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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - GVN crashes on the following example"
href="https://llvm.org/bugs/show_bug.cgi?id=24397">24397</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>GVN crashes on the following example
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>michael.v.zolotukhin@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Test case:
----------------------
; RUN: opt -basicaa -gvn -march arm64 < %s | FileCheck %s
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
%struct.A = type { [30 x %struct.B*] }
%struct.B = type { %struct.B* }
@A = external global %struct.A, align 8
@B = external global [50 x %struct.B], align 8
; CHECK-LABEL: @foo
; CHECK: ret void
define void @foo() {
entry:
br label %BB1
entry2:
br label %BB2
BB1:
%idxprom = load i64, i64* undef, align 1
%arrayidx = getelementptr inbounds %struct.A, %struct.A* @A, i64 0, i32 0,
i64 %idxprom
%p = load %struct.B*, %struct.B** %arrayidx, align 8
%cmpnull = icmp eq %struct.B* %p, null
br i1 %cmpnull, label %BB2, label %exit
BB2:
%bc = bitcast %struct.B** %arrayidx to i64*
%load = load i64, i64* %bc, align 8
store i64 %load, i64* bitcast (%struct.B** getelementptr inbounds ([50 x
%struct.B], [50 x %struct.B]* @B, i64 0, i64 35, i32 0) to i64*), align 8
br label %exit
exit:
ret void
}
----------------------
Stack trace:
$ opt -basicaa -gvn < r.ll -march arm64 -S
Assertion failed: (isa<X>(Val) && "cast<Ty>() argument of incompatible type!"),
function cast, file
/Users/buildslave/devel/llvm.git/include/llvm/Support/Casting.h, line 237.
0 opt 0x000000010c85cafe
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 46
...
9 opt 0x000000010b2f94ec
llvm::cast_retty<llvm::Instruction, llvm::Value*>::ret_type
llvm::cast<llvm::Instruction, llvm::Value>(llvm::Value*) + 108
10 opt 0x000000010b979f6d
llvm::PHITransAddr::InsertPHITranslatedSubExpr(llvm::Value*, llvm::BasicBlock*,
llvm::BasicBlock*, llvm::DominatorTree const&,
llvm::SmallVectorImpl<llvm::Instruction*>&) + 237
11 opt 0x000000010b97a224
llvm::PHITransAddr::InsertPHITranslatedSubExpr(llvm::Value*, llvm::BasicBlock*,
llvm::BasicBlock*, llvm::DominatorTree const&,
llvm::SmallVectorImpl<llvm::Instruction*>&) + 932
12 opt 0x000000010b97a01b
llvm::PHITransAddr::InsertPHITranslatedSubExpr(llvm::Value*, llvm::BasicBlock*,
llvm::BasicBlock*, llvm::DominatorTree const&,
llvm::SmallVectorImpl<llvm::Instruction*>&) + 411
13 opt 0x000000010b979e06
llvm::PHITransAddr::PHITranslateWithInsertion(llvm::BasicBlock*,
llvm::BasicBlock*, llvm::DominatorTree const&,
llvm::SmallVectorImpl<llvm::Instruction*>&) + 86
14 opt 0x000000010c5703fe (anonymous
namespace)::GVN::PerformLoadPRE(llvm::LoadInst*, llvm::SmallVector<(anonymous
namespace)::AvailableValueInBlock, 64u>&, llvm::SmallVector<llvm::BasicBlock*,
64u>&) + 2654
15 opt 0x000000010c56e80e (anonymous
namespace)::GVN::processNonLocalLoad(llvm::LoadInst*) + 1390
16 opt 0x000000010c56ac8f (anonymous
namespace)::GVN::processLoad(llvm::LoadInst*) + 1551</pre>
</div>
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