1d9775f684
The canonical form preferred by instcombine is to use 64-bit values for the index when it is a constant. We should try to do the same where possible in the loop vectoriser as this reduces churn in the compiler. It also makes other work easier, such as removing extra unnecessary passes on the RUN line in the test directory which I plan to do afterwards.
90 lines
4.0 KiB
LLVM
90 lines
4.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "^scalar.ph" --version 6
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; RUN: opt -S -passes=loop-vectorize -enable-vplan-native-path -verify-loop-info -verify-dom-info < %s | FileCheck %s
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; extern int arr[8][8];
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; extern int arr2[8];
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;
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; void foo(int n)
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; {
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; int i1, i2;
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;
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; #pragma clang loop vectorize(enable) vectorize_width(4)
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; for (i1 = 0; i1 < 8; i1++) {
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; arr2[i1] = i1;
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; for (i2 = 0; i2 < 8; i2++)
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; arr[i2][i1] = i1 + n;
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; }
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; }
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;
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@arr2 = external global [8 x i32], align 16
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@arr = external global [8 x [8 x i32]], align 16
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define void @foo(i32 %n) {
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; CHECK-LABEL: define void @foo(
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; CHECK-SAME: i32 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
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; CHECK: [[VECTOR_PH]]:
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; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[N]], i64 0
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; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer
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; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
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; CHECK: [[VECTOR_BODY]]:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_LATCH:.*]] ]
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; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_LATCH]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds [8 x i32], ptr @arr2, i64 0, <4 x i64> [[VEC_IND]]
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; CHECK-NEXT: [[TMP1:%.*]] = trunc <4 x i64> [[VEC_IND]] to <4 x i32>
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; CHECK-NEXT: call void @llvm.masked.scatter.v4i32.v4p0(<4 x i32> [[TMP1]], <4 x ptr> align 4 [[TMP0]], <4 x i1> splat (i1 true))
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; CHECK-NEXT: [[TMP2:%.*]] = add nsw <4 x i32> [[TMP1]], [[BROADCAST_SPLAT]]
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; CHECK-NEXT: br label %[[FOR_BODY31:.*]]
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; CHECK: [[FOR_BODY31]]:
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; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <4 x i64> [ zeroinitializer, %[[VECTOR_BODY]] ], [ [[TMP4:%.*]], %[[FOR_BODY31]] ]
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; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds [8 x [8 x i32]], ptr @arr, i64 0, <4 x i64> [[VEC_PHI]], <4 x i64> [[VEC_IND]]
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; CHECK-NEXT: call void @llvm.masked.scatter.v4i32.v4p0(<4 x i32> [[TMP2]], <4 x ptr> align 4 [[TMP3]], <4 x i1> splat (i1 true))
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; CHECK-NEXT: [[TMP4]] = add nuw nsw <4 x i64> [[VEC_PHI]], splat (i64 1)
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq <4 x i64> [[TMP4]], splat (i64 8)
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; CHECK-NEXT: [[TMP6:%.*]] = extractelement <4 x i1> [[TMP5]], i64 0
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; CHECK-NEXT: br i1 [[TMP6]], label %[[VECTOR_LATCH]], label %[[FOR_BODY31]]
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; CHECK: [[VECTOR_LATCH]]:
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
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; CHECK-NEXT: [[VEC_IND_NEXT]] = add nuw nsw <4 x i64> [[VEC_IND]], splat (i64 4)
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; CHECK-NEXT: [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT]], 8
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; CHECK-NEXT: br i1 [[TMP7]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: [[MIDDLE_BLOCK]]:
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; CHECK-NEXT: br label %[[SCALAR_PH:.*]]
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; CHECK: [[SCALAR_PH]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %outer.header
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outer.header:
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%iv.outer = phi i64 [ 0, %entry ], [ %iv.outer.next, %outer.latch ]
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%gep.arr2 = getelementptr inbounds [8 x i32], ptr @arr2, i64 0, i64 %iv.outer
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%i.trunc = trunc i64 %iv.outer to i32
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store i32 %i.trunc, ptr %gep.arr2, align 4
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%i.trunc2 = trunc i64 %iv.outer to i32
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%add = add nsw i32 %i.trunc2, %n
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br label %inner
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inner:
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%iv.inner = phi i64 [ 0, %outer.header ], [ %iv.inner.next, %inner ]
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%gep.arr = getelementptr inbounds [8 x [8 x i32]], ptr @arr, i64 0, i64 %iv.inner, i64 %iv.outer
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store i32 %add, ptr %gep.arr, align 4
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%iv.inner.next = add nuw nsw i64 %iv.inner, 1
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%inner.ec = icmp eq i64 %iv.inner.next, 8
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br i1 %inner.ec, label %outer.latch, label %inner
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outer.latch:
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%iv.outer.next = add nuw nsw i64 %iv.outer, 1
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%outer.ec = icmp eq i64 %iv.outer.next, 8
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br i1 %outer.ec, label %exit, label %outer.header, !llvm.loop !1
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exit:
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ret void
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}
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!1 = distinct !{!1, !2, !3}
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!2 = !{!"llvm.loop.vectorize.width", i32 4}
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!3 = !{!"llvm.loop.vectorize.enable", i1 true}
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