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Fix llc crash on invalid input.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98369 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-03-12 19:18:30 +00:00
parent 1c95488880
commit b45fb90b20
2 changed files with 27 additions and 0 deletions
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7
lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
View File

@ -358,6 +358,13 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
} else
printOperand(MI, 0);
} else {
if (MI->getOperand(0).getType()==MachineOperand::MO_Register &&
MI->getOperand(0).getReg()==0) {
// Suppress offset in this case, it is not meaningful.
O << "undef";
OutStreamer.AddBlankLine();
return;
}
// Frame address. Currently handles register +- offset only.
assert(MI->getOperand(0).getType()==MachineOperand::MO_Register);
assert(MI->getOperand(3).getType()==MachineOperand::MO_Immediate);

20
test/DebugInfo/2010-03-12-llc-crash.ll Normal file
View File

@ -0,0 +1,20 @@
; RUN: llc -O0 < %s -o /dev/null
; llc should not crash on this invalid input.
; PR6588
declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
define void @foo() {
entry:
call void @llvm.dbg.declare(metadata !{i32* undef}, metadata !0)
ret void
}
!0 = metadata !{i32 524545, metadata !1, metadata !"sy", metadata !2, i32 890, metadata !7} ; [ DW_TAG_arg_variable ]
!1 = metadata !{i32 524334, i32 0, metadata !2, metadata !"foo", metadata !"foo", metadata !"foo", metadata !2, i32 892, metadata !4, i1 false, i1 true, i32 0, i32 0, null, i1 false} ; [ DW_TAG_subprogram ]
!2 = metadata !{i32 524329, metadata !"qpainter.h", metadata !"QtGui", metadata !3} ; [ DW_TAG_file_type ]
!3 = metadata !{i32 524305, i32 0, i32 4, metadata !"splineeditor.cpp", metadata !"editor", metadata !"clang 1.1", i1 true, i1 false, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
!4 = metadata !{i32 524309, metadata !5, metadata !"", metadata !5, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null} ; [ DW_TAG_subroutine_type ]
!5 = metadata !{i32 524329, metadata !"splineeditor.cpp", metadata !"src", metadata !3} ; [ DW_TAG_file_type ]
!6 = metadata !{null}
!7 = metadata !{i32 524324, metadata !5, metadata !"int", metadata !5, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]