It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Debugger/SourceFile.cpp b/lib/Debugger/SourceFile.cpp
new file mode 100644
index 0000000..ebea307
--- /dev/null
+++ b/lib/Debugger/SourceFile.cpp
@@ -0,0 +1,76 @@
+//===-- SourceFile.cpp - SourceFile implementation for the debugger -------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the SourceFile class for the LLVM debugger.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Debugger/SourceFile.h"
+#include <cassert>
+
+using namespace llvm;
+
+/// readFile - Load Filename
+///
+void SourceFile::readFile() {
+ std::string ErrMsg;
+ if (!File.map(&ErrMsg))
+ throw ErrMsg;
+}
+
+/// calculateLineOffsets - Compute the LineOffset vector for the current file.
+///
+void SourceFile::calculateLineOffsets() const {
+ assert(LineOffset.empty() && "Line offsets already computed!");
+ const char *BufPtr = File.charBase();
+ const char *FileStart = BufPtr;
+ const char *FileEnd = FileStart + File.size();
+ do {
+ LineOffset.push_back(BufPtr-FileStart);
+
+ // Scan until we get to a newline.
+ while (BufPtr != FileEnd && *BufPtr != '\n' && *BufPtr != '\r')
+ ++BufPtr;
+
+ if (BufPtr != FileEnd) {
+ ++BufPtr; // Skip over the \n or \r
+ if (BufPtr[-1] == '\r' && BufPtr != FileEnd && BufPtr[0] == '\n')
+ ++BufPtr; // Skip over dos/windows style \r\n's
+ }
+ } while (BufPtr != FileEnd);
+}
+
+
+/// getSourceLine - Given a line number, return the start and end of the line
+/// in the file. If the line number is invalid, or if the file could not be
+/// loaded, null pointers are returned for the start and end of the file. Note
+/// that line numbers start with 0, not 1.
+void SourceFile::getSourceLine(unsigned LineNo, const char *&LineStart,
+ const char *&LineEnd) const {
+ LineStart = LineEnd = 0;
+ if (!File.isMapped()) return; // Couldn't load file, return null pointers
+ if (LineOffset.empty()) calculateLineOffsets();
+
+ // Asking for an out-of-range line number?
+ if (LineNo >= LineOffset.size()) return;
+
+ // Otherwise, they are asking for a valid line, which we can fulfill.
+ LineStart = File.charBase()+LineOffset[LineNo];
+
+ if (LineNo+1 < LineOffset.size())
+ LineEnd = File.charBase()+LineOffset[LineNo+1];
+ else
+ LineEnd = File.charBase() + File.size();
+
+ // If the line ended with a newline, strip it off.
+ while (LineEnd != LineStart && (LineEnd[-1] == '\n' || LineEnd[-1] == '\r'))
+ --LineEnd;
+
+ assert(LineEnd >= LineStart && "We somehow got our pointers swizzled!");
+}