Don't crash printing the asm for a ConstantExpr PtrToInt just because the int

is narrower than the pointer. This testcase emits:

  .byte (((17) - 16) & 255)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54517 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter.cpp
index 366b8b398f9a1b8a971b89591b7b91631e05d5f1..1ee71bdc72b79848bad59ec2a1a7cba58a22a103 100644 (file)
--- a/lib/CodeGen/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter.cpp
@@ -821,12 +821,13 @@ void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
 
       // We can emit the pointer value into this slot if the slot is an
       // integer slot greater or equal to the size of the pointer.
-      if (Ty->isInteger() &&
-          TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
+      if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
         return EmitConstantValueOnly(Op);
-      
-      assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
+
+      O << "((";
       EmitConstantValueOnly(Op);
+      APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
+      O << ") & " << ptrMask.toStringUnsigned() << ')';
       break;
     }
     case Instruction::Add:

diff --git a/test/CodeGen/Generic/2008-08-07-PtrToInt-SmallerInt.ll b/test/CodeGen/Generic/2008-08-07-PtrToInt-SmallerInt.ll
new file mode 100644 (file)
index 0000000..a60d101
--- /dev/null
+++ b/test/CodeGen/Generic/2008-08-07-PtrToInt-SmallerInt.ll
@@ -0,0 +1,7 @@
+; RUN: llvm-as < %s | llc
+; PR2603
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
+target triple = "i386-pc-linux-gnu"
+        %struct.A = type { i8 }
+        %struct.B = type { i8, [1 x i8] }
+@Foo = constant %struct.A { i8 ptrtoint (i8* getelementptr ([1 x i8]* inttoptr (i32 17 to [1 x i8]*), i32 0, i32 -16) to i8) }          ; <%struct.A*> [#uses=0]