[llvm] [BOLT] Fix long jump negative offset issue. (PR #67132)

[Vladislav Khmelevsky via llvm-commits]

================
@@ -0,0 +1,111 @@
+# This test checks long call negative offset boundary(0x8000000) for aarch64.
+
+# REQUIRES: system-linux
+
+# RUN: %clang %s -o %t.exe -nostartfiles -fuse-ld=lld -Wl,-z,now,-q \
+# RUN:   -Wl,--script=%p/Inputs/long-jmp-offset-boundary.ld
+# RUN: llvm-bolt %t.exe -o %t.bolt.exe -skip-funcs="foo.*"
+# RUN: llvm-objdump -d %t.bolt.exe | FileCheck %s
+# CHECK: 0000000000000100 <foo>:
+# CHECK: 8000100: {{.*}}	bl	0x100 <foo>
+
+	.text
+	.section	foo_section,"ax", at progbits
+	.globl	foo
+	.p2align	2
+	.type	foo, at function
+foo:
+	.cfi_startproc
+// %bb.0:
+	ret
+.Lfunc_end0:
+	.size	foo, .Lfunc_end0-foo
+	.cfi_endproc
+
+	.section	main_section,"ax", at progbits
+	.globl	main                            // -- Begin function main
+	.p2align	2
+	.type	main, at function
+main:
+	.cfi_startproc
+// %bb.0:
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+	ldr	w0, [sp, #8]
+	ldr	w1, [sp, #4]
+
+	mov	w8, #100
+	str	w8, [sp, #8]
+	mov	w8, #200
+	str	w8, [sp, #4]
+
+	bl	foo
+	ret
+.Lfunc_end1:
+	.size	main, .Lfunc_end1-main
----------------
yota9 wrote:

JFYI you may just use .size main, .-main

https://github.com/llvm/llvm-project/pull/67132