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[Flang] Generate math.erfc op for non-precise erfc interinsic calls #128897

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Merged
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Feb 27, 2025
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[Flang] Generate math.erfc op for non-precise erfc interinsic calls #128897

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6 changes: 4 additions & 2 deletions flang/lib/Optimizer/Builder/IntrinsicCall.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1277,8 +1277,10 @@ static constexpr MathOperation mathOperations[] = {
{"erf", "erf", genFuncType<Ty::Real<8>, Ty::Real<8>>,
genMathOp<mlir::math::ErfOp>},
{"erf", RTNAME_STRING(ErfF128), FuncTypeReal16Real16, genLibF128Call},
{"erfc", "erfcf", genFuncType<Ty::Real<4>, Ty::Real<4>>, genLibCall},
{"erfc", "erfc", genFuncType<Ty::Real<8>, Ty::Real<8>>, genLibCall},
{"erfc", "erfcf", genFuncType<Ty::Real<4>, Ty::Real<4>>,
genMathOp<mlir::math::ErfcOp>},
{"erfc", "erfc", genFuncType<Ty::Real<8>, Ty::Real<8>>,
genMathOp<mlir::math::ErfcOp>},
{"erfc", RTNAME_STRING(ErfcF128), FuncTypeReal16Real16, genLibF128Call},
{"exp", "expf", genFuncType<Ty::Real<4>, Ty::Real<4>>,
genMathOp<mlir::math::ExpOp>},
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20 changes: 12 additions & 8 deletions flang/test/Lower/Intrinsics/erfc.f90
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@@ -1,22 +1,26 @@
! RUN: bbc -emit-fir %s -o - --math-runtime=fast | FileCheck --check-prefixes=ALL %s
! RUN: %flang_fc1 -emit-fir -mllvm -math-runtime=fast %s -o - | FileCheck --check-prefixes=ALL %s
! RUN: bbc -emit-fir %s -o - --math-runtime=relaxed | FileCheck --check-prefixes=ALL %s
! RUN: %flang_fc1 -emit-fir -mllvm -math-runtime=relaxed %s -o - | FileCheck --check-prefixes=ALL %s
! RUN: bbc -emit-fir %s -o - --math-runtime=precise | FileCheck --check-prefixes=ALL %s
! RUN: %flang_fc1 -emit-fir -mllvm -math-runtime=precise %s -o - | FileCheck --check-prefixes=ALL %s
! RUN: bbc -emit-fir %s -o - --math-runtime=fast | FileCheck --check-prefixes=ALL,FAST %s
! RUN: %flang_fc1 -emit-fir -mllvm -math-runtime=fast %s -o - | FileCheck --check-prefixes=ALL,FAST %s
! RUN: bbc -emit-fir %s -o - --math-runtime=relaxed | FileCheck --check-prefixes=ALL,RELAXED %s
! RUN: %flang_fc1 -emit-fir -mllvm -math-runtime=relaxed %s -o - | FileCheck --check-prefixes=ALL,RELAXED %s
! RUN: bbc -emit-fir %s -o - --math-runtime=precise | FileCheck --check-prefixes=ALL,PRECISE %s
! RUN: %flang_fc1 -emit-fir -mllvm -math-runtime=precise %s -o - | FileCheck --check-prefixes=ALL,PRECISE %s

function test_real4(x)
real :: x, test_real4
test_real4 = erfc(x)
end function

! ALL-LABEL: @_QPtest_real4
! ALL: {{%[A-Za-z0-9._]+}} = fir.call @erfcf({{%[A-Za-z0-9._]+}}) {{.*}}: (f32) -> f32
! FAST: {{%[A-Za-z0-9._]+}} = math.erfc {{%[A-Za-z0-9._]+}} {{.*}}: f32
! RELAXED: {{%[A-Za-z0-9._]+}} = math.erfc {{%[A-Za-z0-9._]+}} {{.*}}: f32
! PRECISE: {{%[A-Za-z0-9._]+}} = fir.call @erfcf({{%[A-Za-z0-9._]+}}) {{.*}}: (f32) -> f32

function test_real8(x)
real(8) :: x, test_real8
test_real8 = erfc(x)
end function

! ALL-LABEL: @_QPtest_real8
! ALL: {{%[A-Za-z0-9._]+}} = fir.call @erfc({{%[A-Za-z0-9._]+}}) {{.*}}: (f64) -> f64
! FAST: {{%[A-Za-z0-9._]+}} = math.erfc {{%[A-Za-z0-9._]+}} {{.*}}: f64
! RELAXED: {{%[A-Za-z0-9._]+}} = math.erfc {{%[A-Za-z0-9._]+}} {{.*}}: f64
! PRECISE: {{%[A-Za-z0-9._]+}} = fir.call @erfc({{%[A-Za-z0-9._]+}}) {{.*}}: (f64) -> f64