https://bugs.llvm.org/show_bug.cgi?id=37954
Bug ID: 37954
Summary: [debugify] mem2reg fail (ERROR: Instruction with empty
DebugLoc)
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: llvm-bugs@lists.llvm.org
Blocks: 37953
Created attachment 20474
--> https://bugs.llvm.org/attachment.cgi?id=20474&action=edit
xx.ll
Testcase from Stephen Wilks's work on auto test-case generation/reduction. The
test-case originally failed in the loop vectorizer at -O3, but I spotted the
mem2reg failure while trying to get the minimal set of passes to reproduce.
$ clang --version
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
$ clang loop_vectorization.cpp -S -emit-llvm -O0 -Xclang -disable-O0-optnone -o
xx.ll
$ opt xx.ll -disable-output -debugify-each -mem2reg
ERROR: Instruction with empty DebugLoc in function ?baz@@YAXPEAHH@Z --
%bar.addr.0 = phi i32 [ %bar, %entry ], [ %dec, %while.body ], !dbg !28
WARNING: Missing line 1
WARNING: Missing line 2
WARNING: Missing line 3
WARNING: Missing line 4
WARNING: Missing line 6
WARNING: Missing line 8
WARNING: Missing line 11
WARNING: Missing line 12
WARNING: Missing line 13
CheckFunctionDebugify [Promote Memory to Register]: 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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