https://bugs.llvm.org/show_bug.cgi?id=41179
Bug ID: 41179
Summary: [Loop Vectorize] getOrCreateTripCount fails with
pointer comparisons
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: llvm-...@redking.me.uk
CC: ayal.z...@intel.com, florian_h...@apple.com,
llvm-bugs@lists.llvm.org,
san...@playingwithpointers.com
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13350
; ModuleID = 'bugpoint-reduced-simplified.bc'
source_filename = "llvm/test/Transforms/LoopVectorize/PowerPC/pr30990.ll"
target triple = "powerpc64-unknown-linux-gnu"
define void @foo() {
entry:
br label %while.body
while.body: ; preds = %while.body, %entry
%count.09 = phi i32 [ %add, %while.body ], [ 0, %entry ]
%add = add nsw i32 -1, %count.09
%G = getelementptr i8, i8* undef, i32 %add
%cmp = icmp ult i8* undef, %G
br i1 %cmp, label %while.body, label %while.end.loopexit
while.end.loopexit: ; preds = %while.body
ret void
}
opt -loop-vectorize fuzz.ll -S -o -
opt: /home/simon/LLVM/llvm/lib/Analysis/ScalarEvolution.cpp:4079: const
llvm::SCEV* llvm::ScalarEvolution::getNoopOrZeroExtend(const llvm::SCEV*,
llvm::Type*): Assertion `getTypeSizeInBits(SrcTy) <= getTypeSizeInBits(Ty) &&
"getNoopOrZeroExtend cannot truncate!"' failed.
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