[lldb] Prefer DW_AT_bit_size over DW_AT_byte_size in GetDIEBitSizeAndSign

Author: dtcxzyw

lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp

@@ -707,9 +707,9 @@ DWARFUnit::GetDIEBitSizeAndSign(uint64_t relative_die_offset) const {
     return llvm::createStringError("cannot resolve DW_OP_convert type DIE");
   uint64_t encoding =
       die.GetAttributeValueAsUnsigned(DW_AT_encoding, DW_ATE_hi_user);
-  uint64_t bit_size = die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8;
+  uint64_t bit_size = die.GetAttributeValueAsUnsigned(DW_AT_bit_size, 0);
   if (!bit_size)
-    bit_size = die.GetAttributeValueAsUnsigned(DW_AT_bit_size, 0);
+    bit_size = die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8;
   if (!bit_size)
     return llvm::createStringError("unsupported type size");
   bool sign;

lldb/test/Shell/SymbolFile/DWARF/print-boolean.c

@@ -0,0 +1,19 @@
+// RUN: %clang_host -O3 -ggdb -o %t %s
+// RUN: %lldb %t \
+// RUN:   -o "b 17" \
+// RUN:   -o r \
+// RUN:   -o "p t" \
+// RUN:   -o exit | FileCheck %s
+
+// CHECK: (lldb) p t
+// CHECK-NEXT: (int) 1
+
+int a, b, c;
+int d(int e) { return e; }
+int main() {
+  int t;
+  c = d(1);
+  t = 1 && c;
+  b = t & a;
+  return 0;
+}