http://llvm.org/bugs/show_bug.cgi?id=11570
Bug #: 11570
Summary: boost karma causes clang optimizer crash
Product: clang
Version: trunk
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: release blocker
Priority: P
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 7727
--> http://llvm.org/bugs/attachment.cgi?id=7727
the code that causes the crash
I have distilled the crash down to a simple one liner that causes the compiler
to fresh with the error
fatal error: error in backend: Cannot select: 0x7fa5b6abb210: i64 = shl
0x7fa5b6ae0c10, 0x7fa5b6ab7c10 [ID=23]
0x7fa5b6ae0c10: i64 = fgetsign 0x7fa5b6ae0a10 [ID=21]
0x7fa5b6ae0a10: f64,ch = CopyFromReg 0x7fa5b5b6c528, 0x7fa5b6ae0b10
[ORD=324] [ID=17]
0x7fa5b6ae0b10: f64 = Register %vreg1 [ORD=324] [ID=1]
0x7fa5b6ab7c10: i64 = Constant<63> [ID=16]
When the optimization (-0) is turned on. Without optimization it compiles
fine.
To reproduce it:
CC=clang++
#Any boost seems to do it
BOOST_HDRS=/opt/local/include
#BOOST_HDRS=~/projs/boost/boost_1_45_0
echo "No optimization"
$CC -c -I$BOOST_HDRS test_karma.cpp
echo "With -O optimization (expected failure)"
$CC -c -O -I$BOOST_HDRS test_karma.cpp
The error happens on clang++ version 3.0 from apple and on llvm trunk (r146173)
and clang trunk (r146174).
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