dfca6c0d3b
After unrolling, there may be additional simplifications that can be applied. One example is removing SCALAR-STEPS for the first part where only the first lane is demanded. This removes redundant adds of 0 from a large number of tests (~200), many which I am still working on updating. In preparation for removing redundant WideIV steps added in https://github.com/llvm/llvm-project/pull/119284. PR: https://github.com/llvm/llvm-project/pull/123655
87 lines
4.1 KiB
LLVM
87 lines
4.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
|
|
; RUN: opt -passes='loop-vectorize,loop-unroll' -force-vector-width=4 -S < %s | FileCheck %s
|
|
|
|
; Test if the follow-up metadata for loops works fine. The original code is
|
|
; something like below. In this case, unrolling should be applied after
|
|
; vectorization.
|
|
;
|
|
; void f(float *a, float x) {
|
|
; #pragma clang loop vectorize(enable) unroll_count(8)
|
|
; for (int i = 0; i < 1024; i++) {
|
|
; a[i] *= x;
|
|
; }
|
|
; }
|
|
;
|
|
; FIXME: Currently unrolling is not applied. This is because the new Loop ID
|
|
; created after vectorization does not directly contain unroll metadata.
|
|
; Unexpected nests have been created.
|
|
define void @f(ptr noundef captures(none) %a, float noundef %x) {
|
|
; CHECK-LABEL: define void @f(
|
|
; CHECK-SAME: ptr noundef captures(none) [[A:%.*]], float noundef [[X:%.*]]) {
|
|
; CHECK-NEXT: [[ENTRY:.*]]:
|
|
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
|
|
; CHECK: [[VECTOR_PH]]:
|
|
; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[X]], i64 0
|
|
; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x float> [[BROADCAST_SPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
|
|
; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
|
|
; CHECK: [[VECTOR_BODY]]:
|
|
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
|
|
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[INDEX]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds nuw float, ptr [[TMP14]], i32 0
|
|
; CHECK-NEXT: [[WIDE_LOAD_7:%.*]] = load <4 x float>, ptr [[TMP2]], align 4
|
|
; CHECK-NEXT: [[TMP15:%.*]] = fmul <4 x float> [[BROADCAST_SPLAT]], [[WIDE_LOAD_7]]
|
|
; CHECK-NEXT: store <4 x float> [[TMP15]], ptr [[TMP2]], align 4
|
|
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
|
|
; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1024
|
|
; CHECK-NEXT: br i1 [[TMP4]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
|
|
; CHECK: [[MIDDLE_BLOCK]]:
|
|
; CHECK-NEXT: br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
|
|
; CHECK: [[SCALAR_PH]]:
|
|
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 1024, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
|
|
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
|
|
; CHECK: [[FOR_BODY]]:
|
|
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ]
|
|
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw float, ptr [[A]], i64 [[IV]]
|
|
; CHECK-NEXT: [[LOAD:%.*]] = load float, ptr [[ARRAYIDX]], align 4
|
|
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[X]], [[LOAD]]
|
|
; CHECK-NEXT: store float [[MUL]], ptr [[ARRAYIDX]], align 4
|
|
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
|
|
; CHECK-NEXT: [[COMP:%.*]] = icmp eq i64 [[IV_NEXT]], 1024
|
|
; CHECK-NEXT: br i1 [[COMP]], label %[[EXIT_LOOPEXIT:.*]], label %[[FOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
|
|
; CHECK: [[EXIT_LOOPEXIT]]:
|
|
; CHECK-NEXT: br label %[[EXIT]]
|
|
; CHECK: [[EXIT]]:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body:
|
|
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
|
|
%arrayidx = getelementptr inbounds nuw float, ptr %a, i64 %iv
|
|
%load = load float, ptr %arrayidx, align 4
|
|
%mul = fmul float %x, %load
|
|
store float %mul, ptr %arrayidx, align 4
|
|
%iv.next = add nuw nsw i64 %iv, 1
|
|
%comp = icmp eq i64 %iv.next, 1024
|
|
br i1 %comp, label %exit, label %for.body, !llvm.loop !0
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
!0 = distinct !{!0, !1, !2}
|
|
!1 = !{!"llvm.loop.vectorize.enable", i1 true}
|
|
!2 = !{!"llvm.loop.vectorize.followup_all", !3}
|
|
!3 = distinct !{!3, !4, !5}
|
|
!4 = !{!"llvm.loop.isvectorized"}
|
|
!5 = !{!"llvm.loop.unroll.count", i32 8}
|
|
;.
|
|
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META4:![0-9]+]]}
|
|
; CHECK: [[META1]] = distinct !{[[META1]], [[META2:![0-9]+]], [[META3:![0-9]+]]}
|
|
; CHECK: [[META2]] = !{!"llvm.loop.isvectorized"}
|
|
; CHECK: [[META3]] = !{!"llvm.loop.unroll.count", i32 8}
|
|
; CHECK: [[META4]] = !{!"llvm.loop.unroll.runtime.disable"}
|
|
; CHECK: [[LOOP5]] = distinct !{[[LOOP5]], [[META1]]}
|
|
;.
|