mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-23 21:13:02 +02:00
d1cad41742
According to MSDN (see the PR), functions which don't touch any callee-saved registers (including %rsp) don't need any unwind info. This patch makes LLVM not emit unwind info for such functions, to save binary size. Differential Revision: https://reviews.llvm.org/D24748 llvm-svn: 282185
32 lines
714 B
LLVM
32 lines
714 B
LLVM
; RUN: llc < %s -O1 -mtriple=x86_64-pc-win32 | FileCheck %s -check-prefix=ASM
|
|
; RUN: llc < %s -O1 -mtriple=x86_64-pc-win32 -filetype=obj -o %t
|
|
; RUN: llvm-readobj -unwind %t | FileCheck %s -check-prefix=READOBJ
|
|
|
|
declare void @g(i32)
|
|
|
|
define i32 @not_leaf(i32) uwtable {
|
|
entry:
|
|
call void @g(i32 42)
|
|
ret i32 42
|
|
|
|
; ASM-LABEL: not_leaf:
|
|
; ASM: .seh
|
|
|
|
; READOBJ: RuntimeFunction {
|
|
; READOBJ-NEXT: StartAddress: not_leaf
|
|
; READOBJ-NEXT: EndAddress: not_leaf
|
|
}
|
|
|
|
define void @leaf_func(i32) uwtable {
|
|
entry:
|
|
tail call void @g(i32 42)
|
|
ret void
|
|
|
|
; A Win64 "leaf" function gets no .seh directives in the asm.
|
|
; ASM-LABEL: leaf_func:
|
|
; ASM-NOT: .seh
|
|
|
|
; and no unwind info in the object file.
|
|
; READOBJ-NOT: leaf_func
|
|
}
|