| Issue |
66184
|
| Summary |
[Opt diff]undefined reference to `f2'
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
LRY89757
|
the file before opt can be compiled but can't be linked, , but after `opt -O3`, it can be compiled and linked successfully.
```llvm
; Simplify the CFG of this function without touching the content of loops.
; This only deletes unreachable blocks; preheader/header update is left
; to `cleanup<simplifyCFG>`.
;
; ModuleID = 'example'
target triple = "x86_64-unknown-unknown"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define i32 @f1 (i32 %a, i32 %b) {
entry:
br label %cond_block
cond_block:
%cond = icmp slt i32 %a, 0
br i1 %cond, label %then_block, label %else_block
then_block:
br label %cond_block
else_block:
%a1 = add i32 %a, 1
br label %cond_block
unreachable_block: ; This block is intentionally unreachable
ret i32 %b
}
declare i32 @f2 (i32, i32)
define i32 @main() {
entry:
%a = call i32 @f1(i32 0, i32 1)
%b = call i32 @f2(i32 %a, i32 2)
ret i32 %b
}
```
error:
```
/usr/bin/ld: /home/runyu/projects/JIT-parser/bug_analysis/LoopFusePass_oneshot_0_2.py_LoopFusePass_oneshot_0_no_source_prompt3/exe_before_opt.o: in function `main':
LoopFusePass_oneshot_0_2.py.ll:(.text+0x25): undefined reference to `f2'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
