derek.holloway
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42 lines
1.4 KiB
LLVM
42 lines
1.4 KiB
LLVM
; Test that the memmove library call simplifier works correctly.
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;
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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declare ptr @memmove(ptr, ptr, i32)
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; Check memmove(mem1, mem2, size) -> llvm.memmove(mem1, mem2, size, 1).
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define ptr @test_simplify1(ptr %mem1, ptr %mem2, i32 %size) {
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; CHECK-LABEL: @test_simplify1(
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%ret = call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
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; CHECK: call void @llvm.memmove
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ret ptr %ret
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; CHECK: ret ptr %mem1
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}
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define ptr @test_simplify2(ptr %mem1, ptr %mem2, i32 %size) {
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; CHECK-LABEL: @test_simplify2(
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; CHECK-NEXT: tail call void @llvm.memmove
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; CHECK-NEXT: ret ptr %mem1
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%ret = tail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
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ret ptr %ret
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}
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define ptr @test_no_simplify1(ptr %mem1, ptr %mem2, i32 %size) {
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; CHECK-LABEL: @test_no_simplify1(
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; CHECK-NEXT: %ret = musttail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
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; CHECK-NEXT: ret ptr %ret
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%ret = musttail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
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ret ptr %ret
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}
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define ptr @test_no_incompatible_attr(ptr %mem1, ptr %mem2, i32 %size) {
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; CHECK-LABEL: @test_no_incompatible_attr(
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%ret = call dereferenceable(1) ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
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; CHECK: call void @llvm.memmove
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ret ptr %ret
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; CHECK: ret ptr %mem1
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}
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