// Emit marker "movq %rax, %rdi". %rdi is not callee-saved, so it cannot be
// live across the earlier call. The call to the ObjC runtime function returns
// the first argument, so the value of %rax is unchanged after the ObjC
- // runtime call.
+ // runtime call. On Windows targets, the runtime call follows the regular
+ // x64 calling convention and expects the first argument in %rcx.
+ auto TargetReg = STI->getTargetTriple().isOSWindows() ? X86::RCX : X86::RDI;
auto *Marker = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(X86::MOV64rr))
- .addReg(X86::RDI, RegState::Define)
+ .addReg(TargetReg, RegState::Define)
.addReg(X86::RAX)
.getInstr();
if (MI.shouldUpdateCallSiteInfo())
; RUN: llc -mtriple=x86_64-apple-macosx -verify-machineinstrs -o - %s | FileCheck --check-prefix=CHECK %s
+; RUN: llc -mtriple=x86_64-windows-msvc -verify-machineinstrs -o - %s | FileCheck --check-prefix=WINABI %s
; TODO: support marker generation with GlobalISel
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
; CHECK-NEXT: popq %rcx
; CHECK-NEXT: retq
;
+; WINABI-LABEL: rv_marker_1_retain:
+; WINABI: callq foo1
+; WINABI-NEXT: movq %rax, %rcx
+; WINABI-NEXT: callq objc_retainAutoreleasedReturnValue
+; WINABI-NEXT: nop
+;
entry:
%call = call ptr @foo1() [ "clang.arc.attachedcall"(ptr @objc_retainAutoreleasedReturnValue) ]
ret ptr %call