diff options
Diffstat (limited to 'test/CodeGen/X86/musttail-varargs.ll')
| -rw-r--r-- | test/CodeGen/X86/musttail-varargs.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/CodeGen/X86/musttail-varargs.ll b/test/CodeGen/X86/musttail-varargs.ll index 1e99c14..7f105a1 100644 --- a/test/CodeGen/X86/musttail-varargs.ll +++ b/test/CodeGen/X86/musttail-varargs.ll @@ -1,13 +1,21 @@ ; RUN: llc < %s -enable-tail-merge=0 -mtriple=x86_64-linux | FileCheck %s --check-prefix=LINUX ; RUN: llc < %s -enable-tail-merge=0 -mtriple=x86_64-windows | FileCheck %s --check-prefix=WINDOWS +; RUN: llc < %s -enable-tail-merge=0 -mtriple=i686-windows | FileCheck %s --check-prefix=X86 ; Test that we actually spill and reload all arguments in the variadic argument ; pack. Doing a normal call will clobber all argument registers, and we will ; spill around it. A simple adjustment should not require any XMM spills. +declare void @llvm.va_start(i8*) nounwind + declare void(i8*, ...)* @get_f(i8* %this) define void @f_thunk(i8* %this, ...) { + ; Use va_start so that we exercise the combination. + %ap = alloca [4 x i8*], align 16 + %ap_i8 = bitcast [4 x i8*]* %ap to i8* + call void @llvm.va_start(i8* %ap_i8) + %fptr = call void(i8*, ...)*(i8*)* @get_f(i8* %this) musttail call void (i8*, ...)* %fptr(i8* %this, ...) ret void @@ -65,6 +73,12 @@ define void @f_thunk(i8* %this, ...) { ; WINDOWS-NOT: mov{{.}}ps ; WINDOWS: jmpq *{{.*}} # TAILCALL +; No regparms on normal x86 conventions. + +; X86-LABEL: _f_thunk: +; X86: calll _get_f +; X86: jmpl *{{.*}} # TAILCALL + ; This thunk shouldn't require any spills and reloads, assuming the register ; allocator knows what it's doing. @@ -82,6 +96,9 @@ define void @g_thunk(i8* %fptr_i8, ...) { ; WINDOWS-NOT: movq ; WINDOWS: jmpq *%rcx # TAILCALL +; X86-LABEL: _g_thunk: +; X86: jmpl *%eax # TAILCALL + ; Do a simple multi-exit multi-bb test. %struct.Foo = type { i1, i8*, i8* } @@ -117,3 +134,7 @@ else: ; WINDOWS: jne ; WINDOWS: jmpq *{{.*}} # TAILCALL ; WINDOWS: jmpq *{{.*}} # TAILCALL +; X86-LABEL: _h_thunk: +; X86: jne +; X86: jmpl *{{.*}} # TAILCALL +; X86: jmpl *{{.*}} # TAILCALL |