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Fix PR2596: out of bound reference.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54375 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-08-05 21:51:46 +00:00
parent 5d2f8072d4
commit e3b8a48d32
2 changed files with 48 additions and 3 deletions
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11
lib/CodeGen/VirtRegMap.cpp
View File

@ -560,8 +560,11 @@ static void InvalidateKills(MachineInstr &MI, BitVector &RegKills,
if (!MO.isRegister() || !MO.isUse() || !MO.isKill())
continue;
unsigned Reg = MO.getReg();
if (TargetRegisterInfo::isVirtualRegister(Reg))
continue;
if (KillRegs)
KillRegs->push_back(Reg);
assert(Reg < KillOps.size());
if (KillOps[Reg] == &MO) {
RegKills.reset(Reg);
KillOps[Reg] = NULL;
@ -943,9 +946,11 @@ bool LocalSpiller::PrepForUnfoldOpti(MachineBasicBlock &MBB,
return false;
continue;
}
PhysReg = VRM.getPhys(VirtReg);
if (!TRI->regsOverlap(PhysReg, UnfoldPR))
continue;
if (VRM.hasPhys(VirtReg)) {
PhysReg = VRM.getPhys(VirtReg);
if (!TRI->regsOverlap(PhysReg, UnfoldPR))
continue;
}
// Ok, we'll need to reload the value into a register which makes
// it impossible to perform the store unfolding optimization later.

40
test/CodeGen/X86/2008-08-06-RewriterBug.ll Normal file
View File

@ -0,0 +1,40 @@
; RUN: llvm-as < %s | llc -march=x86
; PR2596
@data = external global [400 x i64] ; <[400 x i64]*> [#uses=5]
define void @foo(double* noalias, double* noalias) {
load i64* getelementptr ([400 x i64]* @data, i32 0, i64 200), align 4 ; <i64>:3 [#uses=1]
load i64* getelementptr ([400 x i64]* @data, i32 0, i64 199), align 4 ; <i64>:4 [#uses=1]
load i64* getelementptr ([400 x i64]* @data, i32 0, i64 198), align 4 ; <i64>:5 [#uses=2]
load i64* getelementptr ([400 x i64]* @data, i32 0, i64 197), align 4 ; <i64>:6 [#uses=1]
br i1 false, label %28, label %7
; <label>:7 ; preds = %2
load double** getelementptr (double** bitcast ([400 x i64]* @data to double**), i64 180), align 8 ; <double*>:8 [#uses=1]
bitcast double* %8 to double* ; <double*>:9 [#uses=1]
ptrtoint double* %9 to i64 ; <i64>:10 [#uses=1]
mul i64 %4, %3 ; <i64>:11 [#uses=1]
add i64 0, %11 ; <i64>:12 [#uses=1]
shl i64 %12, 3 ; <i64>:13 [#uses=1]
sub i64 %10, %13 ; <i64>:14 [#uses=1]
add i64 %5, 0 ; <i64>:15 [#uses=1]
shl i64 %15, 3 ; <i64>:16 [#uses=1]
bitcast i64 %16 to i64 ; <i64>:17 [#uses=1]
mul i64 %6, %5 ; <i64>:18 [#uses=1]
add i64 0, %18 ; <i64>:19 [#uses=1]
shl i64 %19, 3 ; <i64>:20 [#uses=1]
sub i64 %17, %20 ; <i64>:21 [#uses=1]
add i64 0, %21 ; <i64>:22 [#uses=1]
add i64 0, %14 ; <i64>:23 [#uses=1]
br label %24
; <label>:24 ; preds = %24, %7
phi i64 [ 0, %24 ], [ %22, %7 ] ; <i64>:25 [#uses=1]
phi i64 [ 0, %24 ], [ %23, %7 ] ; <i64>:26 [#uses=0]
add i64 %25, 24 ; <i64>:27 [#uses=0]
br label %24
; <label>:28 ; preds = %2
unreachable
}