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[flang][cuda] Set alloca block in cuf kernel #128776

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Merged
merged 1 commit into from
Feb 26, 2025
Merged

[flang][cuda] Set alloca block in cuf kernel #128776

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3 changes: 3 additions & 0 deletions flang/lib/Optimizer/Builder/FIRBuilder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -264,6 +264,9 @@ mlir::Block *fir::FirOpBuilder::getAllocaBlock() {
return recipeIface.getAllocaBlock(getRegion());
}

if (auto cufKernelOp = getRegion().getParentOfType<cuf::KernelOp>())
return &cufKernelOp.getRegion().front();

return getEntryBlock();
}

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29 changes: 29 additions & 0 deletions flang/test/Lower/CUDA/cuda-kernel-alloca-block.cuf
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@@ -0,0 +1,29 @@
! RUN: bbc -emit-fir -hlfir -fcuda %s -o - | FileCheck %s

module char1

character*1, dimension(:), allocatable, device :: da, db

contains
attributes(device) logical function check_char( c1, c2 )
character*1, value :: c1, c2
check_char = .false.
if(c1 .eq. c2) check_char = .true.
end function
end module

program p
use char1
integer :: n, i
!$cuf kernel do(1)<<<*,*>>>
do i = 1, n
if (check_char(da(i),db(i))) then
print*,'same'
endif
enddo
end program

! CHECK-LABEL: func.func @_QQmain()
! CHECK: cuf.kernel
! CHECK-COUNT-2: %{{.*}} = fir.alloca !fir.char<1> {bindc_name = ".tmp"}

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