return CallOpc;
}
+static
+bool isLocalCall(const SDValue &Callee)
+{
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
+ return !G->getGlobal()->isDeclaration();
+ return false;
+}
+
SDValue
PPCTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
CallingConv::ID CallConv, bool isVarArg,
// from allocating it), resulting in an additional register being
// allocated and an unnecessary move instruction being generated.
needsTOCRestore = true;
- } else if (CallOpc == PPCISD::CALL_SVR4) {
- // Otherwise insert NOP.
+ } else if ((CallOpc == PPCISD::CALL_SVR4) && !isLocalCall(Callee)) {
+ // Otherwise insert NOP for non-local calls.
CallOpc = PPCISD::CALL_NOP_SVR4;
}
}
--- /dev/null
+; RUN: llc < %s -march=ppc64 | FileCheck %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+define void @foo() nounwind readnone noinline {
+ ret void
+}
+
+; Calls to local function does not require the TOC restore 'nop'
+define void @test_direct() nounwind readnone {
+; CHECK: test_direct:
+ tail call void @foo() nounwind
+; CHECK: bl foo
+; CHECK-NOT: nop
+ ret void
+}
+
+; Indirect calls requires a full stub creation
+define void @test_indirect(void ()* nocapture %fp) nounwind {
+; CHECK: test_indirect:
+ tail call void %fp() nounwind
+; CHECK: ld [[FP:[0-9]+]], 0(3)
+; CHECK: ld 11, 16(3)
+; CHECK: ld 2, 8(3)
+; CHECK-NEXT: mtctr [[FP]]
+; CHECK-NEXT: bctrl
+; CHECK-NEXT: ld 2, 40(1)
+ ret void
+}
+
+; Absolute vales should be have the TOC restore 'nop'
+define void @test_abs() nounwind {
+; CHECK: test_abs:
+ tail call void inttoptr (i64 1024 to void ()*)() nounwind
+; CHECK: bla 1024
+; CHECK-NEXT: nop
+ ret void
+}
+
+declare double @sin(double) nounwind
+
+; External functions call should also have a 'nop'
+define double @test_external(double %x) nounwind {
+; CHECK: test_external:
+ %call = tail call double @sin(double %x) nounwind
+; CHECK: bl sin
+; CHECK-NEXT: nop
+ ret double %call
+}