IR: Allow 32-bits for lines in debug location

Remove unnecessary restriction of 24-bits for line numbers in
`MDLocation`.

The rest of the debug info schema (with the exception of local
variables) uses 32-bits for line numbers.  As I introduce the
specialized nodes, it makes sense to canonicalize on one size or the
other.

llvm-svn: 228455

2 files changed, 2 insertions, 10 deletions

diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index 65627097fdf..6bf3d803a21 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -2946,7 +2946,7 @@ struct MDUnsignedField : public MDFieldImpl<uint64_t> {
       : ImplTy(Default), Max(Max) {}
 };
 struct LineField : public MDUnsignedField {
-  LineField() : MDUnsignedField(0, UINT32_MAX >> 8) {}
+  LineField() : MDUnsignedField(0, UINT32_MAX) {}
 };
 struct ColumnField : public MDUnsignedField {
   ColumnField() : MDUnsignedField(0, UINT16_MAX) {}
diff --git a/llvm/lib/IR/DebugInfoMetadata.cpp b/llvm/lib/IR/DebugInfoMetadata.cpp
index 467d21ad36a..c540cc45a61 100644
--- a/llvm/lib/IR/DebugInfoMetadata.cpp
+++ b/llvm/lib/IR/DebugInfoMetadata.cpp
@@ -24,19 +24,12 @@ MDLocation::MDLocation(LLVMContext &C, StorageType Storage, unsigned Line,
          "Expected a scope and optional inlined-at");
 
   // Set line and column.
-  assert(Line < (1u << 24) && "Expected 24-bit line");
   assert(Column < (1u << 16) && "Expected 16-bit column");
 
   SubclassData32 = Line;
   SubclassData16 = Column;
 }
 
-static void adjustLine(unsigned &Line) {
-  // Set to unknown on overflow.  Still use 24 bits for now.
-  if (Line >= (1u << 24))
-    Line = 0;
-}
-
 static void adjustColumn(unsigned &Column) {
   // Set to unknown on overflow.  We only have 16 bits to play with here.
   if (Column >= (1u << 16))
@@ -47,8 +40,7 @@ MDLocation *MDLocation::getImpl(LLVMContext &Context, unsigned Line,
                                 unsigned Column, Metadata *Scope,
                                 Metadata *InlinedAt, StorageType Storage,
                                 bool ShouldCreate) {
-  // Fixup line/column.
-  adjustLine(Line);
+  // Fixup column.
   adjustColumn(Column);
 
   if (Storage == Uniqued) {