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9 Commits

Author SHA1 Message Date
Alexey Bataev db39021cee [OPENMP] -fopenmp enables OpenMP support (fix for http://llvm.org/PR23492) 
-fopenmp turns on OpenMP support and links libiomp5 as OpenMP library. Also there is -fopenmp={libiomp5|libgomp} option that allows to override effect of -fopenmp and link libgomp library (if -fopenmp=libgomp is specified).
Differential Revision: http://reviews.llvm.org/D9736

llvm-svn: 237769
 2015-05-20 04:24:19 +00:00
Alexey Bataev 6ddfe1a6af [OPENMP] Fix for checking of data-sharing attributes for canonical var decls only. 
Currently checks for active data-sharing attributes for variables are performed for found var decls. Instead these checks must be performed for canonical decls of these variables to avoid possible troubles with with the differently qualified re-declarations of the same variable, for example:
namespace A { int x; }
namespace B { using A::x; }
Both A::x and B::x actually reference the same object A::x and this fact must be taken into account during data-sharing attributes analysis.

llvm-svn: 235096
 2015-04-16 13:49:42 +00:00
Alexey Bataev 794ba0dcb7 [OPENMP] Codegen for 'reduction' clause in 'parallel' directive. 
Emit a code for reduction clause. Next code should be emitted for reductions:

static kmp_critical_name lock = { 0 };

void reduce_func(void *lhs[<n>], void *rhs[<n>]) {
  ...
  *(Type<i> *)lhs[i] = RedOp<i>(*(Type<i> *)lhs[i], *(Type<i> *)rhs[i]);
  ...
}

... void *RedList[<n>] = {&<RHSExprs>[0], ..., &<RHSExprs>[<n> - 1]};
switch (__kmpc_reduce{_nowait}(<loc>, <gtid>, <n>, sizeof(RedList), RedList, reduce_func, &<lock>)) {
case 1:
  ...
  <LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]);
  ...
  __kmpc_end_reduce{_nowait}(<loc>, <gtid>, &<lock>);
  break;
case 2:
  ...
  Atomic(<LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]));
  ...
  break;
default:
  ;
}
Reduction variables are a kind of a private variables, they have private copies, but initial values are chosen in accordance with the reduction operation.

Differential Revision: http://reviews.llvm.org/D8915

llvm-svn: 234583
 2015-04-10 10:43:45 +00:00
Alexey Bataev 24b04aa393 [OPENMP] Fixed data-sharing attributes processing for variables with global 
storage.
This fix allows to use non-constant global variables, static local variables and static data
members in data-sharing attribute clauses in parallel and task regions.

llvm-svn: 226250
 2015-01-16 07:11:33 +00:00
Alexey Bataev 7ff5524f7e [OPENMP] Improved diagnostic messages for vars with the predetermined data sharing attributes and reformatting 
llvm-svn: 211262
 2014-06-19 09:13:45 +00:00
Alexey Bataev f29276edb7 [OPENMP] Initial support for '#pragma omp for' (fixed incompatibility with MSVC). 
llvm-svn: 211140
 2014-06-18 04:14:57 +00:00
Rafael Espindola a566efbec9 Revert "[OPENMP] Initial support for '#pragma omp for'." 
This reverts commit r211096. Looks like it broke the msvc build:

SemaOpenMP.cpp(140) : error C4519: default template arguments are only allowed on a class template

llvm-svn: 211113
 2014-06-17 17:20:53 +00:00
Alexey Bataev c77dd5257a [OPENMP] Initial support for '#pragma omp for'. 
llvm-svn: 211096
 2014-06-17 11:49:22 +00:00
Alexey Bataev c5e025831b [OPENMP] Initial support of 'reduction' clause 
llvm-svn: 211007
 2014-06-16 07:08:35 +00:00