33 lines
978 B
LLVM
33 lines
978 B
LLVM
|
; RUN: llc < %s -march=xcore | FileCheck %s
|
||
|
|
|
||
|
|
; Optimize memcpy to __memcpy_4 if src, dst and size are all 4 byte aligned.
|
||
|
|
define void @f1(i8* %dst, i8* %src, i32 %n) nounwind {
|
||
|
|
; CHECK-LABEL: f1:
|
||
|
|
; CHECK: bl __memcpy_4
|
||
|
|
entry:
|
||
|
|
%0 = shl i32 %n, 2
|
||
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dst, i8* align 4 %src, i32 %0, i1 false)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Can't optimize - size is not a multiple of 4.
|
||
|
|
define void @f2(i8* %dst, i8* %src, i32 %n) nounwind {
|
||
|
|
; CHECK-LABEL: f2:
|
||
|
|
; CHECK: bl memcpy
|
||
|
|
entry:
|
||
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dst, i8* align 4 %src, i32 %n, i1 false)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Can't optimize - alignment is not a multiple of 4.
|
||
|
|
define void @f3(i8* %dst, i8* %src, i32 %n) nounwind {
|
||
|
|
; CHECK-LABEL: f3:
|
||
|
|
; CHECK: bl memcpy
|
||
|
|
entry:
|
||
|
|
%0 = shl i32 %n, 2
|
||
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %dst, i8* align 2 %src, i32 %0, i1 false)
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
|