3 more bugs from the SPEC codes and from richards_benchmark.c

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6458 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 58 insertions, 0 deletions

diff --git a/test/LLC/2003-05-30-BadPreselectPhi.ll b/test/LLC/2003-05-30-BadPreselectPhi.ll
new file mode 100644
index 0000000..76f4a91
--- /dev/null
+++ b/test/LLC/2003-05-30-BadPreselectPhi.ll
@@ -0,0 +1,58 @@
+;; 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*)