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| author | George Rimar <grimar@accesssoftek.com> | 2015-11-24 09:00:06 +0000 |
|---|---|---|
| committer | George Rimar <grimar@accesssoftek.com> | 2015-11-24 09:00:06 +0000 |
| commit | 77d1cb1ddf359afd6563f7ccd824b139f11f4acf (patch) | |
| tree | 9e3c9bc9b2b3786d68fbc13a9ba5fe6a0cd5eeda /lld/test | |
| parent | 1938f2eb9832978952f6a6397a5ad40c6338ed6e (diff) | |
| download | bcm5719-llvm-77d1cb1ddf359afd6563f7ccd824b139f11f4acf.tar.gz bcm5719-llvm-77d1cb1ddf359afd6563f7ccd824b139f11f4acf.zip | |
[ELF2] - Optimization for R_X86_64_GOTTPOFF relocation.
R_X86_64_GOTTPOFF is not always requires GOT entries. Some relocations can be converted to local ones.
Differential revision: http://reviews.llvm.org/D14713
llvm-svn: 253966
Diffstat (limited to 'lld/test')
| -rw-r--r-- | lld/test/ELF/tls-opt.s | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lld/test/ELF/tls-opt.s b/lld/test/ELF/tls-opt.s new file mode 100644 index 00000000000..2046d30772c --- /dev/null +++ b/lld/test/ELF/tls-opt.s @@ -0,0 +1,64 @@ +// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o +// RUN: ld.lld %t.o -o %t1 +// RUN: llvm-readobj -r %t1 | FileCheck --check-prefix=NORELOC %s +// RUN: llvm-objdump -d %t1 | FileCheck --check-prefix=DISASM %s + +// NORELOC: Relocations [ +// NORELOC-NEXT: ] + +// DISASM: Disassembly of section .text: +// DISASM-NEXT: _start: +// DISASM-NEXT: 11000: 48 c7 c0 f8 ff ff ff movq $-8, %rax +// DISASM-NEXT: 11007: 49 c7 c7 f8 ff ff ff movq $-8, %r15 +// DISASM-NEXT: 1100e: 48 8d 80 f8 ff ff ff leaq -8(%rax), %rax +// DISASM-NEXT: 11015: 4d 8d bf f8 ff ff ff leaq -8(%r15), %r15 +// DISASM-NEXT: 1101c: 48 81 c4 f8 ff ff ff addq $-8, %rsp +// DISASM-NEXT: 11023: 49 81 c4 f8 ff ff ff addq $-8, %r12 +// DISASM-NEXT: 1102a: 48 c7 c0 fc ff ff ff movq $-4, %rax +// DISASM-NEXT: 11031: 49 c7 c7 fc ff ff ff movq $-4, %r15 +// DISASM-NEXT: 11038: 48 8d 80 fc ff ff ff leaq -4(%rax), %rax +// DISASM-NEXT: 1103f: 4d 8d bf fc ff ff ff leaq -4(%r15), %r15 +// DISASM-NEXT: 11046: 48 81 c4 fc ff ff ff addq $-4, %rsp +// DISASM-NEXT: 1104d: 49 81 c4 fc ff ff ff addq $-4, %r12 + +// Corrupred output: +// DISASM-NEXT: 11054: 48 8d 80 f8 ff ff ff leaq -8(%rax), %rax +// DISASM-NEXT: 1105b: 48 d1 81 c4 f8 ff ff rolq -1852(%rcx) +// DISASM-NEXT: 11062: ff 48 d1 decl -47(%rax) +// DISASM-NEXT: 11065: 81 c4 f8 ff ff ff addl $4294967288, %esp + +.type tls0,@object +.section .tbss,"awT",@nobits +.globl tls0 +.align 4 +tls0: + .long 0 + .size tls0, 4 + +.type tls1,@object +.globl tls1 +.align 4 +tls1: + .long 0 + .size tls1, 4 + +.section .text +.globl _start +_start: + movq tls0@GOTTPOFF(%rip), %rax + movq tls0@GOTTPOFF(%rip), %r15 + addq tls0@GOTTPOFF(%rip), %rax + addq tls0@GOTTPOFF(%rip), %r15 + addq tls0@GOTTPOFF(%rip), %rsp + addq tls0@GOTTPOFF(%rip), %r12 + movq tls1@GOTTPOFF(%rip), %rax + movq tls1@GOTTPOFF(%rip), %r15 + addq tls1@GOTTPOFF(%rip), %rax + addq tls1@GOTTPOFF(%rip), %r15 + addq tls1@GOTTPOFF(%rip), %rsp + addq tls1@GOTTPOFF(%rip), %r12 + + //Invalid input case: + xchgq tls0@gottpoff(%rip),%rax + shlq tls0@gottpoff + rolq tls0@gottpoff |
