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* omp-low.c (struct omp_context): Add for_simd_scan_phase member.
(maybe_lookup_ctx): Add forward declaration.
(omp_find_scan): Likewise. Walk into body of simd if composited
with worksharing loop.
(scan_omp_simd_scan): New function.
(scan_omp_1_stmt): Call it.
(lower_rec_simd_input_clauses): Don't create rvar nor rvar2 if
ctx->for_simd_scan_phase.
(lower_rec_input_clauses): Do much less work for inscan reductions
in ctx->for_simd_scan_phase is_simd regions.
(lower_omp_scan): Set is_simd also on simd constructs composited
with worksharing loop, unless ctx->for_simd_scan_phase. Never emit
a sorry message. Don't change GIMPLE_OMP_SCAN stmts into nops and
emit their body after in simd constructs composited with worksharing
loop.
(lower_omp_for_scan): Handle worksharing loop composited with simd.
* c-c++-common/gomp/scan-4.c: Don't expect sorry message.
* testsuite/libgomp.c/scan-11.c: New test.
* testsuite/libgomp.c/scan-12.c: New test.
* testsuite/libgomp.c/scan-13.c: New test.
* testsuite/libgomp.c/scan-14.c: New test.
* testsuite/libgomp.c/scan-15.c: New test.
* testsuite/libgomp.c/scan-16.c: New test.
* testsuite/libgomp.c/scan-17.c: New test.
* testsuite/libgomp.c/scan-18.c: New test.
* testsuite/libgomp.c++/scan-9.C: New test.
* testsuite/libgomp.c++/scan-10.C: New test.
* testsuite/libgomp.c++/scan-11.C: New test.
* testsuite/libgomp.c++/scan-12.C: New test.
* testsuite/libgomp.c++/scan-13.C: New test.
* testsuite/libgomp.c++/scan-14.C: New test.
* testsuite/libgomp.c++/scan-15.C: New test.
* testsuite/libgomp.c++/scan-16.C: New test.
From-SVN: r273157
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