https://bugs.llvm.org/show_bug.cgi?id=35246
Bug ID: 35246
Summary: Clang hangs in "Simplify the CFG"
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: pauls...@linux.vnet.ibm.com
CC: llvm-bugs@lists.llvm.org
Created attachment 19385
--> https://bugs.llvm.org/attachment.cgi?id=19385&action=edit
reduced testcase
Csmith discovered a program where clang just hangs at -O3, but runs at -O1.
The problem seems to be in "Simplify the CFG".
bin/clang -cc1 -triple s390x-ibm-linux -S -target-cpu z13 -v -O3 -w -emit-llvm
-x ir tc_hang.ll
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