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<body><span class="vcard"><a class="email" href="mailto:dan433584@gmail.com" title="Dan Gohman <dan433584@gmail.com>"> <span class="fn">Dan Gohman</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Stack get and set use wrong global id"
href="https://bugs.llvm.org/show_bug.cgi?id=32771">bug 32771</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Stack get and set use wrong global id"
href="https://bugs.llvm.org/show_bug.cgi?id=32771#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Stack get and set use wrong global id"
href="https://bugs.llvm.org/show_bug.cgi?id=32771">bug 32771</a>
from <span class="vcard"><a class="email" href="mailto:dan433584@gmail.com" title="Dan Gohman <dan433584@gmail.com>"> <span class="fn">Dan Gohman</span></a>
</span></b>
<pre>This is now fixed; running llc on the input file produces a wasm module that
imports the stack pointer as global 0, but even with a testcase that imports it
as a non-zero index, stack pointer references now use the correct index.
For example, this C code:
extern int xyz;
extern int uvw;
int* return_xyz(void) { return &xyz; }
int* return_uvw(void) { return &uvw; }
void callee(int*);
void qux(void) { int i; callee(&i); }
compiled to a .o file which wasm2wat translates to this:
(module
(type (;0;) (func (result i32)))
(type (;1;) (func))
(type (;2;) (func (param i32)))
(import "env" "xyz" (global (;0;) i32))
(import "env" "uvw" (global (;1;) i32))
(import "env" "__stack_pointer" (global (;2;) i32))
(import "env" "callee" (func $callee (type 2)))
(func $return_xyz (type 0) (result i32)
i32.const -1)
(func $return_uvw (type 0) (result i32)
i32.const -1)
(func $qux (type 1)
(local i32)
get_global 2
i32.const 16
i32.sub
tee_local 0
set_global 2
get_local 0
i32.const 12
i32.add
call $callee
get_local 0
i32.const 16
i32.add
set_global 2)
(table (;0;) 0 anyfunc)
(memory (;0;) 0)
(export "return_xyz" (func $return_xyz))
(export "return_uvw" (func $return_uvw))
(export "qux" (func $qux)))</pre>
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