<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - WebAssembly pops a value multiple times"
href="https://llvm.org/bugs/show_bug.cgi?id=25938">25938</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>WebAssembly pops a value multiple times
</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>Linux
</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>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>alonzakai@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>A gcc torture test, 930930-1.c, ends up as
----
.text
.file
"/b/build/slave/linux/build/src/buildbot/work/gcc/gcc/testsuite/gcc.c-torture/execute/930930-1.c"
.globl f
.type f,@function
f: # @f
.param i32, i32, i32, i32, i32
.result i32
.local i32, i32
# BB#0: # %entry
i32.lt_u $push1=, $3, $4
copy_local $6=, $0
block BB0_7
br_if $pop1, BB0_7
BB0_1: # %if.end
# =>This Inner Loop Header: Depth=1
loop BB0_5
i32.load $push0=, 0($3)
i32.ge_u $push2=, $pop0, $2
block BB0_4
br_if $pop2, BB0_4
# BB#2: # %if.end
# in Loop: Header=BB0_1 Depth=1
i32.lt_u $push3=, $pop0, $1
br_if $pop3, BB0_4
# BB#3: # %if.then3
# in Loop: Header=BB0_1 Depth=1
i32.const $5=, -4
i32.add $6=, $6, $5
i32.store $discard=, 0($6), $pop0
BB0_4: # %if.end4
# in Loop: Header=BB0_1 Depth=1
i32.const $push4=, -4
i32.add $3=, $3, $pop4
i32.ge_u $push5=, $3, $4
br_if $pop5, BB0_1
BB0_5: # %out
i32.eq $push6=, $6, $0
br_if $pop6, BB0_7
# BB#6: # %if.then7
call abort
unreachable
BB0_7: # %if.end8
return $3
func_end0:
.size f, func_end0-f
.globl main
.type main,@function
main: # @main
.result i32
.local i32
# BB#0: # %f.exit
i32.const $0=, 0
i32.const $push0=, mem
i32.store $discard=, mem+396($0), $pop0
call exit, $0
unreachable
func_end1:
.size main, func_end1-main
.type mem,@object # @mem
.bss
.globl mem
.align 4
mem:
.zero 400
.size mem, 400
.type wm_TR,@object # @wm_TR
.globl wm_TR
.align 2
wm_TR:
.int32 0
.size wm_TR, 4
.type wm_HB,@object # @wm_HB
.globl wm_HB
.align 2
wm_HB:
.int32 0
.size wm_HB, 4
.type wm_SPB,@object # @wm_SPB
.globl wm_SPB
.align 2
wm_SPB:
.int32 0
.size wm_SPB, 4
.ident "clang version 3.8.0 "
.section ".note.GNU-stack","",@progbits
----
Note the multiple $pop0.</pre>
</div>
</p>
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