1# REQUIRES: x86 2# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin19.0.0 -emit-compact-unwind-non-canonical=true %s -o %t.o 3# RUN: %lld -arch x86_64 -dylib %t.o -o %t.dylib 4# RUN: llvm-objdump --macho --syms --unwind-info %t.dylib | FileCheck %s 5 6## Both _f and _g have the same compact unwind encoding, 7## but different stack sizes. So their compact unwindings 8## can't be merged. 9# CHECK: SYMBOL TABLE: 10# CHECK: [[#%x,F:]] g F __TEXT,__text _f 11# CHECK: [[#%x,G:]] g F __TEXT,__text _g 12# CHECK: Number of common encodings in array: 0x1 13# CHECK: Common encodings: (count = 1) 14# CHECK: encoding[0]: 0x03032000 15# CHECK: Second level indices: 16# CHECK: Second level index[0]: 17# CHECK: [0]: function offset=0x[[#%.8x,F]], encoding[0]=0x03032000 18# CHECK: [1]: function offset=0x[[#%.8x,G]], encoding[0]=0x03032000 19 20## Based on compiling 21## int f() { 22## char alloca[3260] = { 0 }; 23## return alloca[0]; 24## } 25## 26## int g() { 27## char alloca[2560] = { 0 }; 28## return alloca[0]; 29## } 30## with `-fomit-frame-pointer -fno-stack-protector -S`. 31.section __TEXT,__text,regular,pure_instructions 32.build_version macos, 10, 15 sdk_version 10, 15, 6 33 34.globl _f 35.p2align 4, 0x90 36_f: 37 .cfi_startproc 38 subq $3272, %rsp 39 .cfi_def_cfa_offset 3280 40 addq $3272, %rsp 41 retq 42 .cfi_endproc 43 44.globl _g 45.p2align 4, 0x90 46_g: 47 .cfi_startproc 48 subq $2568, %rsp 49 .cfi_def_cfa_offset 2576 50 addq $2568, %rsp 51 retq 52 .cfi_endproc 53 54.subsections_via_symbols 55