mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-26 04:32:44 +01:00
96096cd4c5
Summary: This was broken long ago in D12208, which failed to account for the fact that 64-bit SPARC uses a stack bias of 2047, and it is the *unbiased* value which should be aligned, not the biased one. This was seen to be an issue with Rust. Patch by: jrtc27 (James Clarke) Reviewers: jyknight, venkatra Reviewed By: jyknight Subscribers: jacob_hansen, JDevlieghere, fhahn, fedor.sergeev, llvm-commits Differential Revision: https://reviews.llvm.org/D39425 llvm-svn: 323643
27 lines
1.0 KiB
LLVM
27 lines
1.0 KiB
LLVM
; RUN: llc -march=sparc < %s | FileCheck %s --check-prefixes=CHECK,CHECK32
|
|
; RUN: llc -march=sparcv9 < %s | FileCheck %s --check-prefixes=CHECK,CHECK64
|
|
declare void @stack_realign_helper(i32 %a, i32* %b)
|
|
|
|
;; This is a function where we have a local variable of 64-byte
|
|
;; alignment. We want to see that the stack is aligned (the initial
|
|
;; andn), that the local var is accessed via stack pointer (to %o1), and that
|
|
;; the argument is accessed via frame pointer not stack pointer (to %o0).
|
|
|
|
;; CHECK-LABEL: stack_realign:
|
|
;; CHECK32: andn %sp, 63, %sp
|
|
;; CHECK32-NEXT: ld [%fp+92], %o0
|
|
;; CHECK64: add %sp, 2047, %g1
|
|
;; CHECK64-NEXT: andn %g1, 63, %g1
|
|
;; CHECK64-NEXT: add %g1, -2047, %sp
|
|
;; CHECK64-NEXT: ld [%fp+2227], %o0
|
|
;; CHECK-NEXT: call stack_realign_helper
|
|
;; CHECK32-NEXT: add %sp, 128, %o1
|
|
;; CHECK64-NEXT: add %sp, 2239, %o1
|
|
|
|
define void @stack_realign(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g) {
|
|
entry:
|
|
%aligned = alloca i32, align 64
|
|
call void @stack_realign_helper(i32 %g, i32* %aligned)
|
|
ret void
|
|
}
|