ValueVector Reads;
ValueVector Writes;
+ SmallPtrSet<Value*, 16> AnalyzedPtrs;
unsigned NumPhis = 0;
for (BasicBlock::iterator it = BB.begin(), e = BB.end(); it != e; ++it) {
Instruction *I = it;
DEBUG(dbgs() << "LV: Found a non-simple load.\n");
return false;
}
- GetUnderlyingObjects(Ld->getPointerOperand(), Reads, DL);
+
+ Value* Ptr = Ld->getPointerOperand();
+ if (AnalyzedPtrs.insert(Ptr))
+ GetUnderlyingObjects(Ptr, Reads, DL);
}
// Record store pointers. Abort on all other instructions that write to
DEBUG(dbgs() << "LV: Found a non-simple store.\n");
return false;
}
- GetUnderlyingObjects(St->getPointerOperand(), Writes, DL);
+
+ Value* Ptr = St->getPointerOperand();
+ if (AnalyzedPtrs.insert(Ptr))
+ GetUnderlyingObjects(St->getPointerOperand(), Writes, DL);
}
// We still don't handle functions.
--- /dev/null
+; RUN: opt < %s -loop-vectorize -dce -instcombine -licm -S | FileCheck %s
+
+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-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.8.0"
+
+@a = common global [2048 x i32] zeroinitializer, align 16
+
+; This is the loop.
+; for (i=0; i<n; i++){
+; a[i] += i;
+; }
+;CHECK: @inc
+;CHECK: load <4 x i32>
+;CHECK: add <4 x i32>
+;CHECK: store <4 x i32>
+;CHECK: ret void
+define void @inc(i32 %n) nounwind uwtable noinline ssp {
+ %1 = icmp sgt i32 %n, 0
+ br i1 %1, label %.lr.ph, label %._crit_edge
+
+.lr.ph: ; preds = %0, %.lr.ph
+ %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
+ %2 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %indvars.iv
+ %3 = load i32* %2, align 4
+ %4 = trunc i64 %indvars.iv to i32
+ %5 = add nsw i32 %3, %4
+ store i32 %5, i32* %2, align 4
+ %indvars.iv.next = add i64 %indvars.iv, 1
+ %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+ %exitcond = icmp eq i32 %lftr.wideiv, %n
+ br i1 %exitcond, label %._crit_edge, label %.lr.ph
+
+._crit_edge: ; preds = %.lr.ph, %0
+ ret void
+}