RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 19:23:23 +01:00
Code Issues Projects Releases Wiki Activity

[CGP] Fix GEP issue with out of range APInt constant values not fitting in int64_t

Browse Source 
Test case reduced from https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7173

llvm-svn: 339556
This commit is contained in:
Simon Pilgrim 2018-08-13 12:10:09 +00:00
parent e84b02f47e
commit 2b765f36a3
2 changed files with 18 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
lib/CodeGen/CodeGenPrepare.cpp
View File

@ -3801,8 +3801,13 @@ bool AddressingModeMatcher::matchOperationAddr(User *AddrInst, unsigned Opcode,
} else {
uint64_t TypeSize = DL.getTypeAllocSize(GTI.getIndexedType());
if (ConstantInt *CI = dyn_cast<ConstantInt>(AddrInst->getOperand(i))) {
ConstantOffset += CI->getSExtValue() * TypeSize;
} else if (TypeSize) { // Scales of zero don't do anything.
const APInt &CVal = CI->getValue();
if (CVal.getMinSignedBits() <= 64) {
ConstantOffset += CVal.getSExtValue() * TypeSize;
continue;
}
}
if (TypeSize) { // Scales of zero don't do anything.
// We only allow one variable index at the moment.
if (VariableOperand != -1)
return false;

11
test/CodeGen/X86/getelementptr.ll
View File

@ -78,3 +78,14 @@ define i8* @test_sext16(i8* %ptr) nounwind {
%d = getelementptr i8, i8* %ptr, i8 -21
ret i8* %d
}
; Test out of int64_t range indices
; OSS-Fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7173
define void @test_outofrange(i96* %ptr) nounwind {
; CHECK-LABEL: test_outofrange
%d = getelementptr i96, i96* %ptr, i96 39614081257132168796771975167
%ld = load i96, i96* %d, align 1
unreachable
}