[llvm-commits] [llvm] r51647 - in /llvm/trunk: lib/CodeGen/RegAllocLocal.cpp test/CodeGen/X86/2008-05-28-LocalRegAllocBug.ll

[Evan Cheng]

Author: evancheng
Date: Wed May 28 12:22:32 2008
New Revision: 51647

URL: http://llvm.org/viewvc/llvm-project?rev=51647&view=rev
Log:
Teach local register allocator to deal with landing pad MBB's.

Added:
    llvm/trunk/test/CodeGen/X86/2008-05-28-LocalRegAllocBug.ll
Modified:
    llvm/trunk/lib/CodeGen/RegAllocLocal.cpp

Modified: llvm/trunk/lib/CodeGen/RegAllocLocal.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/RegAllocLocal.cpp?rev=51647&r1=51646&r2=51647&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/RegAllocLocal.cpp (original)
+++ llvm/trunk/lib/CodeGen/RegAllocLocal.cpp Wed May 28 12:22:32 2008
@@ -549,10 +549,10 @@
 
   // 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); 

Added: llvm/trunk/test/CodeGen/X86/2008-05-28-LocalRegAllocBug.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/2008-05-28-LocalRegAllocBug.ll?rev=51647&view=auto

==============================================================================
--- llvm/trunk/test/CodeGen/X86/2008-05-28-LocalRegAllocBug.ll (added)
+++ llvm/trunk/test/CodeGen/X86/2008-05-28-LocalRegAllocBug.ll Wed May 28 12:22:32 2008
@@ -0,0 +1,30 @@
+; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin -regalloc=local
+
+ at _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
+}