c0fc5be60f
**Issue:** When SIMD aligned clause has a alignment value which is not a power of 2, compiler crashes with error Assertion (alignment & (alignment - 1)) == 0 && "alignment is not power of 2" **Fix:** According to LLVM Language Reference manual [[link]](https://llvm.org/docs/LangRef.html#assume-opbundles), the alignment value may be non-power-of-two. In that case, the pointer value must be a null pointer otherwise the behavior is undefined. So instead of emitting `llvm.assume` intrinsic function with a null pointer having the specified alignment, modified the implementation which ignores the aligned clause which has an alignment value which is not a power of 2. This patch also emits a warning indicating that the aligned clause is ignored if the alignment value is not a power of two. It fixes the issue https://github.com/llvm/llvm-project/issues/149458
76 lines
1.6 KiB
Fortran
76 lines
1.6 KiB
Fortran
! RUN: %python %S/../test_errors.py %s %flang -fopenmp
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! OpenMP Version 4.5
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! 2.8.1 simd Construct
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! Semantic error for correct test case
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program omp_simd
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integer i, j, k, c, d(100)
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integer, allocatable :: a(:), b(:)
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common /cmn/ c
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allocate(a(10))
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allocate(b(10))
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!ERROR: List item 'a' present at multiple ALIGNED clauses
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!$omp simd aligned(a, a)
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do i = 1, 10
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a(i) = i
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end do
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!$omp end simd
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!ERROR: List item 'a' present at multiple ALIGNED clauses
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!ERROR: List item 'b' present at multiple ALIGNED clauses
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!$omp simd aligned(a,a) aligned(b) aligned(b)
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do i = 1, 10
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a(i) = i
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b(i) = i
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end do
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!$omp end simd
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!ERROR: List item 'a' present at multiple ALIGNED clauses
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!$omp simd aligned(a) aligned(a)
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do i = 1, 10
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a(i) = i
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end do
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!$omp end simd
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!$omp simd aligned(a) aligned(b)
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do i = 1, 10
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a(i) = i
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b(i) = i
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end do
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!$omp end simd
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!ERROR: List item 'a' present at multiple ALIGNED clauses
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!$omp simd aligned(a) private(a) aligned(a)
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do i = 1, 10
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a(i) = i
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b(i) = i
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end do
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!$omp end simd
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print *, a
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!ERROR: 'c' is a common block name and can not appear in an ALIGNED clause
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!$omp simd aligned(c)
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do i = 1, 10
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c = 5
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end do
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!$omp end simd
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!ERROR: 'd' in ALIGNED clause must be of type C_PTR, POINTER or ALLOCATABLE
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!WARNING: Alignment is not a power of 2, Aligned clause will be ignored [-Wopen-mp-usage]
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!$omp simd aligned(d:100)
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do i = 1, 100
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d(i) = i
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end do
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!WARNING: Alignment is not a power of 2, Aligned clause will be ignored [-Wopen-mp-usage]
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!$omp simd aligned(b:65)
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do i = 1, 100
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b(i) = i
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end do
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end program omp_simd
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