forked from OSchip/llvm-project
38 lines
1.3 KiB
LLVM
38 lines
1.3 KiB
LLVM
; RUN: opt < %s -memcpyopt -S | FileCheck %s
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; These memmoves should get optimized to memcpys.
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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"
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target triple = "x86_64-apple-darwin9.0"
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declare void @llvm.memmove.i64(i8* nocapture, i8* nocapture, i64, i32) nounwind
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define i8* @test1(i8* nocapture %src) nounwind {
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entry:
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; CHECK: @test1
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; CHECK: call void @llvm.memcpy
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%call3 = malloc [13 x i8] ; <[13 x i8]*> [#uses=1]
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%call3.sub = getelementptr inbounds [13 x i8]* %call3, i64 0, i64 0 ; <i8*> [#uses=2]
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tail call void @llvm.memmove.i64(i8* %call3.sub, i8* %src, i64 13, i32 1)
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ret i8* %call3.sub
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}
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define void @test2(i8* %P) nounwind {
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entry:
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; CHECK: @test2
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; CHECK: call void @llvm.memcpy
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%add.ptr = getelementptr i8* %P, i64 16 ; <i8*> [#uses=1]
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tail call void @llvm.memmove.i64(i8* %P, i8* %add.ptr, i64 16, i32 1)
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ret void
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}
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; This cannot be optimize because the src/dst really do overlap.
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define void @test3(i8* %P) nounwind {
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entry:
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; CHECK: @test3
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; CHECK: call void @llvm.memmove
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%add.ptr = getelementptr i8* %P, i64 16 ; <i8*> [#uses=1]
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tail call void @llvm.memmove.i64(i8* %P, i8* %add.ptr, i64 17, i32 1)
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ret void
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}
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