1 ; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu %s -filetype=obj -o %t 2 ; RUN: llvm-objdump -s %t | FileCheck %s 3 @var = global i32 0 4 5 declare void @bar() 6 7 define i64 @check_largest_class(i32 %in) { 8 %res = load i32* @var 9 call void @bar() 10 %ext = zext i32 %res to i64 11 ret i64 %ext 12 } 13 14 ; The really key points we're checking here are: 15 ; * Return register is x30. 16 ; * Pointer format is 0x1b (GNU doesn't appear to understand others). 17 18 ; The rest is largely incidental, but not expected to change regularly. 19 20 ; Output is: 21 22 ; CHECK: Contents of section .eh_frame: 23 ; CHECK-NEXT: 0000 10000000 00000000 017a5200 017c1e01 .........zR..|.. 24 ; CHECK-NEXT: 0010 1b0c1f00 18000000 18000000 00000000 ................ 25 26 27 ; Won't check the rest, it's rather incidental. 28 ; 0020 24000000 00440c1f 10449e02 93040000 $....D...D...... 29 30 31 ; The first CIE: 32 ; ------------------- 33 ; 10000000: length of first CIE = 0x10 34 ; 00000000: This is a CIE 35 ; 01: version = 0x1 36 ; 7a 52 00: augmentation string "zR" -- pointer format is specified 37 ; 01: code alignment factor 1 38 ; 7c: data alignment factor -4 39 ; 1e: return address register 30 (== x30). 40 ; 01: 1 byte of augmentation 41 ; 1b: pointer format 1b: DW_EH_PE_pcrel | DW_EH_PE_sdata4 42 ; 0c 1f 00: initial instructions: "DW_CFA_def_cfa x31 ofs 0" in this case 43 44 ; Next the FDE: 45 ; ------------- 46 ; 18000000: FDE length 0x18 47 ; 18000000: Uses CIE 0x18 backwards (only coincidentally same as above) 48 ; 00000000: PC begin for this FDE is at 00000000 (relocation is applied here) 49 ; 24000000: FDE applies up to PC begin+0x24 50 ; 00: Augmentation string length 0 for this FDE 51 ; Rest: call frame instructions 52
