;; Date: May 28, 2003. ;; From: test/Programs/SingleSource/richards_benchmark.c ;; Function: struct task *handlerfn(struct packet *pkt) ;; ;; Error: PreSelection puts the arguments of the Phi just before ;; the Phi instead of in predecessor blocks. This later ;; causes llc to produces an invalid register <NULL VALUE> ;; for the phi arguments. ;; ;; PreSelection Output: ;; *** LLVM code after pre-selection for function handlerfn: ;; ;; ;; %struct..task* %handlerfn(%struct..packet*) { ;; ; <label>:0 ; No predecessors! ;; setne %struct..packet* %0, null ; <bool>:0 [#uses=1] ;; br bool %0, label %1, label %2 ;; ;; ; <label>:1 ; preds = %0 ;; br label %2 ;; ;; ; <label>:2 ; preds = %0, %1 ;; %addrOfGlobal = getelementptr int* %v2, long 0 ; <int*> [#uses=1] ;; %addrOfGlobal1 = getelementptr int* %v1, long 0 ; <int*> [#uses=1] ;; phi int* [ %addrOfGlobal, %1 ], [ %addrOfGlobal1, %0 ] ; <int*>:0 [#uses=1] ;; cast int* %0 to %struct..packet* ; <%struct..packet*>:1 [#uses=1] ;; call void %append( %struct..packet* %0, %struct..packet* %1 ) ;; ret %struct..task* null ;; } ;; llc: ../../../include/llvm/CodeGen/MachineInstr.h:294: int MachineOperand::getAllocatedRegNum() const: Assertion `hasAllocatedReg()' failed. ;; target endian = little target pointersize = 32 %struct..packet = type { %struct..packet*, int, int, int, [4 x sbyte] } %struct..task = type { %struct..task*, int, int, %struct..packet*, int, %struct..task* (%struct..packet*)*, int, int } %v1 = external global int %v2 = external global int implementation ; Functions: %struct..task* %handlerfn(%struct..packet* %pkt.2) { entry: ; No predecessors! %tmp.1 = setne %struct..packet* %pkt.2, null br bool %tmp.1, label %cond_false, label %cond_continue cond_false: ; preds = %entry br label %cond_continue cond_continue: ; preds = %entry, %cond_false %mem_tmp.0 = phi int* [ %v2, %cond_false ], [ %v1, %entry ] %tmp.12 = cast int* %mem_tmp.0 to %struct..packet* call void %append( %struct..packet* %pkt.2, %struct..packet* %tmp.12 ) ret %struct..task* null } declare void %append(%struct..packet*, %struct..packet*)