23d209f350
SPARC ABI doesn't use stack realignment, so let LLVM know about it in `SparcFrameLowering`. This has the side effect of making all overaligned allocations go through `LowerDYNAMIC_STACKALLOC`, so implement the missing logic there too for overaligned allocations. This makes the SPARC backend not crash on overaligned `alloca`s and fix https://github.com/llvm/llvm-project/issues/89569.
40 lines
1.5 KiB
LLVM
40 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
|
|
; RUN: llc -march=sparc < %s | FileCheck %s --check-prefixes=CHECK32
|
|
; RUN: llc -march=sparcv9 < %s | FileCheck %s --check-prefixes=CHECK64
|
|
declare void @stack_realign_helper(i32 %a, ptr %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 add/and),
|
|
;; 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).
|
|
|
|
define void @stack_realign(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g) nounwind {
|
|
; CHECK32-LABEL: stack_realign:
|
|
; CHECK32: ! %bb.0: ! %entry
|
|
; CHECK32-NEXT: save %sp, -96, %sp
|
|
; CHECK32-NEXT: ld [%fp+92], %o0
|
|
; CHECK32-NEXT: add %sp, 80, %i0
|
|
; CHECK32-NEXT: and %i0, -64, %o1
|
|
; CHECK32-NEXT: call stack_realign_helper
|
|
; CHECK32-NEXT: add %o1, -96, %sp
|
|
; CHECK32-NEXT: ret
|
|
; CHECK32-NEXT: restore
|
|
;
|
|
; CHECK64-LABEL: stack_realign:
|
|
; CHECK64: ! %bb.0: ! %entry
|
|
; CHECK64-NEXT: save %sp, -128, %sp
|
|
; CHECK64-NEXT: add %sp, 2159, %i0
|
|
; CHECK64-NEXT: and %i0, -64, %o1
|
|
; CHECK64-NEXT: add %o1, -2175, %sp
|
|
; CHECK64-NEXT: add %sp, -48, %sp
|
|
; CHECK64-NEXT: call stack_realign_helper
|
|
; CHECK64-NEXT: ld [%fp+2227], %o0
|
|
; CHECK64-NEXT: add %sp, 48, %sp
|
|
; CHECK64-NEXT: ret
|
|
; CHECK64-NEXT: restore
|
|
entry:
|
|
%aligned = alloca i32, align 64
|
|
call void @stack_realign_helper(i32 %g, ptr %aligned)
|
|
ret void
|
|
}
|