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| author | Devang Patel <dpatel@apple.com> | 2011-02-15 17:56:09 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2011-02-15 17:56:09 +0000 |
| commit | d12c0a2764ac85000eb89aa5d8d7d4ef4ac8f4a4 (patch) | |
| tree | 8e967077bbe2b656f6c0eb7c968c2eca36eab902 | |
| parent | 10b2368e9f90898888300748f96bba6a566e283e (diff) | |
| download | bcm5719-llvm-d12c0a2764ac85000eb89aa5d8d7d4ef4ac8f4a4.tar.gz bcm5719-llvm-d12c0a2764ac85000eb89aa5d8d7d4ef4ac8f4a4.zip | |
Ignore DBG_VALUE machine instructions while constructing instruction ranges based on location info.
Machine instruction range consisting of only DBG_VALUE MIs only contributes consecutive labels in assembly output, which is harmless, and empty scope entry in DebugInfo, which confuses debugger tools.
llvm-svn: 125577
| -rw-r--r-- | llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 4 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/dbg-value-range.ll | 4 |
2 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp index 0ecb3dfd196..3c284bfd91e 100644 --- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp @@ -2708,6 +2708,10 @@ bool DwarfDebug::extractScopeInformation() { continue; } + // Ignore DBG_VALUE. It does not contribute any instruction in output. + if (MInsn->isDebugValue()) + continue; + if (RangeBeginMI) { // If we have alread seen a beginning of a instruction range and // current instruction scope does not match scope of first instruction diff --git a/llvm/test/CodeGen/X86/dbg-value-range.ll b/llvm/test/CodeGen/X86/dbg-value-range.ll index ff7f8c64214..2985224d9db 100644 --- a/llvm/test/CodeGen/X86/dbg-value-range.ll +++ b/llvm/test/CodeGen/X86/dbg-value-range.ll @@ -44,12 +44,12 @@ declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone ; check that variable bar:b value range is appropriately trucated in debug info. Here Ltmp5 is end of ; location range. -;CHECK:Ltmp7 +;CHECK:Ltmp6 ;CHECK-NEXT: DEBUG_VALUE: bar:b <- undef ;CHECK:Ldebug_loc0: ;CHECK-NEXT: .quad Ltmp -;CHECK-NEXT: .quad Ltmp7 +;CHECK-NEXT: .quad Ltmp6 ;CHECK-NEXT: .short 1 ;CHECK-NEXT: .byte 85 ;CHECK-NEXT: .quad 0 |
