69 lines
3.3 KiB
LLVM
69 lines
3.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=memcpyopt < %s | FileCheck %s
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define void @test_copy_uninit(ptr %arg) {
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; CHECK-LABEL: @test_copy_uninit(
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; CHECK-NEXT: start:
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; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [1000 x i32], align 4
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; CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [1000 x [1000 x i32]], ptr [[ARG:%.*]], i64 0, i64 1000
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[CURRENT:%.*]] = phi ptr [ [[ARG]], [[START:%.*]] ], [ [[NEXT:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[NEXT]] = getelementptr inbounds [1000 x i32], ptr [[CURRENT]], i64 1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq ptr [[NEXT]], [[END]]
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; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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start:
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%alloca = alloca [1000 x i32], align 4
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%end = getelementptr inbounds [1000 x [1000 x i32]], ptr %arg, i64 0, i64 1000
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br label %loop
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loop: ; preds = %loop, %start
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%current = phi ptr [ %arg, %start ], [ %next, %loop ]
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call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 4 dereferenceable(4000) %current, ptr nonnull align 4 dereferenceable(4000) %alloca, i64 4000, i1 false)
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%next = getelementptr inbounds [1000 x i32], ptr %current, i64 1
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%cond = icmp eq ptr %next, %end
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br i1 %cond, label %exit, label %loop
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exit: ; preds = %loop
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ret void
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}
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define void @test_copy_zero(ptr %arg) {
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; CHECK-LABEL: @test_copy_zero(
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; CHECK-NEXT: start:
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; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [1000 x i32], align 4
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr nonnull align 4 dereferenceable(4000) [[ALLOCA]], i8 0, i64 4000, i1 false)
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; CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [1000 x [1000 x i32]], ptr [[ARG:%.*]], i64 0, i64 1000
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[CURRENT:%.*]] = phi ptr [ [[ARG]], [[START:%.*]] ], [ [[NEXT:%.*]], [[LOOP]] ]
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[CURRENT]], i8 0, i64 4000, i1 false)
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; CHECK-NEXT: [[NEXT]] = getelementptr inbounds [1000 x i32], ptr [[CURRENT]], i64 1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq ptr [[NEXT]], [[END]]
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; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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start:
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%alloca = alloca [1000 x i32], align 4
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call void @llvm.memset.p0.i64(ptr nonnull align 4 dereferenceable(4000) %alloca, i8 0, i64 4000, i1 false)
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%end = getelementptr inbounds [1000 x [1000 x i32]], ptr %arg, i64 0, i64 1000
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br label %loop
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loop: ; preds = %loop, %start
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%current = phi ptr [ %arg, %start ], [ %next, %loop ]
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call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 4 dereferenceable(4000) %current, ptr nonnull align 4 dereferenceable(4000) %alloca, i64 4000, i1 false)
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%next = getelementptr inbounds [1000 x i32], ptr %current, i64 1
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%cond = icmp eq ptr %next, %end
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br i1 %cond, label %exit, label %loop
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exit: ; preds = %loop
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ret void
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}
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declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
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declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)
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