RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-12-08 12:08:46 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fix PR1782, patch by Wojtek Matyjewicz!

Browse Source 
llvm-svn: 44733
This commit is contained in:
Chris Lattner 2007-12-09 07:35:13 +00:00
parent 3d1a3ce823
commit 95f9743c43
2 changed files with 35 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/Analysis/BasicAliasAnalysis.cpp
View File

@ -730,8 +730,8 @@ BasicAliasAnalysis::CheckGEPInstructions(
if (const ArrayType *AT = dyn_cast<ArrayType>(BasePtr1Ty)) {
if (Op1C->getZExtValue() >= AT->getNumElements())
return MayAlias; // Be conservative with out-of-range accesses
} else if (const VectorType *PT = dyn_cast<VectorType>(BasePtr1Ty)) {
if (Op1C->getZExtValue() >= PT->getNumElements())
} else if (const VectorType *VT = dyn_cast<VectorType>(BasePtr1Ty)) {
if (Op1C->getZExtValue() >= VT->getNumElements())
return MayAlias; // Be conservative with out-of-range accesses
}
@ -756,10 +756,10 @@ BasicAliasAnalysis::CheckGEPInstructions(
if (Op2) {
if (const ConstantInt *Op2C = dyn_cast<ConstantInt>(Op2)) {
// If this is an array index, make sure the array element is in range.
if (const ArrayType *AT = dyn_cast<ArrayType>(BasePtr1Ty)) {
if (const ArrayType *AT = dyn_cast<ArrayType>(BasePtr2Ty)) {
if (Op2C->getZExtValue() >= AT->getNumElements())
return MayAlias; // Be conservative with out-of-range accesses
} else if (const VectorType *VT = dyn_cast<VectorType>(BasePtr1Ty)) {
} else if (const VectorType *VT = dyn_cast<VectorType>(BasePtr2Ty)) {
if (Op2C->getZExtValue() >= VT->getNumElements())
return MayAlias; // Be conservative with out-of-range accesses
}

31
test/Analysis/BasicAA/2007-12-08-OutOfBoundsCrash.ll Normal file
View File

@ -0,0 +1,31 @@
; RUN: llvm-as < %s | opt -gvn -disable-output
; PR1782
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
target triple = "x86_64-unknown-linux-gnu"
%struct.device = type { [20 x i8] }
%struct.pci_device_id = type { i32, i32, i32, i32, i32, i32, i64 }
%struct.usb_bus = type { %struct.device* }
%struct.usb_hcd = type { %struct.usb_bus, [0 x i64] }
@pci_ids = external constant [1 x %struct.pci_device_id] ; <[1 x %struct.pci_device_id]*> [#uses=1]
@__mod_pci_device_table = alias [1 x %struct.pci_device_id]* @pci_ids ; <[1 x %struct.pci_device_id]*> [#uses=0]
define i32 @ehci_pci_setup(%struct.usb_hcd* %hcd) {
entry:
%tmp14 = getelementptr %struct.usb_hcd* %hcd, i32 0, i32 0, i32 0 ; <%struct.device**> [#uses=1]
%tmp15 = load %struct.device** %tmp14, align 8 ; <%struct.device*> [#uses=0]
br i1 false, label %bb25, label %return
bb25: ; preds = %entry
br i1 false, label %cond_true, label %return
cond_true: ; preds = %bb25
%tmp601 = getelementptr %struct.usb_hcd* %hcd, i32 0, i32 1, i64 2305843009213693951 ; <i64*> [#uses=1]
%tmp67 = bitcast i64* %tmp601 to %struct.device** ; <%struct.device**> [#uses=1]
%tmp68 = load %struct.device** %tmp67, align 8 ; <%struct.device*> [#uses=0]
ret i32 undef
return: ; preds = %bb25, %entry
ret i32 undef
}