6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-26 12:20:42 +00:00
Code Issues Projects Releases Wiki Activity

Add some convenience methods for querying attributes, and

Browse Source 
use them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44403 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2007-11-28 17:07:01 +00:00
parent 1e7b1bbd9c
commit afa3b6da11
15 changed files with 81 additions and 88 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/Transforms/Scalar/SimplifyCFG.cpp
+2 -31
View File
@@ -90,35 +90,6 @@ static void ChangeToCall(InvokeInst *II) {
BB->getInstList().erase(II);
}
/// IsNoReturn - Return true if the specified call is to a no-return function.
static bool IsNoReturn(const CallInst *CI) {
if (const ParamAttrsList *Attrs = CI->getParamAttrs())
if (Attrs->paramHasAttr(0, ParamAttr::NoReturn))
return true;
if (const Function *Callee = CI->getCalledFunction())
if (const ParamAttrsList *Attrs = Callee->getParamAttrs())
if (Attrs->paramHasAttr(0, ParamAttr::NoReturn))
return true;
return false;
}
/// IsNoUnwind - Return true if the specified invoke is to a no-unwind function.
static bool IsNoUnwind(const InvokeInst *II) {
if (const ParamAttrsList *Attrs = II->getParamAttrs())
if (Attrs->paramHasAttr(0, ParamAttr::NoUnwind))
return true;
if (const Function *Callee = II->getCalledFunction())
if (const ParamAttrsList *Attrs = Callee->getParamAttrs())
if (Attrs->paramHasAttr(0, ParamAttr::NoUnwind))
return true;
return false;
}
static bool MarkAliveBlocks(BasicBlock *BB,
SmallPtrSet<BasicBlock*, 128> &Reachable) {
@@ -137,7 +108,7 @@ static bool MarkAliveBlocks(BasicBlock *BB,
// canonicalizes unreachable insts into stores to null or undef.
for (BasicBlock::iterator BBI = BB->begin(), E = BB->end(); BBI != E;++BBI){
if (CallInst *CI = dyn_cast<CallInst>(BBI)) {
if (IsNoReturn(CI)) {
if (CI->paramHasAttr(0, ParamAttr::NoReturn)) {
// If we found a call to a no-return function, insert an unreachable
// instruction after it. Make sure there isn't *already* one there
// though.
@@ -161,7 +132,7 @@ static bool MarkAliveBlocks(BasicBlock *BB,
// Turn invokes that call 'nounwind' functions into ordinary calls.
if (InvokeInst *II = dyn_cast<InvokeInst>(BB->getTerminator()))
if (IsNoUnwind(II)) {
if (II->paramHasAttr(0, ParamAttr::NoUnwind)) {
ChangeToCall(II);
Changed = true;
}