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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 - [MIR] Bad MF Property with -start-before=codegenprepare"
href="https://bugs.llvm.org/show_bug.cgi?id=40743">40743</a>
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<th>Summary</th>
<td>[MIR] Bad MF Property with -start-before=codegenprepare
</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>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<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>paulsson@linux.vnet.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<pre>The llc input file is under test/CodeGen/SystemZ/
This works fine:
llc -mtriple=s390x-linux-gnu -mcpu=z10 fp-conv-18.ll -o - -verify-machineinstrs
But this results in an error:
llc -mtriple=s390x-linux-gnu -mcpu=z10 fp-conv-18.ll -o tc.mir
-stop-before=codegenprepare
llc -mtriple=s390x-linux-gnu -mcpu=z10 tc.mir -o - -verify-machineinstrs
-start-before=codegenprepare
# After Instruction Selection
# Machine code for function fun1: IsSSA, NoPHIs, TracksLiveness, NoVRegs
bb.0.bb:
%1:addr64bit = IMPLICIT_DEF
%0:fp64bit = LDEB killed %1:addr64bit, 0, $noreg :: (load 4 from `<4 x
float>* undef` + 12, align 16)
%2:gr64bit = LARL @.str
$r2d = COPY %2:gr64bit
$f0d = COPY %0:fp64bit
%3:fp64bit = IMPLICIT_DEF
$f2d = COPY %3:fp64bit
$f4d = COPY %0:fp64bit
%4:fp64bit = IMPLICIT_DEF
$f6d = COPY %4:fp64bit
CallJG @printf, <regmask $f8d $f9d $f10d $f11d $f12d $f13d $f14d $f15d $f8q
$f9q $f12q $f13q $f8s $f9s $f10s $f11s $f12s $f13s $f14s $f15s $r6d $r7d $r8d
$r9d $r10d $r11d $r12d $r13d $r14d $r15d $r6h $r7h $r8h and 22 more...>,
implicit $r2d, implicit $f0d, implicit $f2d, implicit $f4d, implicit $f6d
# End machine code for function fun1.
*** Bad machine code: Function has NoVRegs property but there are VReg operands
***
- function: fun1
LLVM ERROR: Found 1 machine code errors.</pre>
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