[llvm-bugs] [Bug 38177] New: [debugify] mldst-motion fail

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Mon Jul 16 05:47:19 PDT 2018


            Bug ID: 38177
           Summary: [debugify] mldst-motion fail
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: greg.bedwell at sony.com
                CC: llvm-bugs at lists.llvm.org
            Blocks: 37953

Created attachment 20557
  --> https://bugs.llvm.org/attachment.cgi?id=20557&action=edit
ll reproducer

$ clang -v
clang version 7.0.0 (trunk 337152) (llvm/trunk 337156)
Target: x86_64-scei-ps4
Thread model: posix
InstalledDir: e:\work\upstream-llvm\build-vs2015-ps4-ninja\bin

$ cat Debugifind.1.FAIL.MergedLoadStoreMotion.cpp
struct S {
  int foo;
  void fn(int bar);
void S::fn(int bar) {
  if (bar)
    foo = 1;
    foo = 0;

$ clang.exe Debugifind.1.FAIL.MergedLoadStoreMotion.cpp -S -o - -emit-llvm -O0
-Xclang -disable-O0-optnone -o Debugifind.1.FAIL.MergedLoadStoreMotion.ll

$ opt.exe -disable-output -debugify-each -mldst-motion
ERROR: Instruction with empty DebugLoc in function _ZN1S2fnEi --  %.sink = phi
i32 [ 0, %if.else ], [ 1, %if.then ]
WARNING: Missing line 9
WARNING: Missing line 10
CheckFunctionDebugify [MergedLoadStoreMotion]: FAIL
CheckFunctionDebugify [Module Verifier]: PASS


Referenced Bugs:

[Bug 37953] [meta] [debugify] fix -check-debugify failures
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