469702c5d5
Unused loop invariant loads were not sunk from the preheader to the exit block, increasing live range. This commit moves the sinkUnusedInvariant logic from indvarsimplify to LICM also adds functionality to sink unused load that's not clobbered by the loop body.
131 lines
7.1 KiB
LLVM
131 lines
7.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -passes="default<O3>" -S -o - %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-macosx14.0.0"
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define void @s172(i32 noundef %xa, i32 noundef %xb, ptr noundef %a, ptr noundef %b) {
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; CHECK-LABEL: define void @s172(
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; CHECK-SAME: i32 noundef [[XA:%.*]], i32 noundef [[XB:%.*]], ptr noundef captures(none) [[A:%.*]], ptr noundef readonly captures(none) [[B:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[XA]], 32001
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; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
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; CHECK: for.body.preheader:
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[XA]], -1
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; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[SUB]] to i64
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; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[XB]] to i64
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; CHECK-NEXT: [[TMP2:%.*]] = tail call i64 @llvm.smax.i64(i64 [[TMP0]], i64 31999)
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; CHECK-NEXT: [[SMAX10:%.*]] = add nuw nsw i64 [[TMP2]], 1
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; CHECK-NEXT: [[TMP8:%.*]] = sub i64 [[SMAX10]], [[TMP0]]
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; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ugt i64 [[TMP8]], 23
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; CHECK-NEXT: [[IDENT_CHECK_NOT:%.*]] = icmp eq i32 [[XB]], 1
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; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[MIN_ITERS_CHECK]], [[IDENT_CHECK_NOT]]
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; CHECK-NEXT: br i1 [[OR_COND]], label [[VECTOR_MEMCHECK:%.*]], label [[FOR_BODY_PREHEADER13:%.*]]
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; CHECK: vector.memcheck:
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; CHECK-NEXT: [[TMP9:%.*]] = shl nsw i64 [[TMP0]], 2
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; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP9]]
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; CHECK-NEXT: [[TMP10:%.*]] = add nsw i64 [[TMP1]], [[TMP0]]
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; CHECK-NEXT: [[SMAX:%.*]] = tail call i64 @llvm.smax.i64(i64 [[TMP10]], i64 32000)
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; CHECK-NEXT: [[TMP11:%.*]] = icmp slt i64 [[TMP10]], 32000
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; CHECK-NEXT: [[UMIN:%.*]] = zext i1 [[TMP11]] to i64
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; CHECK-NEXT: [[TMP12:%.*]] = add nsw i64 [[TMP10]], [[UMIN]]
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; CHECK-NEXT: [[TMP13:%.*]] = sub i64 [[SMAX]], [[TMP12]]
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; CHECK-NEXT: [[TMP14:%.*]] = add i64 [[TMP13]], [[UMIN]]
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; CHECK-NEXT: [[TMP15:%.*]] = add i64 [[TMP14]], [[TMP0]]
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; CHECK-NEXT: [[TMP16:%.*]] = shl i64 [[TMP15]], 2
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; CHECK-NEXT: [[TMP17:%.*]] = add i64 [[TMP16]], 4
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; CHECK-NEXT: [[SCEVGEP4:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP17]]
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; CHECK-NEXT: [[SCEVGEP5:%.*]] = getelementptr i8, ptr [[B]], i64 [[TMP9]]
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; CHECK-NEXT: [[SCEVGEP6:%.*]] = getelementptr i8, ptr [[B]], i64 [[TMP17]]
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; CHECK-NEXT: [[BOUND0:%.*]] = icmp ult ptr [[SCEVGEP]], [[SCEVGEP6]]
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; CHECK-NEXT: [[BOUND1:%.*]] = icmp ult ptr [[SCEVGEP5]], [[SCEVGEP4]]
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; CHECK-NEXT: [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
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; CHECK-NEXT: br i1 [[FOUND_CONFLICT]], label [[FOR_BODY_PREHEADER13]], label [[VECTOR_PH:%.*]]
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; CHECK: vector.ph:
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; CHECK-NEXT: [[N_VEC:%.*]] = and i64 [[TMP8]], -8
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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_BODY]] ]
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; CHECK-NEXT: [[OFFSET_IDX:%.*]] = add i64 [[INDEX]], [[TMP0]]
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; CHECK-NEXT: [[TMP20:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[OFFSET_IDX]]
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; CHECK-NEXT: [[TMP21:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP20]], i64 16
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; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP20]], align 4, !alias.scope [[META0:![0-9]+]]
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; CHECK-NEXT: [[WIDE_LOAD10:%.*]] = load <4 x i32>, ptr [[TMP21]], align 4, !alias.scope [[META0]]
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; CHECK-NEXT: [[TMP22:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[OFFSET_IDX]]
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; CHECK-NEXT: [[TMP23:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP22]], i64 16
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; CHECK-NEXT: [[WIDE_LOAD11:%.*]] = load <4 x i32>, ptr [[TMP22]], align 4, !alias.scope [[META3:![0-9]+]], !noalias [[META0]]
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; CHECK-NEXT: [[WIDE_LOAD12:%.*]] = load <4 x i32>, ptr [[TMP23]], align 4, !alias.scope [[META3]], !noalias [[META0]]
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; CHECK-NEXT: [[TMP24:%.*]] = add nsw <4 x i32> [[WIDE_LOAD11]], [[WIDE_LOAD]]
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; CHECK-NEXT: [[TMP25:%.*]] = add nsw <4 x i32> [[WIDE_LOAD12]], [[WIDE_LOAD10]]
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; CHECK-NEXT: store <4 x i32> [[TMP24]], ptr [[TMP22]], align 4, !alias.scope [[META3]], !noalias [[META0]]
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; CHECK-NEXT: store <4 x i32> [[TMP25]], ptr [[TMP23]], align 4, !alias.scope [[META3]], !noalias [[META0]]
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
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; CHECK-NEXT: [[TMP26:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
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; CHECK-NEXT: br i1 [[TMP26]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
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; CHECK: middle.block:
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; CHECK-NEXT: [[IND_END:%.*]] = add i64 [[N_VEC]], [[TMP0]]
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; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP8]], [[N_VEC]]
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; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_END]], label [[FOR_BODY_PREHEADER13]]
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; CHECK: for.body.preheader14:
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; CHECK-NEXT: [[INDVARS_IV_PH:%.*]] = phi i64 [ [[TMP0]], [[VECTOR_MEMCHECK]] ], [ [[TMP0]], [[FOR_BODY_PREHEADER]] ], [ [[IND_END]], [[MIDDLE_BLOCK]] ]
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ [[INDVARS_IV_PH]], [[FOR_BODY_PREHEADER13]] ]
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; CHECK-NEXT: [[GEP_B:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: [[L_B:%.*]] = load i32, ptr [[GEP_B]], align 4
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; CHECK-NEXT: [[GEP_A:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: [[L_A:%.*]] = load i32, ptr [[GEP_A]], align 4
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; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[L_A]], [[L_B]]
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; CHECK-NEXT: store i32 [[ADD]], ptr [[GEP_A]], align 4
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nsw i64 [[INDVARS_IV]], [[TMP1]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[INDVARS_IV_NEXT]], 32000
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END]], !llvm.loop [[LOOP9:![0-9]+]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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entry:
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%sub = sub nsw i32 %xa, 1
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br label %for.cond
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for.cond:
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%i.0 = phi i32 [ %sub, %entry ], [ %add3, %for.inc ]
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%cmp = icmp slt i32 %i.0, 32000
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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for.body:
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%idxprom = sext i32 %i.0 to i64
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%gep.b = getelementptr inbounds i32, ptr %b, i64 %idxprom
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%l.b = load i32, ptr %gep.b, align 4
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%idxprom1 = sext i32 %i.0 to i64
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%gep.a = getelementptr inbounds i32, ptr %a, i64 %idxprom1
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%l.a = load i32, ptr %gep.a , align 4
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%add = add nsw i32 %l.a, %l.b
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store i32 %add, ptr %gep.a, align 4
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br label %for.inc
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for.inc:
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%add3 = add nsw i32 %i.0, %xb
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br label %for.cond, !llvm.loop !0
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for.cond.cleanup:
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br label %for.end
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for.end:
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ret void
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}
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!0 = distinct !{!0, !1}
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!1 = !{!"llvm.loop.mustprogress"}
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;.
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; CHECK: [[META0]] = !{[[META1:![0-9]+]]}
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; CHECK: [[META1]] = distinct !{[[META1]], [[META2:![0-9]+]]}
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; CHECK: [[META2]] = distinct !{[[META2]], !"LVerDomain"}
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; CHECK: [[META3]] = !{[[META4:![0-9]+]]}
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; CHECK: [[META4]] = distinct !{[[META4]], [[META2]]}
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; CHECK: [[LOOP5]] = distinct !{[[LOOP5]], [[META6:![0-9]+]], [[META7:![0-9]+]], [[META8:![0-9]+]]}
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; CHECK: [[META6]] = !{!"llvm.loop.mustprogress"}
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; CHECK: [[META7]] = !{!"llvm.loop.isvectorized", i32 1}
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; CHECK: [[META8]] = !{!"llvm.loop.unroll.runtime.disable"}
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; CHECK: [[LOOP9]] = distinct !{[[LOOP9]], [[META6]], [[META7]]}
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;.
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