forked from OSchip/llvm-project
45 lines
1.8 KiB
LLVM
45 lines
1.8 KiB
LLVM
|
; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -S |FileCheck %s
|
||
|
|
; SCEV expansion uses existing value or value + offset to reduce duplicate code expansion so foo should only generate one select inst after loop vectorization.
|
||
|
|
; CHECK-LABEL: @foo(
|
||
|
|
; CHECK: select
|
||
|
|
; CHECK-NOT: select
|
||
|
|
|
||
|
|
@ySrcL = common global i8* null, align 8
|
||
|
|
@smL = common global i32 0, align 4
|
||
|
|
|
||
|
|
define void @foo(i32 %rwL, i32 %kL, i32 %xfL) {
|
||
|
|
entry:
|
||
|
|
%sub = add nsw i32 %rwL, -1
|
||
|
|
%shr = ashr i32 %xfL, 6
|
||
|
|
%cmp.i = icmp slt i32 %sub, %shr
|
||
|
|
%cond.i = select i1 %cmp.i, i32 %sub, i32 %shr
|
||
|
|
%cmp6 = icmp sgt i32 %cond.i, %kL
|
||
|
|
br i1 %cmp6, label %for.body.lr.ph, label %for.end
|
||
|
|
|
||
|
|
for.body.lr.ph: ; preds = %entry
|
||
|
|
%tmp = load i8*, i8** @ySrcL, align 8
|
||
|
|
%tmp1 = sext i32 %kL to i64
|
||
|
|
%tmp2 = sext i32 %cond.i to i64
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body: ; preds = %for.body, %for.body.lr.ph
|
||
|
|
%indvars.iv = phi i64 [ %tmp1, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
|
||
|
|
%reduct.07 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
|
||
|
|
%arrayidx = getelementptr inbounds i8, i8* %tmp, i64 %indvars.iv
|
||
|
|
%tmp3 = load i8, i8* %arrayidx, align 1
|
||
|
|
%conv = zext i8 %tmp3 to i32
|
||
|
|
%add = add nsw i32 %conv, %reduct.07
|
||
|
|
%indvars.iv.next = add nsw i64 %indvars.iv, 1
|
||
|
|
%cmp = icmp slt i64 %indvars.iv.next, %tmp2
|
||
|
|
br i1 %cmp, label %for.body, label %for.end.loopexit
|
||
|
|
|
||
|
|
for.end.loopexit: ; preds = %for.body
|
||
|
|
%add.lcssa = phi i32 [ %add, %for.body ]
|
||
|
|
br label %for.end
|
||
|
|
|
||
|
|
for.end: ; preds = %for.end.loopexit, %entry
|
||
|
|
%reduct.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ]
|
||
|
|
store i32 %reduct.0.lcssa, i32* @smL, align 4
|
||
|
|
ret void
|
||
|
|
}
|