https://sourceware.org/bugzilla/show_bug.cgi?id=29077
Bug ID: 29077
Summary: RISCV: .align directive disables secondary relaxations
Product: binutils
Version: 2.38
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: patrick at rivosinc dot com
Target Milestone: ---
Adding a .align directive to an assembly file disables relaxations that are
enabled by other relaxations:
.text
foo:
jr ra
.zero 1048560
bar:
jr ra
.globl _start
_start:
call bar
call foo
jr ra
.align 3
With .align 3:
Disassembly of section .text:
00000000000100b0 <foo>:
100b0: 00008067 ret
...
00000000001100a4 <bar>:
1100a4: 00008067 ret
00000000001100a8 <_start>:
1100a8: ffdff0ef jal ra,1100a4 <bar>
1100ac: fff00097 auipc ra,0xfff00
1100b0: 004080e7 jalr 4(ra) # 100b0 <foo>
1100b4: 00008067 ret
Without .align 3:
Disassembly of section .text:
00000000000100b0 <foo>:
100b0: 00008067 ret
...
00000000001100a4 <bar>:
1100a4: 00008067 ret
00000000001100a8 <_start>:
1100a8: ffdff0ef jal ra,1100a4 <bar>
1100ac: 804000ef jal ra,100b0 <foo>
1100b0: 00008067 ret
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