[PATCH] D86119: [OPENMP50]Allow overlapping mapping in target constrcuts.

[George Rokos via Phabricator via cfe-commits]

grokos added a comment.

In D86119#2561163 <https://reviews.llvm.org/D86119#2561163>, @abhinavgaba wrote:

> Thanks for the changes, Alexey! I tried the patch locally, and it looks stable. It handled several tests I tried, including the following case involving array section on a pointer to pointer base, and nested mappers with `PTR_AND_OBJ` maps successfully:
>
>   #include <stdio.h>
>   
>   typedef struct { int a; double *b; } C;
>   #pragma omp declare mapper(id1: C s) map(to:s.a) map(from:s.b[0:2])
>   
>   typedef struct { int e; C f; int h; short *g; } D;
>   #pragma omp declare mapper(default: D r) map(from:r.e) map(mapper(id1), tofrom:r.f) map(tofrom: r.g[0:r.h])
>   
>   int main() {
>     constexpr int N = 10;
>     D s;
>     s.e = 111;
>     s.f.a = 222;
>     double x[2]; x[1] = 20;
>     short y[N]; y[1] = 30;
>     s.f.b = &x[0];
>     s.g = &y[0];
>     s.h = N;
>   
>     D* sp = &s;
>     D** spp = &sp;
>   
>     printf("%d %d %lf %p %d %p\n", spp[0][0].e, spp[0][0].f.a, spp[0][0].f.b[1], spp[0][0].f.b, spp[0][0].g[1], spp[0][0].g);
>     // Expected: 111 222 20.0 <host_addr1> 30 <host_addr2>
>   
>     #pragma omp target map(tofrom:spp[0][0])
>     {
>       printf("%d %d %lf %p %d %p\n", spp[0][0].e, spp[0][0].f.a, spp[0][0].f.b[1], spp[0][0].f.b, spp[0][0].g[1], spp[0][0].g);
>       // Expected: <not 111> 222 <not 20.0> <dev_addr1> 30 <dev_addr2>
>       spp[0][0].e = 333;
>       spp[0][0].f.a = 444;
>       spp[0][0].f.b[1] = 40;
>       spp[0][0].g[1] = 50;
>     }
>     printf("%d %d %lf %p %d %p\n", spp[0][0].e, spp[0][0].f.a, spp[0][0].f.b[1], spp[0][0].f.b, spp[0][0].g[1], spp[0][0].g);
>     // Expected: 333 222 40.0 <host_addr1> 50 <host_addr2>
>   }

@ABataev This is a nice complex example, I think it's worth including it in the runtime tests (under libomptarget).

@abhinavgaba Thanks for providing it!


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