Fix a few places in DAGCombiner that were creating all-ones-bits

and high-bits values in ways that weren't correct for integer
types wider than 64 bits. This fixes a miscompile in
PPMacroExpansion.cpp in clang on x86-64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78295 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/X86/wide-integer-fold.ll

@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | llc -march=x86-64 | FileCheck %s
+; CHECK:  movq  $-65535, %rax
+
+; DAGCombiner should fold this to a simple constant.
+
+define i64 @foo(i192 %a) nounwind {
+  %t = or i192 %a, -22300404916163702203072254898040925442801665
+  %s = and i192 %t, -22300404916163702203072254898040929737768960
+  %u = lshr i192 %s, 128
+  %v = trunc i192 %u to i64
+  ret i64 %v
+}