[llvm-bugs] [Bug 33387] New: -verify-scev is causing hang or just taking forever
llvm-bugs at lists.llvm.org
Fri Jun 9 09:59:22 PDT 2017
Bug ID: 33387
Summary: -verify-scev is causing hang or just taking forever
Component: Loop Optimizer
Assignee: unassignedbugs at nondot.org
Reporter: paulsson at linux.vnet.ibm.com
CC: llvm-bugs at lists.llvm.org
Created attachment 18604
This test case takes a second to compile with clang, but with -mllvm
-verify-scev, it does not seem to terminate after even an hour...
It seems that GlobalsModRef.cpp is recursing very heavily in
When I try this->dump() on the Constant, the dumping never ends, so this seems
to be either crazy or something that the algorithm should guard against.
bin/clang -cc1 -triple s390x-ibm-linux -S -target-cpu z13 -O3 -vectorize-loops
-vectorize-slp -o /dev/null -x ir ~/build-dev/test4.bc -mllvm -verify-scev
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