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support older llvm versions

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This commit is contained in:
van Hauser
2020-05-05 14:08:24 +02:00
parent 9d384b4e38
commit d82ada89fe
1 changed files with 25 additions and 17 deletions
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42
llvm_mode/compare-transform-pass.so.cc
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@ -211,20 +211,24 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp,
} }
// not literal? maybe global or local variable // not literal? maybe global or local variable
if (!(HasStr1 ^ HasStr2)) { if (!(HasStr1 || HasStr2)) {
auto *Ptr = dyn_cast<ConstantExpr>(Str2P); auto *Ptr = dyn_cast<ConstantExpr>(Str2P);
if (Ptr && Ptr->isGEPWithNoNotionalOverIndexing()) { if (Ptr && Ptr->isGEPWithNoNotionalOverIndexing()) {
if (auto *Var = dyn_cast<GlobalVariable>(Ptr->getOperand(0))) { if (auto *Var = dyn_cast<GlobalVariable>(Ptr->getOperand(0))) {
if (auto *Array = if (Var->hasInitializer()) {
dyn_cast<ConstantDataArray>(Var->getInitializer())) {
HasStr2 = true; if (auto *Array =
Str2 = Array->getAsString(); dyn_cast<ConstantDataArray>(Var->getInitializer())) {
valueMap[Str2P] = new std::string(Str2.str());
// fprintf(stderr, "glo2 %s\n", Str2.str().c_str()); HasStr2 = true;
Str2 = Array->getAsString();
valueMap[Str2P] = new std::string(Str2.str());
fprintf(stderr, "glo2 %s\n", Str2.str().c_str());
}
} }
@ -239,13 +243,17 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp,
if (auto *Var = dyn_cast<GlobalVariable>(Ptr->getOperand(0))) { if (auto *Var = dyn_cast<GlobalVariable>(Ptr->getOperand(0))) {
if (auto *Array = if (Var->hasInitializer()) {
dyn_cast<ConstantDataArray>(Var->getInitializer())) {
HasStr1 = true; if (auto *Array = dyn_cast<ConstantDataArray>(
Str1 = Array->getAsString(); Var->getInitializer())) {
valueMap[Str1P] = new std::string(Str1.str());
// fprintf(stderr, "glo1 %s\n", Str1.str().c_str()); HasStr1 = true;
Str1 = Array->getAsString();
valueMap[Str1P] = new std::string(Str1.str());
// fprintf(stderr, "glo1 %s\n", Str1.str().c_str());
}
} }
@ -260,13 +268,13 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp,
} }
if ((HasStr1 ^ HasStr2)) indirect = true; if ((HasStr1 || HasStr2)) indirect = true;
} }
if (isIntMemcpy) continue; if (isIntMemcpy) continue;
if (!(HasStr1 ^ HasStr2)) { if (!(HasStr1 || HasStr2)) {
// do we have a saved local variable initialization? // do we have a saved local variable initialization?
std::string *val = valueMap[Str1P]; std::string *val = valueMap[Str1P];
@ -294,7 +302,7 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp,
} }
/* handle cases of one string is const, one string is variable */ /* handle cases of one string is const, one string is variable */
if (!(HasStr1 ^ HasStr2)) continue; if (!(HasStr1 || HasStr2)) continue;
if (isMemcmp || isStrncmp || isStrncasecmp) { if (isMemcmp || isStrncmp || isStrncasecmp) {
@ -359,7 +367,7 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp,
} }
if (!(HasStr1 ^ HasStr2)) { if (!(HasStr1 || HasStr2)) {
// do we have a saved local or global variable initialization? // do we have a saved local or global variable initialization?
std::string *val = valueMap[Str1P]; std::string *val = valueMap[Str1P];