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<body><span class="vcard"><a class="email" href="mailto:gberry@codeaurora.org" title="Geoff Berry <gberry@codeaurora.org>"> <span class="fn">Geoff Berry</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Assertion in VirtRegRewriter: `toIndex_(n) < storage_.size() && "index out of bounds!"'"
href="https://bugs.llvm.org/show_bug.cgi?id=34828">bug 34828</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Assertion in VirtRegRewriter: `toIndex_(n) < storage_.size() && "index out of bounds!"'"
href="https://bugs.llvm.org/show_bug.cgi?id=34828#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Assertion in VirtRegRewriter: `toIndex_(n) < storage_.size() && "index out of bounds!"'"
href="https://bugs.llvm.org/show_bug.cgi?id=34828">bug 34828</a>
from <span class="vcard"><a class="email" href="mailto:gberry@codeaurora.org" title="Geoff Berry <gberry@codeaurora.org>"> <span class="fn">Geoff Berry</span></a>
</span></b>
<pre>This bug should be fixed by the change below, which will be present when this
change is re-enabled:
--- a/lib/CodeGen/MachineCopyPropagation.cpp
+++ b/lib/CodeGen/MachineCopyPropagation.cpp
@@ -102,7 +102,7 @@ using Reg2MIMap = DenseMap<unsigned, MachineInstr *>;
MachineFunction *MF;
SlotIndexes *Indexes;
LiveIntervals *LIS;
- const VirtRegMap *VRM;
+ VirtRegMap *VRM;
// True if this pass being run before virtual registers are remapped to
// physical ones.
bool PreRegRewrite;
@@ -173,6 +173,7 @@ using Reg2MIMap = DenseMap<unsigned, MachineInstr *>;
unsigned NewUseSubReg);
/// LiveRangeEdit callback for eliminateDeadDefs().
void LRE_WillEraseInstruction(MachineInstr *MI) override;
+ void LRE_DidCloneVirtReg(unsigned NewReg, unsigned OrigReg) override;
/// Candidates for deletion.
SmallSetVector<MachineInstr*, 8> MaybeDeadCopies;
@@ -603,6 +604,20 @@ void
MachineCopyPropagation::LRE_WillEraseInstruction(MachineInstr *MI) {
Changed = true;
}
+/// Update VRM when new registers are added by
LiveRangeEdit::eliminateDeadDefs.
+void MachineCopyPropagation::LRE_DidCloneVirtReg(unsigned NewReg,
+ unsigned OrigReg) {
+
+ DEBUG(dbgs() << "MCP: Assigning split reg " << PrintReg(NewReg, TRI) << "\n"
+ << " based on original reg " << PrintReg(OrigReg, TRI) << "\n");
+
+ VRM->grow();
+ VRM->assignVirt2Phys(NewReg, VRM->getPhys(OrigReg));
+
+ DEBUG(dbgs() << " to phys reg " << PrintReg(VRM->getPhys(NewReg), TRI)
+ << "\n");
+}
+
/// Look for available copies whose destination register is used by \p MI and
/// replace the use in \p MI with the copy's source register.
void MachineCopyPropagation::forwardUses(MachineInstr &MI) {</pre>
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