http://llvm.org/bugs/show_bug.cgi?id=2596
Summary: valgrind error in VirtRegMap.cpp
Product: libraries
Version: trunk
Platform: All
OS/Version: All
Status: NEW
Keywords: compile-fail
Severity: normal
Priority: P2
Component: Common Code Generator Code
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [email protected]
Created an attachment (id=1863)
--> (http://llvm.org/bugs/attachment.cgi?id=1863)
reduced testcase
valgrind turned up an out-of-bounds access in VirtRegMap.cpp.
The following assert demonstrates it, with the attached testcase
Compile with llc -march=x86.
--- lib/CodeGen/VirtRegMap.cpp
+++ lib/CodeGen/VirtRegMap.cpp
@@ -562,6 +562,7 @@ static void InvalidateKills(MachineInstr &MI,
BitVector &RegKills,
unsigned Reg = MO.getReg();
if (KillRegs)
KillRegs->push_back(Reg);
+ assert(Reg < KillOps.size());
if (KillOps[Reg] == &MO) {
RegKills.reset(Reg);
KillOps[Reg] = NULL;
--
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