llvm-project

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// RUN: %libomptarget-compile-generic -fopenmp-version=51
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// RUN: %libomptarget-run-fail-generic 2>&1 \
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// RUN: | %fcheck-generic
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// The host memory layout for the following program looks like this:
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//
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//   | 4 bytes | 4 bytes | 8 bytes |
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//   |   s.x   |   s.y   |   s.z   |
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//   `-----------------------------'
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//
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// s is always at least 8-byte aligned in host memory due to s.z, so
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// libomptarget's device padding for map(s.y,s.z) always maps to host memory
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// that includes s.x.  At one time, s.x appeared to be mapped as a result, but
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// libomptarget has since been fixed not to consider device padding as mapped to
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// host memory.
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#include <omp.h>
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#include <stdio.h>
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int main() {
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  struct S { int x; int y; double z; } s = {1, 2, 3};
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  // CHECK: &s.x = 0x[[#%x,HOST_ADDR:]], size = [[#%u,SIZE:]]
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  fprintf(stderr, "&s = %p\n", &s);
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  fprintf(stderr, "&s.x = %p, size = %ld\n", &s.x, sizeof s.x);
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  fprintf(stderr, "&s.y = %p\n", &s.y);
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  fprintf(stderr, "&s.z = %p\n", &s.z);
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  // CHECK: s.x is present: 0
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  // CHECK: s.x = 1{{$}}
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  #pragma omp target enter data map(alloc: s.y, s.z)
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  int dev = omp_get_default_device();
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  fprintf(stderr, "s.x is present: %d\n", omp_target_is_present(&s.x, dev));
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  #pragma omp target update from(s.x) // should have no effect
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  fprintf(stderr, "s.x = %d\n", s.x);
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  // CHECK: omptarget message: device mapping required by 'present' map type modifier does not exist for host address 0x{{0*}}[[#HOST_ADDR]] ([[#SIZE]] bytes)
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  // CHECK: omptarget error: Call to getTargetPointer returned null pointer ('present' map type modifier).
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  // CHECK: omptarget fatal error 1: failure of target construct while offloading is mandatory
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  #pragma omp target enter data map(present, alloc: s.x)
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  return 0;
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}
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