48 lines
2.0 KiB
LLVM
48 lines
2.0 KiB
LLVM
|
; RUN: opt < %s -disable-loop-unrolling -debug-only=loop-vectorize -passes='default<O3>' -S 2>&1 | FileCheck %s
|
||
|
|
; RUN: opt < %s -disable-loop-unrolling -debug-only=loop-vectorize -O3 -S 2>&1 | FileCheck %s
|
||
|
|
; REQUIRES: asserts
|
||
|
|
; We want to make sure that we don't even try to vectorize loops again
|
||
|
|
; The vectorizer used to mark the un-vectorized loop only as already vectorized
|
||
|
|
; thus, trying to vectorize the vectorized loop again
|
||
|
|
|
||
|
|
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-unknown-linux-gnu"
|
||
|
|
|
||
|
|
@a = external global [255 x i32]
|
||
|
|
|
||
|
|
; Function Attrs: nounwind readonly uwtable
|
||
|
|
define i32 @vect() {
|
||
|
|
; CHECK: LV: Checking a loop in "vect"
|
||
|
|
entry:
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body: ; preds = %for.body, %entry
|
||
|
|
; We need to make sure we did vectorize the loop
|
||
|
|
; CHECK: LV: Found a loop: for.body
|
||
|
|
; CHECK: LV: We can vectorize this loop!
|
||
|
|
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
|
||
|
|
%red.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
|
||
|
|
%arrayidx = getelementptr inbounds [255 x i32], [255 x i32]* @a, i64 0, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%add = add nsw i32 %0, %red.05
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%exitcond = icmp eq i64 %indvars.iv.next, 255
|
||
|
|
br i1 %exitcond, label %for.end, label %for.body
|
||
|
|
|
||
|
|
; If it did, we have two loops:
|
||
|
|
; CHECK: vector.body:
|
||
|
|
; CHECK: br {{.*}} label %vector.body, !llvm.loop [[vect:![0-9]+]]
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK: br {{.*}} label %for.body{{.*}}, !llvm.loop [[scalar:![0-9]+]]
|
||
|
|
|
||
|
|
for.end: ; preds = %for.body
|
||
|
|
ret i32 %add
|
||
|
|
}
|
||
|
|
|
||
|
|
; Now, we check for the Hint metadata
|
||
|
|
; CHECK: [[vect]] = distinct !{[[vect]], [[width:![0-9]+]]}
|
||
|
|
; CHECK: [[width]] = !{!"llvm.loop.isvectorized", i32 1}
|
||
|
|
; CHECK: [[scalar]] = distinct !{[[scalar]], [[runtime_unroll:![0-9]+]], [[width]]}
|
||
|
|
; CHECK: [[runtime_unroll]] = !{!"llvm.loop.unroll.runtime.disable"}
|
||
|
|
|