blob: 0c97e6ac475ee04813f0069fbaf4c125802e2d56 [file] [log] [blame]
; REQUIRES: asserts
; RUN: opt -loop-vectorize -force-vector-width=2 -debug-only=loop-vectorize -S -o - < %s 2>&1 | FileCheck %s
%struct.foo = type { i32, i64 }
; CHECK: LV: Found an estimated cost of 0 for VF 2 For instruction: %0 = bitcast i64* %b to i32*
; The bitcast below will be scalarized due to the predication in the loop. Bitcasts
; between pointer types should be treated as free, despite the scalarization.
define void @foo(%struct.foo* noalias nocapture %in, i32* noalias nocapture readnone %out, i64 %n) {
entry:
br label %for.body
for.body: ; preds = %entry, %if.end
%i.012 = phi i64 [ %inc, %if.end ], [ 0, %entry ]
%b = getelementptr inbounds %struct.foo, %struct.foo* %in, i64 %i.012, i32 1
%0 = bitcast i64* %b to i32*
%a = getelementptr inbounds %struct.foo, %struct.foo* %in, i64 %i.012, i32 0
%1 = load i32, i32* %a, align 8
%tobool.not = icmp eq i32 %1, 0
br i1 %tobool.not, label %if.end, label %land.lhs.true
land.lhs.true: ; preds = %for.body
%2 = load i32, i32* %0, align 4
%cmp2 = icmp sgt i32 %2, 0
br i1 %cmp2, label %if.then, label %if.end
if.then: ; preds = %land.lhs.true
%sub = add nsw i32 %2, -1
store i32 %sub, i32* %0, align 4
br label %if.end
if.end: ; preds = %if.then, %land.lhs.true, %for.body
%inc = add nuw nsw i64 %i.012, 1
%exitcond.not = icmp eq i64 %inc, %n
br i1 %exitcond.not, label %for.end, label %for.body
for.end: ; preds = %if.end
ret void
}