1 ; RUN: llc < %s -march=xcore | FileCheck %s 2 3 ; Optimize memcpy to __memcpy_4 if src, dst and size are all 4 byte aligned. 4 define void @f1(i8* %dst, i8* %src, i32 %n) nounwind { 5 ; CHECK-LABEL: f1: 6 ; CHECK: bl __memcpy_4 7 entry: 8 %0 = shl i32 %n, 2 9 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %0, i32 4, i1 false) 10 ret void 11 } 12 13 ; Can't optimize - size is not a multiple of 4. 14 define void @f2(i8* %dst, i8* %src, i32 %n) nounwind { 15 ; CHECK-LABEL: f2: 16 ; CHECK: bl memcpy 17 entry: 18 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %n, i32 4, i1 false) 19 ret void 20 } 21 22 ; Can't optimize - alignment is not a multiple of 4. 23 define void @f3(i8* %dst, i8* %src, i32 %n) nounwind { 24 ; CHECK-LABEL: f3: 25 ; CHECK: bl memcpy 26 entry: 27 %0 = shl i32 %n, 2 28 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %0, i32 2, i1 false) 29 ret void 30 } 31 32 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind 33
