsZero =

mlir/test/Conversion/ComplexToStandard/convert-to-standard.mlir

Lines changed: 126 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -708,11 +708,60 @@ func.func @complex_tanh(%arg: complex<f32>) -> complex<f32> {
708708
// -----
709709

710710
// CHECK-LABEL: func @complex_sqrt
711+
// CHECK-SAME: %[[ARG:.*]]: complex<f32>
711712
func.func @complex_sqrt(%arg: complex<f32>) -> complex<f32> {
712713
%sqrt = complex.sqrt %arg : complex<f32>
713714
return %sqrt : complex<f32>
714715
}
715716

717+
// CHECK: %[[CST:.*]] = arith.constant 0.000000e+00 : f32
718+
// CHECK: %[[VAR0:.*]] = complex.re %[[ARG]] : complex<f32>
719+
// CHECK: %[[VAR1:.*]] = complex.im %[[ARG]] : complex<f32>
720+
// CHECK: %[[VAR2:.*]] = math.absf %[[VAR0]] : f32
721+
// CHECK: %[[CST0:.*]] = arith.constant 0.000000e+00 : f32
722+
// CHECK: %[[CST1:.*]] = arith.constant 1.000000e+00 : f32
723+
// CHECK: %[[VAR3:.*]] = complex.re %[[ARG]] : complex<f32>
724+
// CHECK: %[[VAR4:.*]] = complex.im %[[ARG]] : complex<f32>
725+
// CHECK: %[[VAR5:.*]] = arith.cmpf oeq, %[[VAR3]], %[[CST0]] : f32
726+
// CHECK: %[[VAR6:.*]] = arith.cmpf oeq, %[[VAR4]], %[[CST0]] : f32
727+
// CHECK: %[[VAR7:.*]] = arith.divf %[[VAR4]], %[[VAR3]] : f32
728+
// CHECK: %[[VAR8:.*]] = arith.mulf %[[VAR7]], %[[VAR7]] : f32
729+
// CHECK: %[[VAR9:.*]] = arith.addf %[[VAR8]], %[[CST1]] : f32
730+
// CHECK: %[[VAR10:.*]] = math.sqrt %[[VAR9]] : f32
731+
// CHECK: %[[VAR11:.*]] = math.absf %[[VAR3]] : f32
732+
// CHECK: %[[VAR12:.*]] = arith.mulf %[[VAR10]], %[[VAR11]] : f32
733+
// CHECK: %[[VAR13:.*]] = arith.divf %[[VAR3]], %[[VAR4]] : f32
734+
// CHECK: %[[VAR14:.*]] = arith.mulf %[[VAR13]], %[[VAR13]] : f32
735+
// CHECK: %[[VAR15:.*]] = arith.addf %[[VAR14]], %[[CST1]] : f32
736+
// CHECK: %[[VAR16:.*]] = math.sqrt %[[VAR15]] : f32
737+
// CHECK: %[[VAR17:.*]] = math.absf %[[VAR4]] : f32
738+
// CHECK: %[[VAR18:.*]] = arith.mulf %[[VAR16]], %[[VAR17]] : f32
739+
// CHECK: %[[VAR19:.*]] = arith.cmpf ogt, %[[VAR3]], %[[VAR4]] : f32
740+
// CHECK: %[[VAR20:.*]] = arith.select %[[VAR19]], %[[VAR12]], %[[VAR18]] : f32
741+
// CHECK: %[[VAR21:.*]] = arith.select %[[VAR6]], %[[VAR11]], %[[VAR20]] : f32
742+
// CHECK: %[[VAR22:.*]] = arith.select %[[VAR5]], %[[VAR17]], %[[VAR21]] : f32
743+
// CHECK: %[[VAR23:.*]] = arith.addf %[[VAR2]], %[[VAR22]] : f32
744+
// CHECK: %[[CST2:.*]] = arith.constant 5.000000e-01 : f32
745+
// CHECK: %[[VAR24:.*]] = arith.mulf %[[VAR23]], %[[CST2]] : f32
746+
// CHECK: %[[VAR25:.*]] = math.sqrt %[[VAR24]] : f32
747+
// CHECK: %[[VAR26:.*]] = arith.cmpf olt, %[[VAR0]], %cst : f32
748+
// CHECK: %[[VAR27:.*]] = arith.cmpf olt, %[[VAR1]], %cst : f32
749+
// CHECK: %[[VAR28:.*]] = arith.addf %[[VAR25]], %[[VAR25]] : f32
750+
// CHECK: %[[VAR29:.*]] = arith.divf %[[VAR1]], %[[VAR28]] : f32
751+
// CHECK: %[[VAR30:.*]] = arith.negf %[[VAR25]] : f32
752+
// CHECK: %[[VAR31:.*]] = arith.select %[[VAR27]], %[[VAR30]], %[[VAR25]] : f32
753+
// CHECK: %[[VAR32:.*]] = arith.select %[[VAR26]], %[[VAR31]], %[[VAR29]] : f32
754+
// CHECK: %[[VAR33:.*]] = arith.addf %[[VAR32]], %[[VAR32]] : f32
755+
// CHECK: %[[VAR34:.*]] = arith.divf %[[VAR1]], %[[VAR33]] : f32
756+
// CHECK: %[[VAR35:.*]] = arith.select %[[VAR26]], %[[VAR34]], %[[VAR25]] : f32
757+
// CHECK: %[[VAR36:.*]] = arith.cmpf oeq, %[[VAR0]], %cst : f32
758+
// CHECK: %[[VAR37:.*]] = arith.cmpf oeq, %[[VAR1]], %cst : f32
759+
// CHECK: %[[VAR38:.*]] = arith.andi %[[VAR36]], %[[VAR37]] : i1
760+
// CHECK: %[[VAR39:.*]] = arith.select %[[VAR38]], %cst, %[[VAR35]] : f32
761+
// CHECK: %[[VAR40:.*]] = arith.select %[[VAR38]], %cst, %[[VAR32]] : f32
762+
// CHECK: %[[VAR41:.*]] = complex.create %[[VAR39]], %[[VAR40]] : complex<f32>
763+
// CHECK: return %[[VAR41]] : complex<f32>
764+
716765
// -----
717766

718767
// CHECK-LABEL: func @complex_conj
@@ -1254,42 +1303,42 @@ func.func @complex_atan2_with_fmf(%lhs: complex<f32>,
12541303
// CHECK: %[[CST_6:.*]] = arith.constant 0.000000e+00 : f32
12551304
// CHECK: %[[VAR187:.*]] = complex.re %[[VAR186]] : complex<f32>
12561305
// CHECK: %[[VAR188:.*]] = complex.im %[[VAR186]] : complex<f32>
1257-
// CHECK: %[[VAR189:.*]] = math.absf %[[VAR187]] : f32
1306+
// CHECK: %[[VAR189:.*]] = math.absf %[[VAR187]] fastmath<nnan,contract> : f32
12581307
// CHECK: %[[CST_7:.*]] = arith.constant 0.000000e+00 : f32
12591308
// CHECK: %[[CST_8:.*]] = arith.constant 1.000000e+00 : f32
12601309
// CHECK: %[[VAR190:.*]] = complex.re %[[VAR186]] : complex<f32>
12611310
// CHECK: %[[VAR191:.*]] = complex.im %[[VAR186]] : complex<f32>
12621311
// CHECK: %[[VAR192:.*]] = arith.cmpf oeq, %[[VAR190]], %[[CST_7]] : f32
12631312
// CHECK: %[[VAR193:.*]] = arith.cmpf oeq, %[[VAR191]], %[[CST_7]] : f32
1264-
// CHECK: %[[VAR194:.*]] = arith.divf %[[VAR191]], %[[VAR190]] : f32
1265-
// CHECK: %[[VAR195:.*]] = arith.mulf %[[VAR194]], %[[VAR194]] : f32
1266-
// CHECK: %[[VAR196:.*]] = arith.addf %[[VAR195]], %[[CST_8]] : f32
1267-
// CHECK: %[[VAR197:.*]] = math.sqrt %[[VAR196]] : f32
1268-
// CHECK: %[[VAR198:.*]] = math.absf %[[VAR190]] : f32
1269-
// CHECK: %[[VAR199:.*]] = arith.mulf %[[VAR197]], %[[VAR198]] : f32
1270-
// CHECK: %[[VAR200:.*]] = arith.divf %[[VAR190]], %[[VAR191]] : f32
1271-
// CHECK: %[[VAR201:.*]] = arith.mulf %[[VAR200]], %[[VAR200]] : f32
1272-
// CHECK: %[[VAR202:.*]] = arith.addf %[[VAR201]], %[[CST_8]] : f32
1273-
// CHECK: %[[VAR203:.*]] = math.sqrt %[[VAR202]] : f32
1274-
// CHECK: %[[VAR204:.*]] = math.absf %[[VAR191]] : f32
1275-
// CHECK: %[[VAR205:.*]] = arith.mulf %[[VAR203]], %[[VAR204]] : f32
1313+
// CHECK: %[[VAR194:.*]] = arith.divf %[[VAR191]], %[[VAR190]] fastmath<nnan,contract> : f32
1314+
// CHECK: %[[VAR195:.*]] = arith.mulf %[[VAR194]], %[[VAR194]] fastmath<nnan,contract> : f32
1315+
// CHECK: %[[VAR196:.*]] = arith.addf %[[VAR195]], %[[CST_8]] fastmath<nnan,contract> : f32
1316+
// CHECK: %[[VAR197:.*]] = math.sqrt %[[VAR196]] fastmath<nnan,contract> : f32
1317+
// CHECK: %[[VAR198:.*]] = math.absf %[[VAR190]] fastmath<nnan,contract> : f32
1318+
// CHECK: %[[VAR199:.*]] = arith.mulf %[[VAR197]], %[[VAR198]] fastmath<nnan,contract> : f32
1319+
// CHECK: %[[VAR200:.*]] = arith.divf %[[VAR190]], %[[VAR191]] fastmath<nnan,contract> : f32
1320+
// CHECK: %[[VAR201:.*]] = arith.mulf %[[VAR200]], %[[VAR200]] fastmath<nnan,contract> : f32
1321+
// CHECK: %[[VAR202:.*]] = arith.addf %[[VAR201]], %[[CST_8]] fastmath<nnan,contract> : f32
1322+
// CHECK: %[[VAR203:.*]] = math.sqrt %[[VAR202]] fastmath<nnan,contract> : f32
1323+
// CHECK: %[[VAR204:.*]] = math.absf %[[VAR191]] fastmath<nnan,contract> : f32
1324+
// CHECK: %[[VAR205:.*]] = arith.mulf %[[VAR203]], %[[VAR204]] fastmath<nnan,contract> : f32
12761325
// CHECK: %[[VAR206:.*]] = arith.cmpf ogt, %[[VAR190]], %[[VAR191]] : f32
12771326
// CHECK: %[[VAR207:.*]] = arith.select %[[VAR206]], %[[VAR199]], %[[VAR205]] : f32
12781327
// CHECK: %[[VAR208:.*]] = arith.select %[[VAR193]], %[[VAR198]], %[[VAR207]] : f32
12791328
// CHECK: %[[VAR209:.*]] = arith.select %[[VAR192]], %[[VAR204]], %[[VAR208]] : f32
1280-
// CHECK: %[[VAR210:.*]] = arith.addf %[[VAR189]], %[[VAR209]] : f32
1329+
// CHECK: %[[VAR210:.*]] = arith.addf %[[VAR189]], %[[VAR209]] fastmath<nnan,contract> : f32
12811330
// CHECK: %[[CST_9:.*]] = arith.constant 5.000000e-01 : f32
1282-
// CHECK: %[[VAR211:.*]] = arith.mulf %[[VAR210]], %[[CST_9]] : f32
1283-
// CHECK: %[[VAR212:.*]] = math.sqrt %[[VAR211]] : f32
1331+
// CHECK: %[[VAR211:.*]] = arith.mulf %[[VAR210]], %[[CST_9]] fastmath<nnan,contract> : f32
1332+
// CHECK: %[[VAR212:.*]] = math.sqrt %[[VAR211]] fastmath<nnan,contract> : f32
12841333
// CHECK: %[[VAR213:.*]] = arith.cmpf olt, %[[VAR187]], %[[CST_6]] : f32
12851334
// CHECK: %[[VAR214:.*]] = arith.cmpf olt, %[[VAR188]], %[[CST_6]] : f32
1286-
// CHECK: %[[VAR215:.*]] = arith.addf %[[VAR212]], %[[VAR212]] : f32
1287-
// CHECK: %[[VAR216:.*]] = arith.divf %[[VAR188]], %[[VAR215]] : f32
1335+
// CHECK: %[[VAR215:.*]] = arith.addf %[[VAR212]], %[[VAR212]] fastmath<nnan,contract> : f32
1336+
// CHECK: %[[VAR216:.*]] = arith.divf %[[VAR188]], %[[VAR215]] fastmath<nnan,contract> : f32
12881337
// CHECK: %[[VAR217:.*]] = arith.negf %[[VAR212]] : f32
12891338
// CHECK: %[[VAR218:.*]] = arith.select %[[VAR214]], %[[VAR217]], %[[VAR212]] : f32
12901339
// CHECK: %[[VAR219:.*]] = arith.select %[[VAR213]], %[[VAR218]], %[[VAR216]] : f32
1291-
// CHECK: %[[VAR220:.*]] = arith.addf %[[VAR219]], %[[VAR219]] : f32
1292-
// CHECK: %[[VAR221:.*]] = arith.divf %[[VAR188]], %[[VAR220]] : f32
1340+
// CHECK: %[[VAR220:.*]] = arith.addf %[[VAR219]], %[[VAR219]] fastmath<nnan,contract> : f32
1341+
// CHECK: %[[VAR221:.*]] = arith.divf %[[VAR188]], %[[VAR220]] fastmath<nnan,contract> : f32
12931342
// CHECK: %[[VAR222:.*]] = arith.select %[[VAR213]], %[[VAR221]], %[[VAR212]] : f32
12941343
// CHECK: %[[VAR223:.*]] = arith.cmpf oeq, %[[VAR187]], %[[CST_6]] : f32
12951344
// CHECK: %[[VAR224:.*]] = arith.cmpf oeq, %[[VAR188]], %[[CST_6]] : f32
@@ -1728,3 +1777,60 @@ func.func @complex_div_with_fmf(%lhs: complex<f32>, %rhs: complex<f32>) -> compl
17281777
// CHECK: %[[RESULT_IMAG_WITH_SPECIAL_CASES:.*]] = arith.select %[[RESULT_IS_NAN]], %[[RESULT_IMAG_SPECIAL_CASE_1]], %[[RESULT_IMAG]] : f32
17291778
// CHECK: %[[RESULT:.*]] = complex.create %[[RESULT_REAL_WITH_SPECIAL_CASES]], %[[RESULT_IMAG_WITH_SPECIAL_CASES]] : complex<f32>
17301779
// CHECK: return %[[RESULT]] : complex<f32>
1780+
1781+
// -----
1782+
1783+
// CHECK-LABEL: func @complex_sqrt_with_fmf
1784+
// CHECK-SAME: %[[ARG:.*]]: complex<f32>
1785+
func.func @complex_sqrt_with_fmf(%arg: complex<f32>) -> complex<f32> {
1786+
%sqrt = complex.sqrt %arg fastmath<nnan,contract> : complex<f32>
1787+
return %sqrt : complex<f32>
1788+
}
1789+
1790+
// CHECK: %[[CST:.*]] = arith.constant 0.000000e+00 : f32
1791+
// CHECK: %[[VAR0:.*]] = complex.re %[[ARG]] : complex<f32>
1792+
// CHECK: %[[VAR1:.*]] = complex.im %[[ARG]] : complex<f32>
1793+
// CHECK: %[[VAR2:.*]] = math.absf %[[VAR0]] fastmath<nnan,contract> : f32
1794+
// CHECK: %[[CST0:.*]] = arith.constant 0.000000e+00 : f32
1795+
// CHECK: %[[CST1:.*]] = arith.constant 1.000000e+00 : f32
1796+
// CHECK: %[[VAR3:.*]] = complex.re %[[ARG]] : complex<f32>
1797+
// CHECK: %[[VAR4:.*]] = complex.im %[[ARG]] : complex<f32>
1798+
// CHECK: %[[VAR5:.*]] = arith.cmpf oeq, %[[VAR3]], %[[CST0]] : f32
1799+
// CHECK: %[[VAR6:.*]] = arith.cmpf oeq, %[[VAR4]], %[[CST0]] : f32
1800+
// CHECK: %[[VAR7:.*]] = arith.divf %[[VAR4]], %[[VAR3]] fastmath<nnan,contract> : f32
1801+
// CHECK: %[[VAR8:.*]] = arith.mulf %[[VAR7]], %[[VAR7]] fastmath<nnan,contract> : f32
1802+
// CHECK: %[[VAR9:.*]] = arith.addf %[[VAR8]], %[[CST1]] fastmath<nnan,contract> : f32
1803+
// CHECK: %[[VAR10:.*]] = math.sqrt %[[VAR9]] fastmath<nnan,contract> : f32
1804+
// CHECK: %[[VAR11:.*]] = math.absf %[[VAR3]] fastmath<nnan,contract> : f32
1805+
// CHECK: %[[VAR12:.*]] = arith.mulf %[[VAR10]], %[[VAR11]] fastmath<nnan,contract> : f32
1806+
// CHECK: %[[VAR13:.*]] = arith.divf %[[VAR3]], %[[VAR4]] fastmath<nnan,contract> : f32
1807+
// CHECK: %[[VAR14:.*]] = arith.mulf %[[VAR13]], %[[VAR13]] fastmath<nnan,contract> : f32
1808+
// CHECK: %[[VAR15:.*]] = arith.addf %[[VAR14]], %[[CST1]] fastmath<nnan,contract> : f32
1809+
// CHECK: %[[VAR16:.*]] = math.sqrt %[[VAR15]] fastmath<nnan,contract> : f32
1810+
// CHECK: %[[VAR17:.*]] = math.absf %[[VAR4]] fastmath<nnan,contract> : f32
1811+
// CHECK: %[[VAR18:.*]] = arith.mulf %[[VAR16]], %[[VAR17]] fastmath<nnan,contract> : f32
1812+
// CHECK: %[[VAR19:.*]] = arith.cmpf ogt, %[[VAR3]], %[[VAR4]] : f32
1813+
// CHECK: %[[VAR20:.*]] = arith.select %[[VAR19]], %[[VAR12]], %[[VAR18]] : f32
1814+
// CHECK: %[[VAR21:.*]] = arith.select %[[VAR6]], %[[VAR11]], %[[VAR20]] : f32
1815+
// CHECK: %[[VAR22:.*]] = arith.select %[[VAR5]], %[[VAR17]], %[[VAR21]] : f32
1816+
// CHECK: %[[VAR23:.*]] = arith.addf %[[VAR2]], %[[VAR22]] fastmath<nnan,contract> : f32
1817+
// CHECK: %[[CST2:.*]] = arith.constant 5.000000e-01 : f32
1818+
// CHECK: %[[VAR24:.*]] = arith.mulf %[[VAR23]], %[[CST2]] fastmath<nnan,contract> : f32
1819+
// CHECK: %[[VAR25:.*]] = math.sqrt %[[VAR24]] fastmath<nnan,contract> : f32
1820+
// CHECK: %[[VAR26:.*]] = arith.cmpf olt, %[[VAR0]], %cst : f32
1821+
// CHECK: %[[VAR27:.*]] = arith.cmpf olt, %[[VAR1]], %cst : f32
1822+
// CHECK: %[[VAR28:.*]] = arith.addf %[[VAR25]], %[[VAR25]] fastmath<nnan,contract> : f32
1823+
// CHECK: %[[VAR29:.*]] = arith.divf %[[VAR1]], %[[VAR28]] fastmath<nnan,contract> : f32
1824+
// CHECK: %[[VAR30:.*]] = arith.negf %[[VAR25]] : f32
1825+
// CHECK: %[[VAR31:.*]] = arith.select %[[VAR27]], %[[VAR30]], %[[VAR25]] : f32
1826+
// CHECK: %[[VAR32:.*]] = arith.select %[[VAR26]], %[[VAR31]], %[[VAR29]] : f32
1827+
// CHECK: %[[VAR33:.*]] = arith.addf %[[VAR32]], %[[VAR32]] fastmath<nnan,contract> : f32
1828+
// CHECK: %[[VAR34:.*]] = arith.divf %[[VAR1]], %[[VAR33]] fastmath<nnan,contract> : f32
1829+
// CHECK: %[[VAR35:.*]] = arith.select %[[VAR26]], %[[VAR34]], %[[VAR25]] : f32
1830+
// CHECK: %[[VAR36:.*]] = arith.cmpf oeq, %[[VAR0]], %cst : f32
1831+
// CHECK: %[[VAR37:.*]] = arith.cmpf oeq, %[[VAR1]], %cst : f32
1832+
// CHECK: %[[VAR38:.*]] = arith.andi %[[VAR36]], %[[VAR37]] : i1
1833+
// CHECK: %[[VAR39:.*]] = arith.select %[[VAR38]], %cst, %[[VAR35]] : f32
1834+
// CHECK: %[[VAR40:.*]] = arith.select %[[VAR38]], %cst, %[[VAR32]] : f32
1835+
// CHECK: %[[VAR41:.*]] = complex.create %[[VAR39]], %[[VAR40]] : complex<f32>
1836+
// CHECK: return %[[VAR41]] : complex<f32>

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