6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-25 16:24:23 +00:00
Code Issues Projects Releases Wiki Activity

Fix undefined behavior in the Mips backend.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152390 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ahmed Charles
2012-03-09 06:36:45 +00:00
parent 68675c6c5b
commit e38ec24758
2 changed files with 15 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
lib/Target/Mips/MipsAnalyzeImmediate.cpp
View File

@ -26,28 +26,28 @@ void MipsAnalyzeImmediate::AddInstr(InstSeqLs &SeqLs, const Inst &I) {
Iter->push_back(I);
}
void MipsAnalyzeImmediate::GetInstSeqLsADDiu(int64_t Imm, unsigned RemSize,
void MipsAnalyzeImmediate::GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize,
InstSeqLs &SeqLs) {
GetInstSeqLs((Imm + 0x8000) & ~0xffff, RemSize, SeqLs);
AddInstr(SeqLs, Inst(ADDiu, Imm & 0xffff));
GetInstSeqLs((Imm + 0x8000ULL) & 0xffffffffffff0000ULL, RemSize, SeqLs);
AddInstr(SeqLs, Inst(ADDiu, Imm & 0xffffULL));
}
void MipsAnalyzeImmediate::GetInstSeqLsORi(int64_t Imm, unsigned RemSize,
void MipsAnalyzeImmediate::GetInstSeqLsORi(uint64_t Imm, unsigned RemSize,
InstSeqLs &SeqLs) {
GetInstSeqLs(Imm & ~0xffff, RemSize, SeqLs);
AddInstr(SeqLs, Inst(ORi, Imm & 0xffff));
GetInstSeqLs(Imm & 0xffffffffffff0000ULL, RemSize, SeqLs);
AddInstr(SeqLs, Inst(ORi, Imm & 0xffffULL));
}
void MipsAnalyzeImmediate::GetInstSeqLsSLL(int64_t Imm, unsigned RemSize,
void MipsAnalyzeImmediate::GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize,
InstSeqLs &SeqLs) {
unsigned Shamt = CountTrailingZeros_64(Imm);
GetInstSeqLs(Imm >> Shamt, RemSize - Shamt, SeqLs);
AddInstr(SeqLs, Inst(SLL, Shamt));
}
void MipsAnalyzeImmediate::GetInstSeqLs(int64_t Imm, unsigned RemSize,
void MipsAnalyzeImmediate::GetInstSeqLs(uint64_t Imm, unsigned RemSize,
InstSeqLs &SeqLs) {
int64_t MaskedImm = Imm & (((uint64_t)-1) >> (64 - Size));
uint64_t MaskedImm = Imm & (0xffffffffffffffffULL >> (64 - Size));
// Do nothing if Imm is 0.
if (!MaskedImm)
@ -122,7 +122,7 @@ void MipsAnalyzeImmediate::GetShortestSeq(InstSeqLs &SeqLs, InstSeq &Insts) {
}
const MipsAnalyzeImmediate::InstSeq
&MipsAnalyzeImmediate::Analyze(int64_t Imm, unsigned Size,
&MipsAnalyzeImmediate::Analyze(uint64_t Imm, unsigned Size,
bool LastInstrIsADDiu) {
this->Size = Size;