llvm-mirror/test/CodeGen/AArch64/local_vars.ll
Francis Visoiu Mistrih f7ea499702 Replace "no-frame-pointer-*" function attributes with "frame-pointer"
Part of the effort to refactoring frame pointer code generation. We used
to use two function attributes "no-frame-pointer-elim" and
"no-frame-pointer-elim-non-leaf" to represent three kinds of frame
pointer usage: (all) frames use frame pointer, (non-leaf) frames use
frame pointer, (none) frame use frame pointer. This CL makes the idea
explicit by using only one enum function attribute "frame-pointer"

Option "-frame-pointer=" replaces "-disable-fp-elim" for tools such as
llc.

"no-frame-pointer-elim" and "no-frame-pointer-elim-non-leaf" are still
supported for easy migration to "frame-pointer".

tests are mostly updated with

// replace command line args ‘-disable-fp-elim=false’ with ‘-frame-pointer=none’
grep -iIrnl '\-disable-fp-elim=false' * | xargs sed -i '' -e "s/-disable-fp-elim=false/-frame-pointer=none/g"

// replace command line args ‘-disable-fp-elim’ with ‘-frame-pointer=all’
grep -iIrnl '\-disable-fp-elim' * | xargs sed -i '' -e "s/-disable-fp-elim/-frame-pointer=all/g"

Patch by Yuanfang Chen (tabloid.adroit)!

Differential Revision: https://reviews.llvm.org/D56351

llvm-svn: 351049
2019-01-14 10:55:55 +00:00

62 lines
1.6 KiB
LLVM

; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -frame-pointer=all | FileCheck -check-prefix CHECK-WITHFP-ARM64 %s
; Make sure a reasonably sane prologue and epilogue are
; generated. This test is not robust in the face of an frame-handling
; evolving, but still has value for unrelated changes, I
; believe.
;
; In particular, it will fail when ldp/stp are used for frame setup,
; when FP-elim is implemented, and when addressing from FP is
; implemented.
@var = global i64 0
@local_addr = global i64* null
declare void @foo()
define void @trivial_func() nounwind {
; CHECK-LABEL: trivial_func: // @trivial_func
; CHECK-NEXT: // %bb.0
; CHECK-NEXT: ret
ret void
}
define void @trivial_fp_func() {
; CHECK-LABEL: trivial_fp_func:
; CHECK: str x30, [sp, #-16]!
; CHECK-NOT: mov x29, sp
; CHECK-WITHFP-ARM64-LABEL: trivial_fp_func:
; CHECK-WITHFP-ARM64: stp x29, x30, [sp, #-16]!
; CHECK-WITHFP-ARM64-NEXT: mov x29, sp
; Dont't really care, but it would be a Bad Thing if this came after the epilogue.
; CHECK-WITHFP-ARM64: bl foo
; CHECK: bl foo
call void @foo()
ret void
; CHECK: ldr x30, [sp], #16
; CHECK-NEXT: ret
; CHECK-WITHFP-ARM64: ldp x29, x30, [sp], #16
; CHECK-WITHFP-ARM64-NEXT: ret
}
define void @stack_local() {
%local_var = alloca i64
; CHECK-LABEL: stack_local:
; CHECK: sub sp, sp, #16
%val = load i64, i64* @var
store i64 %val, i64* %local_var
; CHECK-DAG: str {{x[0-9]+}}, [sp, #{{[0-9]+}}]
store i64* %local_var, i64** @local_addr
; CHECK-DAG: add {{x[0-9]+}}, sp, #{{[0-9]+}}
ret void
}