https://bugs.llvm.org/show_bug.cgi?id=37961
Bug ID: 37961
Summary: [debugify] simplifycfg fail
Product: new-bugs
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: greg.bedw...@sony.com
CC: anastasis.gra...@gmail.com, dav...@freebsd.org,
llvm-bugs@lists.llvm.org, v...@apple.com
Blocks: 37953
Created attachment 20479
--> https://bugs.llvm.org/attachment.cgi?id=20479&action=edit
ll reproducer
$ clang -v
clang version 7.0.0 (trunk 335708) (llvm/trunk 335721)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: e:\work\upstream-llvm\build-vs2015-native-ninja\bin
$ cat simplify_the_cfg.cpp
void foo(int bar, int baz) {
for (;; bar++)
for (; bar; bar++)
if (baz)
;
}
$ clang simplify_the_cfg.cpp -O0 -Xclang -disable-O0-optnone -S -emit-llvm -o -
| opt -simplifycfg -instcombine -S -o simplifycfg-input.ll
$ opt simplifycfg-input.ll -disable-output -debugify-each -simplifycfg
ERROR: Instruction with empty DebugLoc in function ?foo@@YAXHH@Z -- %0 = load
i32, i32* %bar.addr, align 4, !dbg !30
ERROR: Instruction with empty DebugLoc in function ?foo@@YAXHH@Z -- %inc4 =
add nsw i32 %0, 1, !dbg !30
WARNING: Missing line 9
WARNING: Missing line 10
WARNING: Missing line 11
WARNING: Missing line 12
WARNING: Missing line 13
WARNING: Missing line 14
WARNING: Missing variable 5
WARNING: Missing variable 6
WARNING: Missing variable 7
WARNING: Missing variable 8
CheckFunctionDebugify [Simplify the CFG]: FAIL
CheckFunctionDebugify [Module Verifier]: PASS
$
Referenced Bugs:
https://bugs.llvm.org/show_bug.cgi?id=37953
[Bug 37953] [meta] [debugify] fix -check-debugify failures
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