forked from OSchip/llvm-project
138 lines
6.5 KiB
LLVM
138 lines
6.5 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -loop-idiom < %s -S | FileCheck %s
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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"
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; We do not necessarily have a loop with comparison of two loaded values.
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; The loop may already be doing bcmp() itself. We just need to widen it.
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; FIXME: -memcpyopt does not promote memcmp() source into memcmp() / bcmp().
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; #include <algorithm>
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;
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; // FIXME
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; bool widening_of_bcmp(char const* ptr0, char const* ptr1, size_t count) {
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; static constexpr auto Size = 32, Step = 32;
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; for(size_t i = 0; i < count; i++, ptr0 += Step, ptr1 += Step) {
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; if(bcmp(ptr0, ptr1, Size) != 0)
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; return false;
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; }
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; return true;
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; }
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;
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; // FIXME
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; bool widening_of_overlapping_bcmp(char const* ptr0, char const* ptr1, size_t count) {
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; static constexpr auto Size = 32, Step = 16;
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; for(size_t i = 0; i < count; i++, ptr0 += Step, ptr1 += Step) {
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; if(bcmp(ptr0, ptr1, Size) != 0)
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; return false;
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; }
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; return true;
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; }
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declare i32 @bcmp(i8*, i8*, i64)
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; FIXME
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define i1 @_Z18widening_of_bcmpPKcS0_m(i8* %ptr0, i8* %ptr1, i64 %count) {
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; CHECK-LABEL: @_Z18widening_of_bcmpPKcS0_m(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP7:%.*]] = icmp eq i64 [[COUNT:%.*]], 0
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; CHECK-NEXT: br i1 [[CMP7]], label [[CLEANUP:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
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; CHECK: for.body.preheader:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_010:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: [[PTR1_ADDR_09:%.*]] = phi i8* [ [[ADD_PTR2:%.*]], [[FOR_INC]] ], [ [[PTR1:%.*]], [[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: [[PTR0_ADDR_08:%.*]] = phi i8* [ [[ADD_PTR:%.*]], [[FOR_INC]] ], [ [[PTR0:%.*]], [[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: [[BCMP:%.*]] = tail call i32 @bcmp(i8* [[PTR0_ADDR_08]], i8* [[PTR1_ADDR_09]], i64 32)
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[BCMP]], 0
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; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_INC]], label [[CLEANUP_LOOPEXIT:%.*]]
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; CHECK: for.inc:
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; CHECK-NEXT: [[INC]] = add nuw i64 [[I_010]], 1
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; CHECK-NEXT: [[ADD_PTR]] = getelementptr inbounds i8, i8* [[PTR0_ADDR_08]], i64 32
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; CHECK-NEXT: [[ADD_PTR2]] = getelementptr inbounds i8, i8* [[PTR1_ADDR_09]], i64 32
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], [[COUNT]]
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP_LOOPEXIT]]
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; CHECK: cleanup.loopexit:
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; CHECK-NEXT: [[RES_PH:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
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; CHECK-NEXT: br label [[CLEANUP]]
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; CHECK: cleanup:
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; CHECK-NEXT: [[RES:%.*]] = phi i1 [ true, [[ENTRY:%.*]] ], [ [[RES_PH]], [[CLEANUP_LOOPEXIT]] ]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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entry:
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%cmp7 = icmp eq i64 %count, 0
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br i1 %cmp7, label %cleanup, label %for.body
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for.body: ; preds = %entry, %for.inc
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%i.010 = phi i64 [ %inc, %for.inc ], [ 0, %entry ]
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%ptr1.addr.09 = phi i8* [ %add.ptr2, %for.inc ], [ %ptr1, %entry ]
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%ptr0.addr.08 = phi i8* [ %add.ptr, %for.inc ], [ %ptr0, %entry ]
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%bcmp = tail call i32 @bcmp(i8* %ptr0.addr.08, i8* %ptr1.addr.09, i64 32)
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%cmp1 = icmp eq i32 %bcmp, 0
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br i1 %cmp1, label %for.inc, label %cleanup
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for.inc: ; preds = %for.body
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%inc = add nuw i64 %i.010, 1
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%add.ptr = getelementptr inbounds i8, i8* %ptr0.addr.08, i64 32
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%add.ptr2 = getelementptr inbounds i8, i8* %ptr1.addr.09, i64 32
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%cmp = icmp ult i64 %inc, %count
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br i1 %cmp, label %for.body, label %cleanup
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cleanup: ; preds = %for.body, %for.inc, %entry
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%res = phi i1 [ true, %entry ], [ true, %for.inc ], [ false, %for.body ]
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ret i1 %res
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}
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; FIXME
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define i1 @_Z30widening_of_overlapping_bcmpPKcS0_m(i8* %ptr0, i8* %ptr1, i64 %count) {
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; CHECK-LABEL: @_Z30widening_of_overlapping_bcmpPKcS0_m(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP7:%.*]] = icmp eq i64 [[COUNT:%.*]], 0
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; CHECK-NEXT: br i1 [[CMP7]], label [[CLEANUP:%.*]], label [[FOR_BODY_PREHEADER:%.*]]
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; CHECK: for.body.preheader:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_010:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: [[PTR1_ADDR_09:%.*]] = phi i8* [ [[ADD_PTR2:%.*]], [[FOR_INC]] ], [ [[PTR1:%.*]], [[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: [[PTR0_ADDR_08:%.*]] = phi i8* [ [[ADD_PTR:%.*]], [[FOR_INC]] ], [ [[PTR0:%.*]], [[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: [[BCMP:%.*]] = tail call i32 @bcmp(i8* [[PTR0_ADDR_08]], i8* [[PTR1_ADDR_09]], i64 32)
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[BCMP]], 0
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; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_INC]], label [[CLEANUP_LOOPEXIT:%.*]]
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; CHECK: for.inc:
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; CHECK-NEXT: [[INC]] = add nuw i64 [[I_010]], 1
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; CHECK-NEXT: [[ADD_PTR]] = getelementptr inbounds i8, i8* [[PTR0_ADDR_08]], i64 16
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; CHECK-NEXT: [[ADD_PTR2]] = getelementptr inbounds i8, i8* [[PTR1_ADDR_09]], i64 16
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], [[COUNT]]
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP_LOOPEXIT]]
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; CHECK: cleanup.loopexit:
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; CHECK-NEXT: [[RES_PH:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
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; CHECK-NEXT: br label [[CLEANUP]]
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; CHECK: cleanup:
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; CHECK-NEXT: [[RES:%.*]] = phi i1 [ true, [[ENTRY:%.*]] ], [ [[RES_PH]], [[CLEANUP_LOOPEXIT]] ]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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entry:
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%cmp7 = icmp eq i64 %count, 0
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br i1 %cmp7, label %cleanup, label %for.body
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for.body: ; preds = %entry, %for.inc
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%i.010 = phi i64 [ %inc, %for.inc ], [ 0, %entry ]
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%ptr1.addr.09 = phi i8* [ %add.ptr2, %for.inc ], [ %ptr1, %entry ]
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%ptr0.addr.08 = phi i8* [ %add.ptr, %for.inc ], [ %ptr0, %entry ]
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%bcmp = tail call i32 @bcmp(i8* %ptr0.addr.08, i8* %ptr1.addr.09, i64 32)
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%cmp1 = icmp eq i32 %bcmp, 0
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br i1 %cmp1, label %for.inc, label %cleanup
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for.inc: ; preds = %for.body
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%inc = add nuw i64 %i.010, 1
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%add.ptr = getelementptr inbounds i8, i8* %ptr0.addr.08, i64 16
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%add.ptr2 = getelementptr inbounds i8, i8* %ptr1.addr.09, i64 16
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%cmp = icmp ult i64 %inc, %count
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br i1 %cmp, label %for.body, label %cleanup
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cleanup: ; preds = %for.body, %for.inc, %entry
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%res = phi i1 [ true, %entry ], [ true, %for.inc ], [ false, %for.body ]
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ret i1 %res
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}
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