https://bugs.llvm.org/show_bug.cgi?id=40624
Bug ID: 40624
Summary: -mlong-calls generates non-PIC code on ARM
Product: new-bugs
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: mh+l...@glandium.org
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org
With the following source:
```
extern __attribute__((visibility("hidden"))) int foo();
int bar() { return foo(); };
```
clang generates the following with -fPIC -mlong-calls -O3
--target=armv7a-linux-gnueabi:
```
bar:
ldr r0, .LCPI0_0
bx r0
.LCPI0_0:
.long foo
```
That is not PIC, as that .LCPI0_0 label is in .text.
GCC generates the following:
```
bar:
ldr r3, .L3
.LPIC0:
add r3, pc, r3
bx r3
.L3:
.word foo-(.LPIC0+8)
```
(All courtesy of godbolt)
https://godbolt.org/z/gKwbiO
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