//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "loop-rotate"
-
#include "llvm/Transforms/Scalar.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/Support/Debug.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/SmallVector.h"
-
using namespace llvm;
#define MAX_HEADER_SIZE 16
assert(NewHeader && "Unable to determine new loop header");
assert(L->contains(NewHeader) && !L->contains(Exit) &&
"Unable to determine loop header and exit blocks");
+
+ // This code assumes that new header has exactly one predecessor. Remove any
+ // single entry PHI nodes in it.
+ assert(NewHeader->getSinglePredecessor() &&
+ "New header doesn't have one pred!");
+ FoldSingleEntryPHINodes(NewHeader);
// Copy PHI nodes and other instructions from original header
// into original pre-header. Unlike original header, original pre-header is
--- /dev/null
+; RUN: llvm-as < %s | opt -loop-rotate | llvm-dis
+; PR3408
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+ %struct.Cls = type { i32, i8, [2 x %struct.Cls*], [2 x %struct.Lit*] }
+ %struct.Lit = type { i8 }
+
+define void @picosat_main_bb13.i.i71.outer_bb132.i.i.i.outer(%struct.Cls**, %struct.Cls**, i32 %collect.i.i.i.1.lcssa, i32 %lcollect.i.i.i.2.lcssa, %struct.Cls*** %rhead.tmp.0236.out, i32* %collect.i.i.i.2.out, i32* %lcollect.i.i.i.3.ph.ph.ph.out) nounwind {
+newFuncRoot:
+ br label %codeRepl
+
+bb133.i.i.i.exitStub: ; preds = %codeRepl
+ ret void
+
+bb130.i.i.i: ; preds = %codeRepl
+ %rhead.tmp.0236.lcssa82 = phi %struct.Cls** [ null, %codeRepl ] ; <%struct.Cls**> [#uses=0]
+ br label %codeRepl
+
+codeRepl: ; preds = %bb130.i.i.i, %newFuncRoot
+ br i1 false, label %bb130.i.i.i, label %bb133.i.i.i.exitStub
+}