67 lines
2.4 KiB
LLVM
67 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; This test makes sure that memmove instructions are properly eliminated.
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;
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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@S = internal constant [33 x i8] c"panic: restorelist inconsistency\00" ; <ptr> [#uses=1]
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@h = constant [2 x i8] c"h\00" ; <ptr> [#uses=1]
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@hel = constant [4 x i8] c"hel\00" ; <ptr> [#uses=1]
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@hello_u = constant [8 x i8] c"hello_u\00" ; <ptr> [#uses=1]
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define void @test1(ptr %A, ptr %B, i32 %N) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret void
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;
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call void @llvm.memmove.p0.p0.i32(ptr %A, ptr %B, i32 0, i1 false)
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ret void
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}
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define void @test2(ptr %A, i32 %N) {
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;; dest can't alias source since we can't write to source!
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[A:%.*]], ptr nonnull align 16 @S, i32 [[N:%.*]], i1 false)
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; CHECK-NEXT: ret void
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;
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call void @llvm.memmove.p0.p0.i32(ptr %A, ptr @S, i32 %N, i1 false)
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ret void
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}
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define i32 @test3(ptr %target) { ; arg: ptr> [#uses=1]
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: store i16 104, ptr [[TARGET:%.*]], align 2
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; CHECK-NEXT: store i32 7103848, ptr [[TARGET]], align 4
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; CHECK-NEXT: store i64 33037504440198504, ptr [[TARGET]], align 8
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; CHECK-NEXT: ret i32 0
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;
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%h_p = getelementptr [2 x i8], ptr @h, i32 0, i32 0 ; <ptr> [#uses=1]
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%hel_p = getelementptr [4 x i8], ptr @hel, i32 0, i32 0 ; <ptr> [#uses=1]
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%hello_u_p = getelementptr [8 x i8], ptr @hello_u, i32 0, i32 0 ; <ptr> [#uses=1]
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%target_p = getelementptr [1024 x i8], ptr %target, i32 0, i32 0 ; <ptr> [#uses=3]
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call void @llvm.memmove.p0.p0.i32(ptr align 2 %target_p, ptr align 2 %h_p, i32 2, i1 false)
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call void @llvm.memmove.p0.p0.i32(ptr align 4 %target_p, ptr align 4 %hel_p, i32 4, i1 false)
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call void @llvm.memmove.p0.p0.i32(ptr align 8 %target_p, ptr align 8 %hello_u_p, i32 8, i1 false)
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ret i32 0
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}
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; PR2370
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define void @test4(ptr %a) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: ret void
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;
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tail call void @llvm.memmove.p0.p0.i32(ptr %a, ptr %a, i32 100, i1 false)
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ret void
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}
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@UnknownConstant = external constant i128
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define void @memmove_to_constant(ptr %src) {
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; CHECK-LABEL: @memmove_to_constant(
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; CHECK-NEXT: ret void
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;
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call void @llvm.memmove.p0.p0.i32(ptr @UnknownConstant, ptr %src, i32 16, i1 false)
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ret void
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}
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declare void @llvm.memmove.p0.p0.i32(ptr nocapture, ptr nocapture readonly, i32, i1) argmemonly nounwind
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