1 ; RUN: llc < %s -mtriple=arm64-apple-ios-8.0.0 | FileCheck %s 2 3 declare void @standard_cc_func() 4 declare preserve_mostcc void @preserve_mostcc_func() 5 6 ; Registers r9-r15 should be saved before the call of a function 7 ; with a standard calling convention. 8 define preserve_mostcc void @preserve_mostcc1() nounwind { 9 entry: 10 ;CHECK-LABEL: preserve_mostcc1 11 ;CHECK-NOT: stp 12 ;CHECK-NOT: str 13 ;CHECK: str x15 14 ;CHECK-NEXT: stp x14, x13, 15 ;CHECK-NEXT: stp x12, x11, 16 ;CHECK-NEXT: stp x10, x9, 17 ;CHECK: bl _standard_cc_func 18 call void @standard_cc_func() 19 ;CHECK: ldp x10, x9, 20 ;CHECK-NEXT: ldp x12, x11, 21 ;CHECK-NEXT: ldp x14, x13, 22 ;CHECK-NEXT: ldr x15 23 ret void 24 } 25 26 ; Registers r9-r15 don't need to be saved if one 27 ; function with preserve_mostcc calling convention calls another 28 ; function with preserve_mostcc calling convention, because the 29 ; callee wil save these registers anyways. 30 define preserve_mostcc void @preserve_mostcc2() nounwind { 31 entry: 32 ;CHECK-LABEL: preserve_mostcc2 33 ;CHECK-NOT: x14 34 ;CHECK: stp x29, x30, 35 ;CHECK-NOT: x14 36 ;CHECK: bl _preserve_mostcc_func 37 call preserve_mostcc void @preserve_mostcc_func() 38 ret void 39 } 40 41
