https://sourceware.org/bugzilla/show_bug.cgi?id=17641
Bug ID: 17641
Summary: [x86-64] Convert load to lea
Product: binutils
Version: 2.26 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: gold
Assignee: ccoutant at google dot com
Reporter: hjl.tools at gmail dot com
CC: ian at airs dot com
For x86-64, gold should convert
mov foo@GOTPCREL(%rip), %reg
to
lea foo(%rip), %reg
if foo is a local symbol, like ld:
[hjl@gnu-6 lea-4]$ cat lea2.s
.text
.type foo, @function
foo:
ret
.size foo, .-foo
.text
.globl bar
.type bar, @function
bar:
movq foo@GOTPCREL(%rip), %rax
.size bar, .-bar
[hjl@gnu-6 lea-4]$ gcc -c lea2.s
[hjl@gnu-6 lea-4]$ ld -shared lea2.o
[hjl@gnu-6 lea-4]$ objdump -dw a.out
a.out: file format elf64-x86-64
Disassembly of section .text:
00000000000001c5 <foo>:
1c5: c3 retq
00000000000001c6 <bar>:
1c6: 48 8d 05 f8 ff ff ff lea -0x8(%rip),%rax # 1c5 <foo>
[hjl@gnu-6 lea-4]$
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