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riscv: Add codegen test for global stack canary
Make sure the code generated for a global stack guard canary references __stack_chk_guard before and after intervening function code. Signed-off-by: Keith Packard <[email protected]>
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5 | ||
; RUN: llc -mtriple=riscv64-unknown-elf -verify-machineinstrs < %s | \ | ||
; RUN: FileCheck %s | ||
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define void @foo(i64 %t) sspstrong { | ||
; CHECK-LABEL: foo: | ||
; CHECK: # %bb.0: | ||
; CHECK-NEXT: addi sp, sp, -32 | ||
; CHECK-NEXT: .cfi_def_cfa_offset 32 | ||
; CHECK-NEXT: sd ra, 24(sp) # 8-byte Folded Spill | ||
; CHECK-NEXT: sd s0, 16(sp) # 8-byte Folded Spill | ||
; CHECK-NEXT: sd s1, 8(sp) # 8-byte Folded Spill | ||
; CHECK-NEXT: .cfi_offset ra, -8 | ||
; CHECK-NEXT: .cfi_offset s0, -16 | ||
; CHECK-NEXT: .cfi_offset s1, -24 | ||
; CHECK-NEXT: addi s0, sp, 32 | ||
; CHECK-NEXT: .cfi_def_cfa s0, 0 | ||
; CHECK-NEXT: lui s1, %hi(__stack_chk_guard) | ||
; CHECK-NEXT: ld a1, %lo(__stack_chk_guard)(s1) | ||
; CHECK-NEXT: sd a1, -32(s0) | ||
; CHECK-NEXT: slli a0, a0, 2 | ||
; CHECK-NEXT: addi a0, a0, 15 | ||
; CHECK-NEXT: andi a0, a0, -16 | ||
; CHECK-NEXT: sub a0, sp, a0 | ||
; CHECK-NEXT: mv sp, a0 | ||
; CHECK-NEXT: call baz | ||
; CHECK-NEXT: ld a0, %lo(__stack_chk_guard)(s1) | ||
; CHECK-NEXT: ld a1, -32(s0) | ||
; CHECK-NEXT: bne a0, a1, .LBB0_2 | ||
; CHECK-NEXT: # %bb.1: | ||
; CHECK-NEXT: addi sp, s0, -32 | ||
; CHECK-NEXT: ld ra, 24(sp) # 8-byte Folded Reload | ||
; CHECK-NEXT: ld s0, 16(sp) # 8-byte Folded Reload | ||
; CHECK-NEXT: ld s1, 8(sp) # 8-byte Folded Reload | ||
; CHECK-NEXT: addi sp, sp, 32 | ||
; CHECK-NEXT: ret | ||
; CHECK-NEXT: .LBB0_2: | ||
; CHECK-NEXT: call __stack_chk_fail | ||
%vla = alloca i32, i64 %t, align 4 | ||
call void @baz(ptr nonnull %vla) | ||
ret void | ||
} | ||
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declare void @baz(ptr) | ||
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!llvm.module.flags = !{!1} | ||
!1 = !{i32 2, !"stack-protector-guard", !"global"} |