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Teach local register allocator to deal with landing pad MBB's. 

llvm-svn: 51647
This commit is contained in:
Evan Cheng 2008-05-28 17:22:32 +00:00
parent 34873d2134
commit 427412e7c8
2 changed files with 34 additions and 4 deletions
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8
llvm/lib/CodeGen/RegAllocLocal.cpp
View File

@ -549,10 +549,10 @@ void RALocal::AllocateBasicBlock(MachineBasicBlock &MBB) {
// If this is the first basic block in the machine function, add live-in
// registers as active.
if (&MBB == &*MF->begin()) {
for (MachineRegisterInfo::livein_iterator I=MF->getRegInfo().livein_begin(),
E = MF->getRegInfo().livein_end(); I != E; ++I) {
unsigned Reg = I->first;
if (&MBB == &*MF->begin() || MBB.isLandingPad()) {
for (MachineBasicBlock::livein_iterator I = MBB.livein_begin(),
E = MBB.livein_end(); I != E; ++I) {
unsigned Reg = *I;
MF->getRegInfo().setPhysRegUsed(Reg);
PhysRegsUsed[Reg] = 0; // It is free and reserved now
AddToPhysRegsUseOrder(Reg);

30
llvm/test/CodeGen/X86/2008-05-28-LocalRegAllocBug.ll Normal file
View File

@ -0,0 +1,30 @@
; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin -regalloc=local
@_ZTVN10Evaluation10GridOutputILi3EEE = external constant [5 x i32 (...)*] ; <[5 x i32 (...)*]*> [#uses=1]
declare i8* @llvm.eh.exception() nounwind
declare i8* @_Znwm(i32)
declare i8* @__cxa_begin_catch(i8*) nounwind
define i32 @main(i32 %argc, i8** %argv) {
entry:
br i1 false, label %bb37, label %bb34
bb34: ; preds = %entry
ret i32 1
bb37: ; preds = %entry
%tmp12.i.i.i.i.i66 = invoke i8* @_Znwm( i32 12 )
to label %tmp12.i.i.i.i.i.noexc65 unwind label %lpad243 ; <i8*> [#uses=0]
tmp12.i.i.i.i.i.noexc65: ; preds = %bb37
unreachable
lpad243: ; preds = %bb37
%eh_ptr244 = call i8* @llvm.eh.exception( ) ; <i8*> [#uses=1]
store i32 (...)** getelementptr ([5 x i32 (...)*]* @_ZTVN10Evaluation10GridOutputILi3EEE, i32 0, i32 2), i32 (...)*** null, align 8
%tmp133 = call i8* @__cxa_begin_catch( i8* %eh_ptr244 ) nounwind ; <i8*> [#uses=0]
unreachable
}