[hwasan] Add testcase for check-memaccess when using a fixed shadow

The test case is based on hwasan-check-memaccess.ll (albeit updated
using update_llc_test_checks) with --hwasan-mapping-offset=...

--hwasan-mapping-offset=... actually doesn't affect the LLVM IR
at the moment; future work will introduce memaccess fixed shadow
intrinsics. (#89319)

Author: thurstond

llvm/test/CodeGen/AArch64/hwasan-check-memaccess-fixedshadow.ll

@@ -0,0 +1,165 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc --hwasan-mapping-offset=4398046511104 < %s | FileCheck %s
+
+target triple = "aarch64--linux-android"
+
+define ptr @f1(ptr %x0, ptr %x1) {
+; CHECK-LABEL: f1:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    str x30, [sp, #-16]! // 8-byte Folded Spill
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    .cfi_offset w30, -16
+; CHECK-NEXT:    mov x9, x0
+; CHECK-NEXT:    mov x0, x1
+; CHECK-NEXT:    bl __hwasan_check_x1_1
+; CHECK-NEXT:    ldr x30, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    ret
+  call void @llvm.hwasan.check.memaccess(ptr %x0, ptr %x1, i32 1)
+  ret ptr %x1
+}
+
+define ptr @f2(ptr %x0, ptr %x1) {
+; CHECK-LABEL: f2:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    stp x30, x20, [sp, #-16]! // 16-byte Folded Spill
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    .cfi_offset w20, -8
+; CHECK-NEXT:    .cfi_offset w30, -16
+; CHECK-NEXT:    mov x20, x1
+; CHECK-NEXT:    bl __hwasan_check_x0_2_short_v2
+; CHECK-NEXT:    ldp x30, x20, [sp], #16 // 16-byte Folded Reload
+; CHECK-NEXT:    ret
+  call void @llvm.hwasan.check.memaccess.shortgranules(ptr %x1, ptr %x0, i32 2)
+  ret ptr %x0
+}
+
+define void @f3(ptr %x0, ptr %x1) {
+  ; 0x3ff0000 (kernel, match-all = 0xff)
+; CHECK-LABEL: f3:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    str x30, [sp, #-16]! // 8-byte Folded Spill
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    .cfi_offset w30, -16
+; CHECK-NEXT:    mov x9, x0
+; CHECK-NEXT:    bl __hwasan_check_x1_67043328
+; CHECK-NEXT:    ldr x30, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    ret
+  call void @llvm.hwasan.check.memaccess(ptr %x0, ptr %x1, i32 67043328)
+  ret void
+}
+
+define void @f4(ptr %x0, ptr %x1) {
+  ; 0x1000010 (access-size-index = 0, is-write = 1, match-all = 0x0)
+; CHECK-LABEL: f4:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    stp x30, x20, [sp, #-16]! // 16-byte Folded Spill
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    .cfi_offset w20, -8
+; CHECK-NEXT:    .cfi_offset w30, -16
+; CHECK-NEXT:    mov x20, x0
+; CHECK-NEXT:    bl __hwasan_check_x1_16777232_short_v2
+; CHECK-NEXT:    ldp x30, x20, [sp], #16 // 16-byte Folded Reload
+; CHECK-NEXT:    ret
+  call void @llvm.hwasan.check.memaccess.shortgranules(ptr %x0, ptr %x1, i32 16777232)
+  ret void
+}
+
+declare void @llvm.hwasan.check.memaccess(ptr, ptr, i32)
+declare void @llvm.hwasan.check.memaccess.shortgranules(ptr, ptr, i32)
+
+; CHECK:      .section .text.hot,"axG",@progbits,__hwasan_check_x0_2_short_v2,comdat
+; CHECK-NEXT: .type __hwasan_check_x0_2_short_v2,@function
+; CHECK-NEXT: .weak __hwasan_check_x0_2_short_v2
+; CHECK-NEXT: .hidden __hwasan_check_x0_2_short_v2
+; CHECK-NEXT: __hwasan_check_x0_2_short_v2:
+; CHECK-NEXT: sbfx x16, x0, #4, #52
+; CHECK-NEXT: ldrb w16, [x20, x16]
+; CHECK-NEXT: cmp x16, x0, lsr #56
+; CHECK-NEXT: b.ne .Ltmp0
+; CHECK-NEXT: .Ltmp1:
+; CHECK-NEXT: ret
+; CHECK-NEXT: .Ltmp0:
+; CHECK-NEXT: cmp w16, #15
+; CHECK-NEXT: b.hi .Ltmp2
+; CHECK-NEXT: and x17, x0, #0xf
+; CHECK-NEXT: add x17, x17, #3
+; CHECK-NEXT: cmp w16, w17
+; CHECK-NEXT: b.ls .Ltmp2
+; CHECK-NEXT: orr x16, x0, #0xf
+; CHECK-NEXT: ldrb w16, [x16]
+; CHECK-NEXT: cmp x16, x0, lsr #56
+; CHECK-NEXT: b.eq .Ltmp1
+; CHECK-NEXT: .Ltmp2:
+; CHECK-NEXT: stp x0, x1, [sp, #-256]!
+; CHECK-NEXT: stp x29, x30, [sp, #232]
+; CHECK-NEXT: mov x1, #2
+; CHECK-NEXT: adrp  x16, :got:__hwasan_tag_mismatch_v2
+; CHECK-NEXT: ldr x16, [x16, :got_lo12:__hwasan_tag_mismatch_v2]
+; CHECK-NEXT: br  x16
+
+
+; CHECK:      .section .text.hot,"axG",@progbits,__hwasan_check_x1_1,comdat
+; CHECK-NEXT: .type __hwasan_check_x1_1,@function
+; CHECK-NEXT: .weak __hwasan_check_x1_1
+; CHECK-NEXT: .hidden __hwasan_check_x1_1
+; CHECK-NEXT: __hwasan_check_x1_1:
+; CHECK-NEXT: sbfx x16, x1, #4, #52
+; CHECK-NEXT: ldrb w16, [x9, x16]
+; CHECK-NEXT: cmp x16, x1, lsr #56
+; CHECK-NEXT: b.ne .Ltmp3
+; CHECK-NEXT: .Ltmp4:
+; CHECK-NEXT: ret
+; CHECK-NEXT: .Ltmp3:
+; CHECK-NEXT: stp x0, x1, [sp, #-256]!
+; CHECK-NEXT: stp x29, x30, [sp, #232]
+; CHECK-NEXT: mov x0, x1
+; CHECK-NEXT: mov x1, #1
+; CHECK-NEXT: adrp  x16, :got:__hwasan_tag_mismatch
+; CHECK-NEXT: ldr x16, [x16, :got_lo12:__hwasan_tag_mismatch]
+; CHECK-NEXT: br  x16
+
+; CHECK:      __hwasan_check_x1_67043328:
+; CHECK-NEXT: sbfx x16, x1, #4, #52
+; CHECK-NEXT: ldrb w16, [x9, x16]
+; CHECK-NEXT: cmp x16, x1, lsr #56
+; CHECK-NEXT: b.ne .Ltmp5
+; CHECK-NEXT: .Ltmp6:
+; CHECK-NEXT: ret
+; CHECK-NEXT: .Ltmp5:
+; CHECK-NEXT: lsr x17, x1, #56
+; CHECK-NEXT: cmp x17, #255
+; CHECK-NEXT: b.eq .Ltmp6
+; CHECK-NEXT: stp x0, x1, [sp, #-256]!
+; CHECK-NEXT: stp x29, x30, [sp, #232]
+; CHECK-NEXT: mov x0, x1
+; CHECK-NEXT: mov x1, #0
+; CHECK-NEXT: b __hwasan_tag_mismatch
+
+; CHECK:      __hwasan_check_x1_16777232_short_v2:
+; CHECK-NEXT: sbfx	x16, x1, #4, #52
+; CHECK-NEXT: ldrb	w16, [x20, x16]
+; CHECK-NEXT: cmp	x16, x1, lsr #56
+; CHECK-NEXT: b.ne	.Ltmp7
+; CHECK-NEXT: .Ltmp8:
+; CHECK-NEXT: ret
+; CHECK-NEXT: .Ltmp7:
+; CHECK-NEXT: lsr	x17, x1, #56
+; CHECK-NEXT: cmp	x17, #0
+; CHECK-NEXT: b.eq	.Ltmp8
+; CHECK-NEXT: cmp	w16, #15
+; CHECK-NEXT: b.hi	.Ltmp9
+; CHECK-NEXT: and	x17, x1, #0xf
+; CHECK-NEXT: cmp	w16, w17
+; CHECK-NEXT: b.ls	.Ltmp9
+; CHECK-NEXT: orr	x16, x1, #0xf
+; CHECK-NEXT: ldrb	w16, [x16]
+; CHECK-NEXT: cmp	x16, x1, lsr #56
+; CHECK-NEXT: b.eq	.Ltmp8
+; CHECK-NEXT: .Ltmp9:
+; CHECK-NEXT: stp	x0, x1, [sp, #-256]!
+; CHECK-NEXT: stp	x29, x30, [sp, #232]
+; CHECK-NEXT: mov	x0, x1
+; CHECK-NEXT: mov	x1, #16
+; CHECK-NEXT: adrp	x16, :got:__hwasan_tag_mismatch_v2
+; CHECK-NEXT: ldr	x16, [x16, :got_lo12:__hwasan_tag_mismatch_v2]
+; CHECK-NEXT: br	x16