llvm-6502/test/CodeGen/X86/memcpy.ll

108 lines
2.7 KiB
LLVM

; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=core2 | FileCheck %s -check-prefix=LINUX
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=core2 | FileCheck %s -check-prefix=DARWIN
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
; Variable memcpy's should lower to calls.
define i8* @test1(i8* %a, i8* %b, i64 %n) nounwind {
entry:
tail call void @llvm.memcpy.p0i8.p0i8.i64( i8* %a, i8* %b, i64 %n, i32 1, i1 0 )
ret i8* %a
; LINUX: test1:
; LINUX: memcpy
}
; Variable memcpy's should lower to calls.
define i8* @test2(i64* %a, i64* %b, i64 %n) nounwind {
entry:
%tmp14 = bitcast i64* %a to i8*
%tmp25 = bitcast i64* %b to i8*
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp14, i8* %tmp25, i64 %n, i32 8, i1 0 )
ret i8* %tmp14
; LINUX: test2:
; LINUX: memcpy
}
; Large constant memcpy's should lower to a call when optimizing for size.
; PR6623
; On the other hand, Darwin's definition of -Os is optimizing for size without
; hurting performance so it should just ignore optsize when expanding memcpy.
; rdar://8821501
define void @test3(i8* nocapture %A, i8* nocapture %B) nounwind optsize noredzone {
entry:
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
ret void
; LINUX: test3:
; LINUX: memcpy
; DARWIN: test3:
; DARWIN-NOT: memcpy
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
; DARWIN: movq
}
; Large constant memcpy's should be inlined when not optimizing for size.
define void @test4(i8* nocapture %A, i8* nocapture %B) nounwind noredzone {
entry:
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
ret void
; LINUX: test4:
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
; LINUX: movq
}
@.str = private unnamed_addr constant [30 x i8] c"\00aaaaaaaaaaaaaaaaaaaaaaaaaaaa\00", align 1
define void @test5(i8* nocapture %C) nounwind uwtable ssp {
entry:
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %C, i8* getelementptr inbounds ([30 x i8]* @.str, i64 0, i64 0), i64 16, i32 1, i1 false)
ret void
; DARWIN: test5:
; DARWIN: movabsq $7016996765293437281
; DARWIN: movabsq $7016996765293437184
}
; PR14896
@.str2 = private unnamed_addr constant [2 x i8] c"x\00", align 1
define void @test6() nounwind uwtable {
entry:
; DARWIN: test6
; DARWIN: movw $0, 8
; DARWIN: movq $120, 0
tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* null, i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0), i64 10, i32 1, i1 false)
ret void
}