http://llvm.org/bugs/show_bug.cgi?id=18049
Bug ID: 18049
Summary: Assertion failed: getNoopOrZeroExtend cannot truncate!
Product: clang
Version: trunk
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
1. Source code (x.c):
extern int big[];
void f(long long count)
{
for(int i = 0; i < count; ++i)
big[i] = ~big[i];
}
2. Command line:
clang -O2 -march=prescott -c x.c
3. Output:
Assertion failed: (getTypeSizeInBits(SrcTy) <= getTypeSizeInBits(Ty) &&
"getNoopOrZeroExtend cannot truncate!"), function getNoopOrZeroExtend, file
/path/to/llvm-src/lib/Analysis/ScalarEvolution.cpp, line 2845.
Stack dump:
0. Program arguments: /path/to/llvm/bin/clang -cc1 -triple
i386-unknown-freebsd11.0 -emit-obj -disable-free -main-file-name x.c
-mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases
-target-cpu prescott -target-linker-version 2.17.50 -coverage-file
/path/to/testcase/x.o -resource-dir /path/to/llvm/bin/../lib/clang/3.5 -O2
-Wall -fdebug-compilation-dir /path/to/testcase -ferror-limit 19
-fmessage-length 82 -mstackrealign -fobjc-runtime=gnustep
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp
-o x.o -x c x.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'Function Pass Manager' on module 'x.c'.
4. Running pass 'Loop Pass Manager' on function '@f'
5. Running pass 'Loop Vectorization' on basic block '%for.body'
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