http://llvm.org/bugs/show_bug.cgi?id=15990
Bug ID: 15990
Summary: Transforms/Vectorize/LoopVectorize.cpp: Assertion
`NumIncoming > 1 && "Invalid PHI"' failed.
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
test case by csmith/creduce
LLVM r181757, x86_64 linux.
int a;
int b;
unsigned c;
int d;
void fn1 () {
for (; b; ++b) {
c = 0;
for (; c <= 0; c += 1)
d = 0;
a &= !c;
}
}
% clang -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -O3 -backend-option
-vectorize-loops -x c cc.c
clang: llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:2031: void <anonymous
namespace>::InnerLoopVectorizer::vectorizeBlockInLoop(<anonymous>::LoopVectorizationLegality
*, llvm::BasicBlock *, PhiVector *): Assertion `NumIncoming > 1 && "Invalid
PHI"' failed.
Stack dump:
0. Program arguments: clang -cc1 -triple x86_64-unknown-linux-gnu -emit-obj
-O3 -backend-option -vectorize-loops -x c cc.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'cc.c'.
4. Running pass 'Loop Pass Manager' on function '@fn1'
5. Running pass 'Loop Vectorization' on basic block '%for.cond1.preheader'
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