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Fix undefined behavior in the Mips backend.

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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
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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;

10
lib/Target/Mips/MipsAnalyzeImmediate.h
View File

@ -25,7 +25,7 @@ namespace llvm {
/// Analyze - Get an instrucion sequence to load immediate Imm. The last
/// instruction in the sequence must be an ADDiu if LastInstrIsADDiu is
/// true;
const InstSeq &Analyze(int64_t Imm, unsigned Size, bool LastInstrIsADDiu);
const InstSeq &Analyze(uint64_t Imm, unsigned Size, bool LastInstrIsADDiu);
private:
typedef SmallVector<InstSeq, 5> InstSeqLs;
@ -34,18 +34,18 @@ namespace llvm {
/// GetInstSeqLsADDiu - Get instrucion sequences which end with an ADDiu to
/// load immediate Imm
void GetInstSeqLsADDiu(int64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
void GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
/// GetInstSeqLsORi - Get instrucion sequences which end with an ORi to
/// load immediate Imm
void GetInstSeqLsORi(int64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
void GetInstSeqLsORi(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
/// GetInstSeqLsSLL - Get instrucion sequences which end with a SLL to
/// load immediate Imm
void GetInstSeqLsSLL(int64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
void GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
/// GetInstSeqLs - Get instrucion sequences to load immediate Imm.
void GetInstSeqLs(int64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
void GetInstSeqLs(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
/// ReplaceADDiuSLLWithLUi - Replace an ADDiu & SLL pair with a LUi.
void ReplaceADDiuSLLWithLUi(InstSeq &Seq);