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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - JITed getelementptr on external symbols computes incorrect address on 32 bit Windows"
href="https://bugs.llvm.org/show_bug.cgi?id=33344">33344</a>
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<tr>
<th>Summary</th>
<td>JITed getelementptr on external symbols computes incorrect address on 32 bit Windows
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>4.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nikodemus@random-state.net
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Reproduction using lli on Windows 10 & LLVM 4.0:
$ cat jit-0.ll
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i686-pc-windows-msvc"
@foo = global { i8*, i32 } undef
$ cat jit-1-clobber.ll
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i686-pc-windows-msvc"
@foo = external global { i8*, i32 }
define void @setfoo() {
entry:
%p = inttoptr i32 42 to i8*
store i8* %p, i8** getelementptr inbounds ({ i8*, i32 }, { i8*, i32 }* @foo,
i32 0, i32 0), align 4
store i32 13, i32* getelementptr inbounds ({ i8*, i32 }, { i8*, i32 }* @foo,
i32 0, i32 1), align 4
ret void
}
$ cat jit-1-noclobber.ll
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i686-pc-windows-msvc"
@foo = external global { i8*, i32 }
define void @setfoo() {
entry:
%p = inttoptr i32 42 to i8*
store i8* %p, i8** getelementptr inbounds ({ i8*, i32 }, { i8*, i32 }* @foo,
i32 0, i32 0), align 4
ret void
}
$ cat main.ll
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i686-pc-windows-msvc"
declare void @setfoo()
@foo = external global { i8*, i32 }
define i32 @main() {
call void() @setfoo()
%p = getelementptr inbounds { i8*, i32 }, { i8*, i32 }* @foo, i32 0, i32 0
%v = load i8*, i8** %p
%i = ptrtoint i8* %v to i32
ret i32 %i
}
$ lli -jit-kind=orc-mcjit -extra-module=jit-0.ll
-extra-module=jit-1-noclobber.ll main.ll; echo $?
42
$ lli -jit-kind=orc-mcjit -extra-module=jit-0.ll -extra-module=jit-1-clobber.ll
main.ll; echo $?
13
Both cases should return 42.</pre>
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