26cd258420
While checking is tail call optimization is possible, the calling convention applied to fixed arguments is not the correct one. This implies for DarwinPCS that all arguments of a vararg function will go to the stack although fixed ones can go in registers. This prevents non-virtual thunks to be tail optimized although they are marked as musttail. Differential Revision: https://reviews.llvm.org/D120622
37 lines
1.7 KiB
LLVM
37 lines
1.7 KiB
LLVM
; With Darwin PCS, non-virtual thunks generated are generated with musttail
|
|
; and are expected to build
|
|
; In general Darwin PCS should be tail optimized
|
|
; RUN: llc -mtriple=arm64-apple-ios5.0.0 < %s | FileCheck %s
|
|
|
|
; CHECK-LABEL: __ZThn16_N1C3addEPKcz:
|
|
; CHECK: b __ZN1C3addEPKcz
|
|
; CHECK-LABEL: _tailTest:
|
|
; CHECK: b __ZN1C3addEPKcz
|
|
; CHECK-LABEL: __ZThn8_N1C1fEiiiiiiiiiz:
|
|
; CHECK: ldr w9, [sp, #4]
|
|
; CHECK: str w9, [sp, #4]
|
|
; CHECK: b __ZN1C1fEiiiiiiiiiz
|
|
|
|
%class.C = type { %class.A.base, [4 x i8], %class.B.base, [4 x i8] }
|
|
%class.A.base = type <{ i32 (...)**, i32 }>
|
|
%class.B.base = type <{ i32 (...)**, i32 }>
|
|
|
|
declare void @_ZN1C3addEPKcz(%class.C*, i8*, ...) unnamed_addr #0 align 2
|
|
|
|
define void @_ZThn16_N1C3addEPKcz(%class.C* %0, i8* %1, ...) unnamed_addr #0 align 2 {
|
|
musttail call void (%class.C*, i8*, ...) @_ZN1C3addEPKcz(%class.C* noundef nonnull align 8 dereferenceable(28) undef, i8* noundef %1, ...)
|
|
ret void
|
|
}
|
|
|
|
define void @tailTest(%class.C* %0, i8* %1, ...) unnamed_addr #0 align 2 {
|
|
tail call void (%class.C*, i8*, ...) @_ZN1C3addEPKcz(%class.C* noundef nonnull align 8 dereferenceable(28) undef, i8* noundef %1)
|
|
ret void
|
|
}
|
|
|
|
declare void @_ZN1C1fEiiiiiiiiiz(%class.C* %0, i32 %1, i32 %2, i32 %3, i32 %4, i32 %5, i32 %6, i32 %7, i32 %8, i32 noundef %9, ...) unnamed_addr #1 align 2
|
|
|
|
define void @_ZThn8_N1C1fEiiiiiiiiiz(%class.C* %0, i32 %1, i32 %2, i32 %3, i32 %4, i32 %5, i32 %6, i32 %7, i32 %8, i32 noundef %9, ...) unnamed_addr #1 align 2 {
|
|
musttail call void (%class.C*, i32, i32, i32, i32, i32, i32, i32, i32, i32, ...) @_ZN1C1fEiiiiiiiiiz(%class.C* nonnull align 8 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 noundef %9, ...)
|
|
ret void
|
|
}
|