Using xilink with /Qipo and /Qparallel options may cause an Internal compiler error

Reference Number : DPD200110663


Version : 11.0.066


Operating System : Windows, Linux


Problem Description : When an application is compiled using /Qipo for Windows* (-ipo for Linux*) and /Qparallel for Windows* (-parallel for Linux) and the final link is performed by invoking the xilink utility directly, this may result in an internal compiler error.

Independent use of either "ipo" or "parallel" and linking with xilink will avoid the internal error. This issue applies only to the 11.0.xxx release of the Intel® C++ Compiler with Build Date: 20081105 or later.

The two compilation steps shown below demonstrate how the error can occur:

icl -c /Qipo /Qvc9 /Qparallel .\matmul.c
Intel® C++ Compiler Professional for applications running on IA-32, Version 11.0 Build 20081105 Package ID: w_cproc_p_11.0.066
Copyright (C) 1985-2008 Intel Corporation. All rights reserved.
matmul.c

xilink /OUT:".\matmul.exe" .\matmul.obj
ipo: remark #11001: performing single-file optimizations
ipo: remark #11005: generating object file ipo_33606obj.obj
....\matmul\test\matmul.c(26):
(col. 4) remark: LOOP WAS AUTO-PARALLELIZED.
...matmul\test\matmul.c(36):
(col. 4) remark: LOOP WAS AUTO-PARALLELIZED.
(0): internal error: backend signals

xilink: error #10014: problem during multi-file optimization compilation (code 4)
xilink: error #10014: problem during multi-file optimization compilation (code 4)


Resolution Status : This issue is resolved in the Intel® C++ Compiler 11.0.072. In lieu of upgrading, as a work-around, use either the "parallel" or "ipo" option only.


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