ca076f7a63
Rebase of #84114. I've only included the core changes to frame layout calculation & CFI generation which sidesteps the regressions found after merging #84114. Since these changes are a necessary precursor to the overall fix and are themselves slightly beneficial as CFI is now generated correctly, I think it is reasonable to merge this first step. --- For very large stack frames, the offset from the stack pointer to a local can be more than 2^31 which overflows various `int` offsets in the frame lowering code. This patch updates the frame lowering code to calculate the offsets as 64-bit values and fixes CFI to use the corrected sizes. After this patch, additional work is needed to fix offset truncations in each target's codegen.
27 lines
829 B
LLVM
27 lines
829 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
|
|
; RUN: llc < %s -mtriple=riscv32 | FileCheck %s
|
|
|
|
define void @foo() {
|
|
; CHECK-LABEL: foo:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: addi sp, sp, -2032
|
|
; CHECK-NEXT: .cfi_def_cfa_offset 2032
|
|
; CHECK-NEXT: sw ra, 2028(sp) # 4-byte Folded Spill
|
|
; CHECK-NEXT: .cfi_offset ra, -4
|
|
; CHECK-NEXT: li a0, -2048
|
|
; CHECK-NEXT: sub sp, sp, a0
|
|
; CHECK-NEXT: .cfi_def_cfa_offset 4294967280
|
|
; CHECK-NEXT: addi a0, sp, 4
|
|
; CHECK-NEXT: call use
|
|
; CHECK-NEXT: li a0, -2048
|
|
; CHECK-NEXT: add sp, sp, a0
|
|
; CHECK-NEXT: lw ra, 2028(sp) # 4-byte Folded Reload
|
|
; CHECK-NEXT: addi sp, sp, 2032
|
|
; CHECK-NEXT: ret
|
|
%1 = alloca [1073741818 x i32], align 4
|
|
call void @use(ptr %1)
|
|
ret void
|
|
}
|
|
|
|
declare void @use(ptr)
|