derek.holloway
7502bf64a4
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43 lines
2.0 KiB
LLVM
43 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-inst-comments --version 6
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; RUN: opt -passes='print<memoryssa-walker>' -disable-output < %s 2>&1 | FileCheck %s
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; Make sure that the memcpy is clobbered by the memoryphi, not by liveOnEntry.
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define void @test(i1 %c, ptr %path, ptr %name) {
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; CHECK-LABEL: define void @test(
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; CHECK-SAME: i1 [[C:%.*]], ptr [[PATH:%.*]], ptr [[NAME:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[TMP:%.*]] = alloca [260 x i8], align 16
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; CHECK-NEXT: br label %[[WHILE_BODY:.*]]
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; CHECK: [[WHILE_BODY]]:
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; CHECK-NEXT: ; 3 = MemoryPhi({entry,liveOnEntry},{while.body,1})
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; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], %[[WHILE_BODY]] ], [ 259, %[[ENTRY]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add nsw i64 [[IV]], -1
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; CHECK-NEXT: [[TMP_IV:%.*]] = getelementptr inbounds [260 x i8], ptr [[TMP]], i64 0, i64 [[IV]]
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; CHECK-NEXT: ; 1 = MemoryDef(3)->3 - clobbered by 3 = MemoryPhi({entry,liveOnEntry},{while.body,1})
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; CHECK-NEXT: store i8 42, ptr [[TMP_IV]], align 1
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; CHECK-NEXT: br i1 [[C]], label %[[WHILE_BODY]], label %[[EXIT:.*]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[TMP_IV_1:%.*]] = getelementptr inbounds i8, ptr [[TMP_IV]], i64 1
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; CHECK-NEXT: [[SUB7:%.*]] = sub nsw i64 259, [[IV]]
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; CHECK-NEXT: ; 2 = MemoryDef(1)->3 - clobbered by 3 = MemoryPhi({entry,liveOnEntry},{while.body,1})
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[NAME]], ptr nonnull align 1 [[TMP_IV_1]], i64 [[SUB7]], i1 false)
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; CHECK-NEXT: ret void
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;
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entry:
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%tmp = alloca [260 x i8], align 16
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br label %while.body
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while.body:
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%iv = phi i64 [ %iv.next, %while.body ], [ 259, %entry ]
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%iv.next = add nsw i64 %iv, -1
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%tmp.iv = getelementptr inbounds [260 x i8], ptr %tmp, i64 0, i64 %iv
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store i8 42, ptr %tmp.iv, align 1
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br i1 %c, label %while.body, label %exit
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exit:
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%tmp.iv.1 = getelementptr inbounds i8, ptr %tmp.iv, i64 1
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%sub7 = sub nsw i64 259, %iv
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call void @llvm.memcpy(ptr align 1 %name, ptr nonnull align 1 %tmp.iv.1, i64 %sub7, i1 false)
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ret void
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}
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