[FastISel] Fix the patchpoint intrinsic lowering in FastISel for large target addresses.

This fixes a mistake where I accidentially dropped the upper 32bit of a
64bit pointer during FastISel lowering of the patchpoint intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214367 91177308-0d34-0410-b5e6-96231b3b80d8

Author: ributzka

lib/CodeGen/SelectionDAG/FastISel.cpp

@@ -769,7 +769,7 @@ bool FastISel::SelectPatchpoint(const CallInst *I) {
 
   // Assume that the callee is a constant address or null pointer.
   // FIXME: handle function symbols in the future.
-  unsigned CalleeAddr;
+  uint64_t CalleeAddr;
   if (const auto *C = dyn_cast<IntToPtrInst>(Callee))
     CalleeAddr = cast<ConstantInt>(C->getOperand(0))->getZExtValue();
   else if (const auto *C = dyn_cast<ConstantExpr>(Callee)) {

test/CodeGen/X86/patchpoint.ll

@@ -39,7 +39,6 @@ entry:
   ret void
 }
 
-
 ; Test patchpoints reusing the same TargetConstant.
 ; <rdar:15390785> Assertion failed: (CI.getNumArgOperands() >= NumArgs + 4)
 ; There is no way to verify this, since it depends on memory allocation.
@@ -72,6 +71,17 @@ entry:
   ret void
 }
 
+; Test large target address.
+define i64 @large_target_address_patchpoint_codegen() {
+entry:
+; CHECK-LABEL: large_target_address_patchpoint_codegen:
+; CHECK:      movabsq $6153737369414576827, %r11
+; CHECK-NEXT: callq *%r11
+  %resolveCall2 = inttoptr i64 6153737369414576827 to i8*
+  %result = tail call i64 (i64, i32, i8*, i32, ...)* @llvm.experimental.patchpoint.i64(i64 2, i32 15, i8* %resolveCall2, i32 0)
+  ret i64 %result
+}
+
 declare void @llvm.experimental.stackmap(i64, i32, ...)
 declare void @llvm.experimental.patchpoint.void(i64, i32, i8*, i32, ...)
 declare i64 @llvm.experimental.patchpoint.i64(i64, i32, i8*, i32, ...)