diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -78,7 +78,10 @@
 - No longer crash when specifying a variably-modified parameter type in a
   function with the ``naked`` attribute. This fixes
   `Issue 50541 <https://github.com/llvm/llvm-project/issues/50541>`_.
-
+- The builtin function __builtin_dump_struct would crash clang when the target 
+  struct have bitfield. Now it fixed, and __builtin_dump_struct support dump
+  the bitwidth of bitfields.
+  This fixes `Issue 54462 <https://github.com/llvm/llvm-project/issues/54462>`_.
 
 Improvements to Clang's diagnostics
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -134,6 +137,12 @@
 - The ``__declspec(naked)`` attribute can no longer be written on a member
   function in Microsoft compatibility mode, matching the behavior of cl.exe.
 
+- Improve __builtin_dump_struct:
+
+  - Support bitfields in struct and union.
+  
+  - Improve the dump format, dump both bitwidth(if its a bitfield) and field value.
+
 Windows Support
 ---------------
 
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -2044,7 +2044,7 @@
 }
 
 static llvm::Value *dumpRecord(CodeGenFunction &CGF, QualType RType,
-                               Value *&RecordPtr, CharUnits Align,
+                               LValue RecordLV, CharUnits Align,
                                llvm::FunctionCallee Func, int Lvl) {
   ASTContext &Context = CGF.getContext();
   RecordDecl *RD = RType->castAs<RecordType>()->getDecl()->getDefinition();
@@ -2077,47 +2077,60 @@
   }
 
   for (const auto *FD : RD->fields()) {
-    Value *FieldPtr = RecordPtr;
-    if (RD->isUnion())
-      FieldPtr = CGF.Builder.CreatePointerCast(
-          FieldPtr, CGF.ConvertType(Context.getPointerType(FD->getType())));
-    else
-      FieldPtr = CGF.Builder.CreateStructGEP(CGF.ConvertType(RType), FieldPtr,
-                                             FD->getFieldIndex());
-
-    GString = CGF.Builder.CreateGlobalStringPtr(
-        llvm::Twine(Pad)
-            .concat(FD->getType().getAsString())
-            .concat(llvm::Twine(' '))
-            .concat(FD->getNameAsString())
-            .concat(" : ")
-            .str());
-    Value *TmpRes = CGF.Builder.CreateCall(Func, {GString});
-    Res = CGF.Builder.CreateAdd(Res, TmpRes);
+    Value *TmpRes = nullptr;
+
+    std::string Format = llvm::Twine(Pad)
+                             .concat(FD->getType().getAsString())
+                             .concat(llvm::Twine(' '))
+                             .concat(FD->getNameAsString())
+                             .str();
+
+    if (FD->isBitField()) {
+      unsigned BitfieldWidth = FD->getBitWidthValue(CGF.getContext());
+
+      // If current field is a unnamed bitfield, we should dump only one ' '
+      // between type-name and ':'
+      if (!FD->getDeclName().isEmpty())
+        Format += ' ';
+      Format += llvm::Twine(": ").concat(llvm::Twine(BitfieldWidth)).str();
+
+      // If current field is a zero-width bitfield, we just dump a string like
+      // 'type-name : 0'
+      if (FD->isZeroSize(CGF.getContext())) {
+        Format += "\n";
+        GString = CGF.Builder.CreateGlobalStringPtr(Format);
+        TmpRes = CGF.Builder.CreateCall(Func, {GString});
+        Res = CGF.Builder.CreateAdd(Res, TmpRes);
+        continue;
+      }
+    }
 
+    LValue FieldLV = CGF.EmitLValueForField(RecordLV, FD);
     QualType CanonicalType =
         FD->getType().getUnqualifiedType().getCanonicalType();
 
     // We check whether we are in a recursive type
     if (CanonicalType->isRecordType()) {
-      TmpRes = dumpRecord(CGF, CanonicalType, FieldPtr, Align, Func, Lvl + 1);
+      TmpRes = dumpRecord(CGF, CanonicalType, FieldLV, Align, Func, Lvl + 1);
       Res = CGF.Builder.CreateAdd(TmpRes, Res);
       continue;
     }
 
     // We try to determine the best format to print the current field
-    llvm::Twine Format = Types.find(CanonicalType) == Types.end()
-                             ? Types[Context.VoidPtrTy]
-                             : Types[CanonicalType];
-
-    Address FieldAddress =
-        Address(FieldPtr, CGF.ConvertTypeForMem(FD->getType()), Align);
-    FieldPtr = CGF.Builder.CreateLoad(FieldAddress);
-
-    // FIXME Need to handle bitfield here
-    GString = CGF.Builder.CreateGlobalStringPtr(
-        Format.concat(llvm::Twine('\n')).str());
-    TmpRes = CGF.Builder.CreateCall(Func, {GString, FieldPtr});
+    const char *TypeFormat = Types.find(CanonicalType) == Types.end()
+                                 ? Types[Context.VoidPtrTy]
+                                 : Types[CanonicalType];
+
+    GString = CGF.Builder.CreateGlobalStringPtr(llvm::Twine(Format)
+                                                    .concat(" = ")
+                                                    .concat(TypeFormat)
+                                                    .concat(llvm::Twine('\n'))
+                                                    .str());
+
+    RValue RV = FD->isBitField()
+                    ? CGF.EmitLoadOfBitfieldLValue(FieldLV, FD->getLocation())
+                    : CGF.EmitLoadOfLValue(FieldLV, FD->getLocation());
+    TmpRes = CGF.Builder.CreateCall(Func, {GString, RV.getScalarVal()});
     Res = CGF.Builder.CreateAdd(Res, TmpRes);
   }
 
@@ -2664,7 +2677,8 @@
     QualType Arg0Type = Arg0->getType()->getPointeeType();
 
     Value *RecordPtr = EmitScalarExpr(Arg0);
-    Value *Res = dumpRecord(*this, Arg0Type, RecordPtr, Arg0Align,
+    LValue RecordLV = MakeAddrLValue(RecordPtr, Arg0Type, Arg0Align);
+    Value *Res = dumpRecord(*this, Arg0Type, RecordLV, Arg0Align,
                             {LLVMFuncType, Func}, 0);
     return RValue::get(Res);
   }
diff --git a/clang/test/CodeGen/dump-struct-builtin.c b/clang/test/CodeGen/dump-struct-builtin.c
--- a/clang/test/CodeGen/dump-struct-builtin.c
+++ b/clang/test/CodeGen/dump-struct-builtin.c
@@ -4,114 +4,95 @@
 #include <stdint.h>
 
 // CHECK: @__const.unit1.a = private unnamed_addr constant %struct.U1A { i16 12 }, align 2
-// CHECK-NEXT: [[STRUCT_STR_U1:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U1A {\0A\00"
-// CHECK-NEXT: [[FIELD_U1:@[0-9]+]] = private unnamed_addr constant [11 x i8] c"short a : \00"
-// CHECK-NEXT: [[FORMAT_U1:@[0-9]+]] = private unnamed_addr constant [5 x i8] c"%hd\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U1:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U1:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U1A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U1:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"short a = %hd\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U1:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit2.a = private unnamed_addr constant %struct.U2A { i16 12 }, align 2
-// CHECK-NEXT: [[STRUCT_STR_U2:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U2A {\0A\00"
-// CHECK-NEXT: [[FIELD_U2:@[0-9]+]] = private unnamed_addr constant [20 x i8] c"unsigned short a : \00"
-// CHECK-NEXT: [[FORMAT_U2:@[0-9]+]] = private unnamed_addr constant [5 x i8] c"%hu\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U2:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U2:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U2A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U2:@[0-9]+]] = private unnamed_addr constant [24 x i8] c"unsigned short a = %hu\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U2:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit3.a = private unnamed_addr constant %struct.U3A { i32 12 }, align 4
-// CHECK-NEXT: [[STRUCT_STR_U3:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U3A {\0A\00"
-// CHECK-NEXT: [[FIELD_U3:@[0-9]+]] = private unnamed_addr constant [9 x i8] c"int a : \00"
-// CHECK-NEXT: [[FORMAT_U3:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%d\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U3:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U3:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U3A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U3:@[0-9]+]] = private unnamed_addr constant [12 x i8] c"int a = %d\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U3:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit4.a = private unnamed_addr constant %struct.U4A { i32 12 }, align 4
-// CHECK-NEXT: [[STRUCT_STR_U4:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U4A {\0A\00"
-// CHECK-NEXT: [[FIELD_U4:@[0-9]+]] = private unnamed_addr constant [18 x i8] c"unsigned int a : \00"
-// CHECK-NEXT: [[FORMAT_U4:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%u\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U4:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U4:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U4A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U4:@[0-9]+]] = private unnamed_addr constant [21 x i8] c"unsigned int a = %u\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U4:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit5.a = private unnamed_addr constant %struct.U5A { i64 12 }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U5:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U5A {\0A\00"
-// CHECK-NEXT: [[FIELD_U5:@[0-9]+]] = private unnamed_addr constant [10 x i8] c"long a : \00"
-// CHECK-NEXT: [[FORMAT_U5:@[0-9]+]] = private unnamed_addr constant [5 x i8] c"%ld\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U5:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U5:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U5A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U5:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"long a = %ld\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U5:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit6.a = private unnamed_addr constant %struct.U6A { i64 12 }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U6:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U6A {\0A\00"
-// CHECK-NEXT: [[FIELD_U6:@[0-9]+]] = private unnamed_addr constant [19 x i8] c"unsigned long a : \00"
-// CHECK-NEXT: [[FORMAT_U6:@[0-9]+]] = private unnamed_addr constant [5 x i8] c"%lu\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U6:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U6:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U6A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U6:@[0-9]+]] = private unnamed_addr constant [23 x i8] c"unsigned long a = %lu\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U6:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit7.a = private unnamed_addr constant %struct.U7A { i64 12 }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U7:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U7A {\0A\00"
-// CHECK-NEXT: [[FIELD_U7:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"long long a : \00"
-// CHECK-NEXT: [[FORMAT_U7:@[0-9]+]] = private unnamed_addr constant [6 x i8] c"%lld\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U7:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U7:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U7A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U7:@[0-9]+]] = private unnamed_addr constant [20 x i8] c"long long a = %lld\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U7:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit8.a = private unnamed_addr constant %struct.U8A { i64 12 }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U8:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U8A {\0A\00"
-// CHECK-NEXT: [[FIELD_U8:@[0-9]+]] = private unnamed_addr constant [24 x i8] c"unsigned long long a : \00"
-// CHECK-NEXT: [[FORMAT_U8:@[0-9]+]] = private unnamed_addr constant [6 x i8] c"%llu\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U8:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U8:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U8A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U8:@[0-9]+]] = private unnamed_addr constant [29 x i8] c"unsigned long long a = %llu\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U8:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit9.a = private unnamed_addr constant %struct.U9A { i8 97 }, align 1
-// CHECK-NEXT: [[STRUCT_STR_U9:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U9A {\0A\00"
-// CHECK-NEXT: [[FIELD_U9:@[0-9]+]] = private unnamed_addr constant [10 x i8] c"char a : \00"
-// CHECK-NEXT: [[FORMAT_U9:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%c\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U9:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U9:@[0-9]+]] = private unnamed_addr constant [14 x i8] c"struct U9A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U9:@[0-9]+]] = private unnamed_addr constant [13 x i8] c"char a = %c\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U9:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @.str = private unnamed_addr constant [4 x i8] c"LSE\00", align 1
-
 // CHECK: @__const.unit10.a = private unnamed_addr constant %struct.U10A { i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0) }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U10:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U10A {\0A\00"
-// CHECK-NEXT: [[FIELD_U10:@[0-9]+]] = private unnamed_addr constant [12 x i8] c"char * a : \00"
-// CHECK-NEXT: [[FORMAT_U10:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%s\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U10:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U10:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U10A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U10:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"char * a = %s\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U10:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit11.a = private unnamed_addr constant %struct.U11A { i8* inttoptr (i64 305419896 to i8*) }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U11:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U11A {\0A\00"
-// CHECK-NEXT: [[FIELD_U11:@[0-9]+]] = private unnamed_addr constant [12 x i8] c"void * a : \00"
-// CHECK-NEXT: [[FORMAT_U11:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%p\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U11:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U11:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U11A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U11:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"void * a = %p\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U11:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit12.a = private unnamed_addr constant %struct.U12A { i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0) }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U12:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U12A {\0A\00"
-// CHECK-NEXT: [[FIELD_U12:@[0-9]+]] = private unnamed_addr constant [18 x i8] c"const char * a : \00"
-// CHECK-NEXT: [[FORMAT_U12:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%s\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U12:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U12:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U12A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U12:@[0-9]+]] = private unnamed_addr constant [21 x i8] c"const char * a = %s\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U12:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit13.a = private unnamed_addr constant %struct.U13A { i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0) }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U13:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U13A {\0A\00"
-// CHECK-NEXT: [[FIELD_U13:@[0-9]+]] = private unnamed_addr constant [20 x i8] c"const charstar a : \00"
-// CHECK-NEXT: [[FORMAT_U13:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%s\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U13:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U13:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U13A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U13:@[0-9]+]] = private unnamed_addr constant [23 x i8] c"const charstar a = %s\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U13:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit14.a = private unnamed_addr constant %struct.U14A { double 0x3FF1F9ACFFA7EB6C }, align 8
-// CHECK-NEXT: [[STRUCT_STR_U14:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U14A {\0A\00"
-// CHECK-NEXT: [[FIELD_U14:@[0-9]+]] = private unnamed_addr constant [12 x i8] c"double a : \00"
-// CHECK-NEXT: [[FORMAT_U14:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%f\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U14:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U14:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U14A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U14:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"double a = %f\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U14:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit15.a = private unnamed_addr constant %struct.U15A { [3 x i32] [i32 1, i32 2, i32 3] }, align 4
-// CHECK-NEXT: [[STRUCT_STR_U15:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U15A {\0A\00"
-// CHECK-NEXT: [[FIELD_U15:@[0-9]+]] = private unnamed_addr constant [12 x i8] c"int[3] a : \00"
-// CHECK-NEXT: [[FORMAT_U15:@[0-9]+]] = private unnamed_addr constant [4 x i8] c"%p\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U15:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U15:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U15A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U15:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"int[3] a = %p\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U15:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit16.a = private unnamed_addr constant %struct.U16A { i8 12 }, align 1
-// CHECK-NEXT: [[STRUCT_STR_U16:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U16A {\0A\00"
-// CHECK-NEXT: [[FIELD_U16:@[0-9]+]] = private unnamed_addr constant [13 x i8] c"uint8_t a : \00"
-// CHECK-NEXT: [[FORMAT_U16:@[0-9]+]] = private unnamed_addr constant [6 x i8] c"%hhu\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U16:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U16:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U16A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U16:@[0-9]+]] = private unnamed_addr constant [18 x i8] c"uint8_t a = %hhu\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U16:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit17.a = private unnamed_addr constant %struct.U17A { i8 12 }, align 1
-// CHECK-NEXT: [[STRUCT_STR_U17:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U17A {\0A\00"
-// CHECK-NEXT: [[FIELD_U17:@[0-9]+]] = private unnamed_addr constant [12 x i8] c"int8_t a : \00"
-// CHECK-NEXT: [[FORMAT_U17:@[0-9]+]] = private unnamed_addr constant [6 x i8] c"%hhd\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U17:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U17:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U17A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U17:@[0-9]+]] = private unnamed_addr constant [17 x i8] c"int8_t a = %hhd\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U17:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 // CHECK: @__const.unit18.a = private unnamed_addr constant %struct.U18A { x86_fp80 0xK3FFF8FCD67FD3F5B6000 }, align 16
-// CHECK-NEXT: [[STRUCT_STR_U18:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U18A {\0A\00"
-// CHECK-NEXT: [[FIELD_U18:@[0-9]+]] = private unnamed_addr constant [17 x i8] c"long double a : \00"
-// CHECK-NEXT: [[FORMAT_U18:@[0-9]+]] = private unnamed_addr constant [5 x i8] c"%Lf\0A\00"
-// CHECK-NEXT: [[END_STRUCT_U18:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00"
+// CHECK-NEXT: [[STRUCT_STR_U18:@[0-9]+]] = private unnamed_addr constant [15 x i8] c"struct U18A {\0A\00", align 1
+// CHECK-NEXT: [[FIELD_U18:@[0-9]+]] = private unnamed_addr constant [21 x i8] c"long double a = %Lf\0A\00", align 1
+// CHECK-NEXT: [[END_STRUCT_U18:@[0-9]+]] = private unnamed_addr constant [3 x i8] c"}\0A\00", align 1
 
 int printf(const char *fmt, ...) {
     return 0;
@@ -126,10 +107,9 @@
       .a = 12,
   };
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U1]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U1A, %struct.U1A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* [[FIELD_U1]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U1A, %struct.U1A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i16, i16* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* [[FORMAT_U1]], i32 0, i32 0), i16 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[FIELD_U1]], i32 0, i32 0), i16 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U1]], i32 0, i32 0))
   __builtin_dump_struct(&a, &printf);
 }
@@ -144,10 +124,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U2]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U2A, %struct.U2A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* [[FIELD_U2]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U2A, %struct.U2A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i16, i16* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* [[FORMAT_U2]], i32 0, i32 0), i16 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* [[FIELD_U2]], i32 0, i32 0), i16 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U2]], i32 0, i32 0))
   __builtin_dump_struct(&a, &printf);
 }
@@ -162,10 +141,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U3]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U3A, %struct.U3A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* [[FIELD_U3]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U3A, %struct.U3A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U3]], i32 0, i32 0), i32 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* [[FIELD_U3]], i32 0, i32 0), i32 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U3]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -180,10 +158,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U4]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U4A, %struct.U4A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* [[FIELD_U4]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U4A, %struct.U4A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U4]], i32 0, i32 0), i32 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* [[FIELD_U4]], i32 0, i32 0), i32 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U4]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -198,10 +175,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U5]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U5A, %struct.U5A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* [[FIELD_U5]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U5A, %struct.U5A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i64, i64* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* [[FORMAT_U5]], i32 0, i32 0), i64 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[FIELD_U5]], i32 0, i32 0), i64 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U5]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -216,10 +192,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U6]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U6A, %struct.U6A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* [[FIELD_U6]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U6A, %struct.U6A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i64, i64* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* [[FORMAT_U6]], i32 0, i32 0), i64 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* [[FIELD_U6]], i32 0, i32 0), i64 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U6]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -234,10 +209,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U7]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U7A, %struct.U7A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[FIELD_U7]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U7A, %struct.U7A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i64, i64* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* [[FORMAT_U7]], i32 0, i32 0), i64 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* [[FIELD_U7]], i32 0, i32 0), i64 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U7]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -252,10 +226,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U8]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U8A, %struct.U8A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* [[FIELD_U8]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U8A, %struct.U8A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i64, i64* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* [[FORMAT_U8]], i32 0, i32 0), i64 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* [[FIELD_U8]], i32 0, i32 0), i64 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U8]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -270,10 +243,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* [[STRUCT_STR_U9]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U9A, %struct.U9A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* [[FIELD_U9]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U9A, %struct.U9A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i8, i8* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U9]], i32 0, i32 0), i8 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* [[FIELD_U9]], i32 0, i32 0), i8 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U9]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -288,10 +260,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U10]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U10A, %struct.U10A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* [[FIELD_U10]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U10A, %struct.U10A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U10]], i32 0, i32 0), i8* [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[FIELD_U10]], i32 0, i32 0), i8* [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U10]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -306,10 +277,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U11]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U11A, %struct.U11A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* [[FIELD_U11]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U11A, %struct.U11A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U11]], i32 0, i32 0), i8* [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[FIELD_U11]], i32 0, i32 0), i8* [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U11]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -324,10 +294,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U12]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U12A, %struct.U12A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* [[FIELD_U12]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U12A, %struct.U12A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U12]], i32 0, i32 0), i8* [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* [[FIELD_U12]], i32 0, i32 0), i8* [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U12]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -343,10 +312,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U13]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U13A, %struct.U13A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* [[FIELD_U13]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U13A, %struct.U13A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U13]], i32 0, i32 0), i8* [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* [[FIELD_U13]], i32 0, i32 0), i8* [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U13]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -361,10 +329,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U14]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U14A, %struct.U14A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* [[FIELD_U14]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U14A, %struct.U14A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load double, double* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U14]], i32 0, i32 0), double [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[FIELD_U14]], i32 0, i32 0), double [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U14]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -379,10 +346,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U15]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U15A, %struct.U15A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* [[FIELD_U15]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U15A, %struct.U15A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load [3 x i32], [3 x i32]* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* [[FORMAT_U15]], i32 0, i32 0), [3 x i32] [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[FIELD_U15]], i32 0, i32 0), [3 x i32] [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U15]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -397,10 +363,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U16]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U16A, %struct.U16A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* [[FIELD_U16]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U16A, %struct.U16A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i8, i8* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* [[FORMAT_U16]], i32 0, i32 0), i8 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* [[FIELD_U16]], i32 0, i32 0), i8 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U16]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -415,10 +380,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U17]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U17A, %struct.U17A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* [[FIELD_U17]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U17A, %struct.U17A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i8, i8* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* [[FORMAT_U17]], i32 0, i32 0), i8 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* [[FIELD_U17]], i32 0, i32 0), i8 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U17]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -433,10 +397,9 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* [[STRUCT_STR_U18]], i32 0, i32 0))
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U18A, %struct.U18A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* [[FIELD_U18]], i32 0, i32 0))
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.U18A, %struct.U18A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load x86_fp80, x86_fp80* [[RES1]],
-  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* [[FORMAT_U18]], i32 0, i32 0), x86_fp80 [[LOAD1]])
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* [[FIELD_U18]], i32 0, i32 0), x86_fp80 [[LOAD1]])
   // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* [[END_STRUCT_U18]], i32 0, i32 0)
   __builtin_dump_struct(&a, &printf);
 }
@@ -453,12 +416,10 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.T1A, %struct.T1A* %a, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[RES1:%[a-z0-9]+]] = getelementptr inbounds %struct.T1A, %struct.T1A* %a, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[RES1]],
   // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD1]])
-  // CHECK: [[RES2:%[0-9]+]] = getelementptr inbounds %struct.T1A, %struct.T1A* %a, i32 0, i32 1
-  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[RES2:%[a-z0-9]+]] = getelementptr inbounds %struct.T1A, %struct.T1A* %a, i32 0, i32 1
   // CHECK: [[LOAD2:%[0-9]+]] = load i8*, i8** [[RES2]],
   // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8* [[LOAD2]])
   // CHECK: call i32 (i8*, ...) @printf(
@@ -483,14 +444,12 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.T2B, %struct.T2B* %b, i32 0, i32 0
-  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[RES1:%[a-z0-9]+]] = getelementptr inbounds %struct.T2B, %struct.T2B* %b, i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[RES1]],
   // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD1]])
-  // CHECK: [[NESTED_STRUCT:%[0-9]+]] = getelementptr inbounds %struct.T2B, %struct.T2B* %b, i32 0, i32 1
-  // CHECK: call i32 (i8*, ...) @printf(
-  // CHECK: [[RES2:%[0-9]+]] = getelementptr inbounds %struct.T2A, %struct.T2A* [[NESTED_STRUCT]], i32 0, i32 0
+  // CHECK: [[NESTED_STRUCT:%[a-z0-9]+]] = getelementptr inbounds %struct.T2B, %struct.T2B* %b, i32 0, i32 1
   // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[RES2:%[a-z0-9]+]] = getelementptr inbounds %struct.T2A, %struct.T2A* [[NESTED_STRUCT]], i32 0, i32 0
   // CHECK: [[LOAD2:%[0-9]+]] = load i32, i32* [[RES2]],
   // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD2]])
   // CHECK: call i32 (i8*, ...) @printf(
@@ -510,15 +469,16 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.T3A, %struct.T3A* %a, i32 0, i32 0
+  // CHECK: [[RES1:%[a-z0-9]+]] = getelementptr inbounds %struct.T3A, %struct.T3A* %a, i32 0, i32 0
   // CHECK: call i32 (i8*, ...) @printf(
-  // CHECK: [[BC1:%[0-9]+]] = bitcast %union.anon* [[RES1]] to i32*
+  // CHECK: [[BC1:%[a-z0-9]+]] = bitcast %union.anon* [[RES1]] to i32*
   // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[BC1]],
   // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD1]])
-  // CHECK: [[BC2:%[0-9]+]] = bitcast %union.anon* [[RES1]] to [4 x i8]*
+  // CHECK: [[BC2:%[a-z0-9]+]] = bitcast %union.anon* [[RES1]] to [4 x i8]*
   // CHECK: [[LOAD2:%[0-9]+]] = load [4 x i8], [4 x i8]* [[BC2]],
   // CHECK: call i32 (i8*, ...) @printf({{.*}}, [4 x i8] [[LOAD2]])
   // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: call i32 (i8*, ...) @printf(
   __builtin_dump_struct(&a, &printf);
 }
 
@@ -539,17 +499,141 @@
   };
 
   // CHECK: call i32 (i8*, ...) @printf(
-  // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.T4A, %struct.T4A* %a, i32 0, i32 0
+  // CHECK: [[RES1:%[a-z0-9]+]] = getelementptr inbounds %struct.T4A, %struct.T4A* %a, i32 0, i32 0
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[BC1:%[a-z0-9]+]] = bitcast %union.anon.0* [[RES1]] to %struct.anon*
   // CHECK: call i32 (i8*, ...) @printf(
-  // CHECK: [[BC1:%[0-9]+]] = bitcast %union.anon.0* [[RES1]] to %struct.anon*
-  // CHECK: [[RES2:%[0-9]+]] = getelementptr inbounds %struct.anon, %struct.anon* [[BC1]], i32 0, i32 0
+  // CHECK: [[RES2:%[a-z0-9]+]] = getelementptr inbounds %struct.anon, %struct.anon* [[BC1]], i32 0, i32 0
   // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES2]],
   // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8* [[LOAD1]])
-
-  // CHECK: [[BC2:%[0-9]+]] = bitcast %union.anon.0* [[RES1]] to %struct.anon.1*
-  // CHECK: [[RES3:%[0-9]+]] = getelementptr inbounds %struct.anon.1, %struct.anon.1* [[BC2]], i32 0, i32 0
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[BC2:%[a-z0-9]+]] = bitcast %union.anon.0* [[RES1]] to %struct.anon.1*
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[RES3:%[a-z0-9]+]] = getelementptr inbounds %struct.anon.1, %struct.anon.1* [[BC2]], i32 0, i32 0
   // CHECK: [[LOAD2:%[0-9]+]] = load i64, i64* [[RES3]],
   // CHECK: call i32 (i8*, ...) @printf({{.*}}, i64 [[LOAD2]])
   // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: call i32 (i8*, ...) @printf(
+  __builtin_dump_struct(&a, &printf);
+}
+
+void test5(void) {
+  struct T5A {
+    unsigned a : 1;
+  };
+
+  struct T5A a = {
+    .a = 0,
+  };
+
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* {{.*}}, i32 0, i32 0))
+  // CHECK: [[BC1:%[0-9a-z.]+]] = bitcast %struct.T5A* %a to i8*
+  // CHECK: [[LOAD1:%[0-9a-z.]+]] = load i8, i8* [[BC1]],
+  // CHECK: [[CLEAR1:%[0-9a-z.]+]] = and i8 [[LOAD1]], 1
+  // CHECK: [[CAST1:%[0-9a-z.]+]] = zext i8 [[CLEAR1]] to i32
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* {{.*}}, i32 0, i32 0), i32 [[CAST1]])
+  // CHECK: call i32 (i8*, ...) @printf(
+  __builtin_dump_struct(&a, &printf);
+}
+
+void test6(void) {
+  struct T6A {
+    unsigned a : 1;
+    unsigned b : 1;
+    unsigned c : 1;
+  };
+
+  struct T6A a = {
+    .a = 1,
+    .b = 0,
+    .c = 1,
+  };
+
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[BC1:%[0-9a-z.]+]] = bitcast %struct.T6A* %a to i8*
+  // CHECK: [[LOAD1:%[0-9a-z.]+]] = load i8, i8* [[BC1]],
+  // CHECK: [[CLEAR1:%[0-9a-z.]+]] = and i8 [[LOAD1]], 1
+  // CHECK: [[CAST1:%[0-9a-z.]+]] = zext i8 [[CLEAR1]] to i32
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* {{.*}}, i32 0, i32 0), i32 [[CAST1]])
+  // CHECK: [[BC2:%[0-9a-z.]+]] = bitcast %struct.T6A* %a to i8*
+  // CHECK: [[LOAD2:%[0-9a-z.]+]] = load i8, i8* [[BC2]], align 4
+  // CHECK: [[LSHR2:%[0-9a-z.]+]] = lshr i8 [[LOAD2]], 1
+  // CHECK: [[CLEAR2:%[0-9a-z.]+]] = and i8 [[LSHR2]], 1
+  // CHECK: [[CAST2:%[0-9a-z.]+]] = zext i8 [[CLEAR2]] to i32
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* {{.*}}, i32 0, i32 0), i32 [[CAST2]])
+  // CHECK: [[BC3:%[0-9a-z.]+]] = bitcast %struct.T6A* %a to i8*
+  // CHECK: [[LOAD3:%[0-9a-z.]+]] = load i8, i8* [[BC3]], align 4
+  // CHECK: [[LSHR3:%[0-9a-z.]+]] = lshr i8 [[LOAD3]], 2
+  // CHECK: [[CLEAR3:%[0-9a-z.]+]] = and i8 [[LSHR3]], 1
+  // CHECK: [[CAST3:%[0-9a-z.]+]] = zext i8 [[CLEAR3]] to i32
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* {{.*}}, i32 0, i32 0), i32 [[CAST3]])
+  // CHECK: call i32 (i8*, ...) @printf(
+  __builtin_dump_struct(&a, &printf);
+}
+
+void test7(void) {
+
+  struct T7A {
+    unsigned a : 1;
+  };
+
+  struct T7B {
+    struct T7A a;
+    unsigned b : 1;
+  };
+
+  struct T7B a = {
+    .a = {.a = 0},
+    .b = 1,
+  };
+
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[RES1:%[−a−zA−Z._0-9]+]] = getelementptr inbounds %struct.T7B, %struct.T7B* %a, i32 0, i32 0
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[BC1:%[−a−zA−Z._0-9]+]] = bitcast %struct.T7A* [[RES1]] to i8*
+  // CHECK: [[LOAD1:%[-a-zA-Z._0-9]+]] = load i8, i8* [[BC1]],
+  // CHECK: [[CLEAR1:%[-a-zA-Z._0-9]+]] = and i8 [[LOAD1]], 1
+  // CHECK: [[CAST1:%[-a-zA-Z._0-9]+]] = zext i8 [[CLEAR1]] to i32
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* {{.*}}, i32 0, i32 0), i32 [[CAST1]])
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[RES2:%[-a-zA-Z._0-9]+]] = getelementptr inbounds %struct.T7B, %struct.T7B* %a, i32 0, i32 1
+  // CHECK: [[LOAD2:%[-a-zA-Z._0-9]+]] = load i8, i8* [[RES2]], align 4
+  // CHECK: [[CLEAR2:%[-a-zA-Z._0-9]+]] = and i8 [[LOAD2]], 1
+  // CHECK: [[CAST2:%[-a-zA-Z._0-9]+]] = zext i8 [[CLEAR2]] to i32
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* {{.*}}, i32 0, i32 0), i32 [[CAST2]])
+  // CHECK: call i32 (i8*, ...) @printf(
+   __builtin_dump_struct(&a, &printf);
+}
+
+void test8(void) {
+  struct T8A {
+    unsigned c : 1;
+    unsigned : 3;
+    unsigned : 0;
+    unsigned b;
+  };
+
+  struct T8A a = {
+    .b = 2022,
+  };
+
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[BC1:%[−a−zA−Z._0-9]+]] = bitcast %struct.T8A* %a to i8*
+  // CHECK: [[LOAD1:%[-a-zA-Z._0-9]+]] = load i8, i8* [[BC1]],
+  // CHECK: [[CLEAR1:%[-a-zA-Z._0-9]+]] = and i8 [[LOAD1]], 1
+  // CHECK: [[CAST1:%[-a-zA-Z._0-9]+]] = zext i8 [[CLEAR1]] to i32
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* {{.*}}, i32 0, i32 0), i32 [[CAST1]])
+  // CHECK: [[BC2:%[−a−zA−Z._0-9]+]] = bitcast %struct.T8A* %a to i8*
+  // CHECK: [[LOAD2:%[-a-zA-Z._0-9]+]] = load i8, i8* [[BC2]],
+  // CHECK: [[LSHR2:%[0-9a-z.]+]] = lshr i8 [[LOAD2]], 1
+  // CHECK: [[CLEAR2:%[-a-zA-Z._0-9]+]] = and i8 [[LSHR2]], 7
+  // CHECK: [[CAST2:%[-a-zA-Z._0-9]+]] = zext i8 [[CLEAR2]] to i32
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* {{.*}}, i32 0, i32 0), i32 [[CAST2]])
+  // CHECK: call i32 (i8*, ...) @printf(
+  // CHECK: [[RES3:%[-a-zA-Z._0-9]+]] = getelementptr inbounds %struct.T8A, %struct.T8A* %a, i32 0, i32 1
+  // CHECK: [[LOAD3:%[-a-zA-Z._0-9]+]] = load i32, i32* [[RES3]],
+  // CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* {{.*}}, i32 0, i32 0), i32 [[LOAD3]])
+  // CHECK: call i32 (i8*, ...) @printf(
   __builtin_dump_struct(&a, &printf);
 }