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Verifier: Check debug info intrinsic arguments

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Verify that debug info intrinsic arguments are valid.  (These checks
will not recurse through the full debug info graph, so they don't need
to be cordoned of in `DebugInfoVerifier`.)

With those checks in place, changing the `DbgIntrinsicInst` accessors to
downcast to `MDLocalVariable` and `MDExpression` is natural (added isa
specializations in `Metadata.h` to support this).

Added tests to `test/Verifier` for the new -verify checks, and fixed the
debug info in all the in-tree tests.

If you have out-of-tree testcases that have started to fail to -verify,
hopefully the verify checks are helpful.  The most likely problem is
that the expression argument is `!{}` (instead of `!MDExpression()`).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232296 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-03-15 01:21:30 +00:00
parent 48248ac8a0
commit 08e687e684
30 changed files with 210 additions and 88 deletions
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8
test/Transforms/Mem2Reg/ConvertDebugInfo2.ll
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@@ -11,14 +11,14 @@ entry:
%z_addr.i = alloca i8* ; <i8**> [#uses=2]
%a_addr = alloca i32 ; <i32*> [#uses=2]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
call void @llvm.dbg.declare(metadata i32* %a_addr, metadata !0, metadata !{}), !dbg !7
call void @llvm.dbg.declare(metadata i32* %a_addr, metadata !0, metadata !MDExpression()), !dbg !7
store i32 %a, i32* %a_addr
%0 = load i32, i32* %a_addr, align 4, !dbg !8 ; <i32> [#uses=1]
call void @llvm.dbg.declare(metadata i32* %x_addr.i, metadata !9, metadata !{}) nounwind, !dbg !15
call void @llvm.dbg.declare(metadata i32* %x_addr.i, metadata !9, metadata !MDExpression()) nounwind, !dbg !15
store i32 %0, i32* %x_addr.i
call void @llvm.dbg.declare(metadata i64* %y_addr.i, metadata !16, metadata !{}) nounwind, !dbg !15
call void @llvm.dbg.declare(metadata i64* %y_addr.i, metadata !16, metadata !MDExpression()) nounwind, !dbg !15
store i64 55, i64* %y_addr.i
call void @llvm.dbg.declare(metadata i8** %z_addr.i, metadata !17, metadata !{}) nounwind, !dbg !15
call void @llvm.dbg.declare(metadata i8** %z_addr.i, metadata !17, metadata !MDExpression()) nounwind, !dbg !15
store i8* bitcast (void (i32)* @baz to i8*), i8** %z_addr.i
%1 = load i32, i32* %x_addr.i, align 4, !dbg !18 ; <i32> [#uses=1]
%2 = load i64, i64* %y_addr.i, align 8, !dbg !18 ; <i64> [#uses=1]