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82 lines
2.0 KiB
LLVM
82 lines
2.0 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s -check-prefix=LINUX
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; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s -check-prefix=DARWIN
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
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; Variable memcpy's should lower to calls.
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define i8* @test1(i8* %a, i8* %b, i64 %n) nounwind {
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entry:
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tail call void @llvm.memcpy.p0i8.p0i8.i64( i8* %a, i8* %b, i64 %n, i32 1, i1 0 )
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ret i8* %a
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; LINUX: test1:
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; LINUX: memcpy
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}
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; Variable memcpy's should lower to calls.
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define i8* @test2(i64* %a, i64* %b, i64 %n) nounwind {
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entry:
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%tmp14 = bitcast i64* %a to i8*
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%tmp25 = bitcast i64* %b to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp14, i8* %tmp25, i64 %n, i32 8, i1 0 )
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ret i8* %tmp14
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; LINUX: test2:
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; LINUX: memcpy
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}
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; Large constant memcpy's should lower to a call when optimizing for size.
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; PR6623
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; On the other hand, Darwin's definition of -Os is optimizing for size without
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; hurting performance so it should just ignore optsize when expanding memcpy.
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; rdar://8821501
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define void @test3(i8* nocapture %A, i8* nocapture %B) nounwind optsize noredzone {
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entry:
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
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ret void
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; LINUX: test3:
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; LINUX: memcpy
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; DARWIN: test3:
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; DARWIN-NOT: memcpy
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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; DARWIN: movq
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}
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; Large constant memcpy's should be inlined when not optimizing for size.
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define void @test4(i8* nocapture %A, i8* nocapture %B) nounwind noredzone {
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entry:
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
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ret void
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; LINUX: test4:
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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; LINUX movq
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}
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