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workaroung for llvm LTO bitcast bug

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This commit is contained in:
vanhauser-thc 2021-02-04 18:57:27 +01:00
parent 208254f47c
commit ec737f3368
1 changed files with 2 additions and 21 deletions
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23
instrumentation/cmplog-instructions-pass.cc
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@ -265,7 +265,7 @@ bool CmpLogInstructions::hookInstrs(Module &M) {
unsigned int max_size = Val->getType()->getIntegerBitWidth(), cast_size; unsigned int max_size = Val->getType()->getIntegerBitWidth(), cast_size;
unsigned char do_cast = 0; unsigned char do_cast = 0;
if (!SI->getNumCases() || max_size <= 8) { if (!SI->getNumCases() || max_size < 16 || max_size % 8) {
// if (!be_quiet) errs() << "skip trivial switch..\n"; // if (!be_quiet) errs() << "skip trivial switch..\n";
continue; continue;
@ -275,17 +275,6 @@ bool CmpLogInstructions::hookInstrs(Module &M) {
IRBuilder<> IRB(SI->getParent()); IRBuilder<> IRB(SI->getParent());
IRB.SetInsertPoint(SI); IRB.SetInsertPoint(SI);
if (max_size % 8) {
// bitcast from i6 to i8 panics llvm, so ...
continue;
/*
max_size = (((max_size / 8) + 1) * 8);
do_cast = 1;
*/
}
if (max_size > 128) { if (max_size > 128) {
if (!be_quiet) { if (!be_quiet) {
@ -551,15 +540,7 @@ bool CmpLogInstructions::hookInstrs(Module &M) {
} }
if (!max_size) { continue; } if (!max_size || max_size % 8 || max_size < 16) { continue; }
// _ExtInt() with non-8th values
if (max_size % 8) {
max_size = (((max_size / 8) + 1) * 8);
do_cast = 1;
}
if (max_size > 128) { if (max_size > 128) {