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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - vectorized code produces wrong result after r307036"
href="https://bugs.llvm.org/show_bug.cgi?id=34919">34919</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>vectorized code produces wrong result after r307036
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>GlobalISel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>wmi@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, zvi.rackover@intel.com
</td>
</tr></table>
<p>
<div>
<pre>----------------------- 1.ll ------------------------------
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare i32 @printf(i8* nocapture readonly, ...) local_unnamed_addr
@.str = private unnamed_addr constant [4 x i8] c"%f\0A\00", align 1
define float @foo(<4 x i1> %t423, <4 x float> %t380) {
%t424 = select <4 x i1> %t423, <4 x float> zeroinitializer, <4 x float> %t380
%t427 = extractelement <4 x i1> %t423, i32 0
%t429 = extractelement <4 x i1> %t423, i32 1
%t431 = extractelement <4 x i1> %t423, i32 2
%t438 = extractelement <4 x i1> %t423, i32 3
%t428 = extractelement <4 x float> %t380, i32 0
%t432 = extractelement <4 x float> %t380, i32 2
%t433 = insertelement <2 x i1> undef, i1 %t427, i32 0
%t434 = insertelement <2 x i1> %t433, i1 %t431, i32 1
%t435 = insertelement <2 x float> undef, float %t428, i32 0
%t436 = insertelement <2 x float> %t435, float %t432, i32 1
%t437 = select <2 x i1> %t434, <2 x float> zeroinitializer, <2 x float> %t436
%t454 = extractelement <4 x float> %t424, i32 2
%t455 = extractelement <2 x float> %t437, i32 1
%t456 = fsub float %t455, %t454
ret float %t456
}
define void @main() {
%ret = call float @foo(<4 x i1> <i1 1, i1 0, i1 1, i1 1>, <4 x float> <float
1.000000e+00, float 2.000000e+00, float 3.000000e+00, float 4.000000e+00>)
%conv = fpext float %ret to double
%call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x
i8], [4 x i8]* @.str, i64 0, i64 0), double %conv)
ret void
}
----------------------------------------------------------------------
~/workarea/llvm-r307035/dbuild/bin/llc -O0 -relocation-model=pic < 1.ll > 1.s
gcc 1.s -o a.out
./a.out
0.000000
~/workarea/llvm-r307036/dbuild/bin/llc -O0 -relocation-model=pic < 1.ll > 1.s
gcc 1.s -o a.out
./a.out
3.000000</pre>
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