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Bug 1131 - generalmatrixmatrix.h MSVC 2015 + openmp fails
Summary: generalmatrixmatrix.h MSVC 2015 + openmp fails
Status: RESOLVED DUPLICATE of bug 1096
Alias: None
Product: Eigen
Classification: Unclassified
Component: General (show other bugs)
Version: 3.2
Hardware: x86 - 64-bit Windows
: Normal Compilation Problem
Assignee: Nobody
Depends on:
Reported: 2015-12-10 13:36 UTC by Martijn Berger
Modified: 2019-12-04 15:15 UTC (History)
3 users (show)


Description Martijn Berger 2015-12-10 13:36:25 UTC
Eigen 3.2.7

Error	C1001	An internal error has occurred in the compiler.	c:\dev\blender\extern\eigen3\eigen\src\core\products\generalmatrixmatrix.h	62	

fatal error C1001: An internal error has occurred in the compiler.
1>  (compiler file 'f:\dd\vctools\compiler\utc\src\p2\main.c', line 246)
1>   To work around this problem, try simplifying or changing the program near the locations listed above.
1>  Please choose the Technical Support command on the Visual C++
1>   Help menu, or open the Technical Support help file for more information

This happens only in MSVC 2015 SP1 and not in 2013 SP4 or SP5.

I hacked around it by doing: 

--- a/extern/Eigen3/Eigen/src/Core/products/GeneralMatrixMatrix.h
+++ b/extern/Eigen3/Eigen/src/Core/products/GeneralMatrixMatrix.h
@@ -140,8 +140,14 @@ static void run(Index rows, Index cols, Index depth,
       // Release all the sub blocks B'_j of B' for the current thread,
       // i.e., we simply decrement the number of users by 1
       for(Index j=0; j<threads; ++j)
+      {
         #pragma omp atomic
+#if !defined(_MSC_VER)
+        (info[j].users) -= 1;
+      }
Comment 1 Gael Guennebaud 2015-12-10 15:12:33 UTC

*** This bug has been marked as a duplicate of bug 1096 ***
Comment 2 Nobody 2019-12-04 15:15:56 UTC
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