#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Support/CallSite.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
+#include "llvm/Target/TargetOptions.h"
using namespace llvm;
namespace {
CC != CallingConv::X86_FastCall)
return false;
+ // On X86, -tailcallopt changes the fastcc ABI. FastISel doesn't
+ // handle this for now.
+ if (CC == CallingConv::Fast && PerformTailCallOpt)
+ return false;
+
// Let SDISel handle vararg functions.
const PointerType *PT = cast<PointerType>(CS.getCalledValue()->getType());
const FunctionType *FTy = cast<FunctionType>(PT->getElementType());
--- /dev/null
+; RUN: llvm-as < %s | llc -fast-isel -tailcallopt -march=x86 | not grep add
+; PR4154
+
+; On x86, -tailcallopt changes the ABI so the caller shouldn't readjust
+; the stack pointer after the call in this code.
+
+define i32 @stub(i8* %t0) nounwind {
+entry:
+ %t1 = load i32* inttoptr (i32 139708680 to i32*) ; <i32> [#uses=1]
+ %t2 = bitcast i8* %t0 to i32 (i32)* ; <i32 (i32)*> [#uses=1]
+ %t3 = call fastcc i32 %t2(i32 %t1) ; <i32> [#uses=1]
+ ret i32 %t3
+}