[llvm] [BOLT][AArch64][NFC] Add test for conditional tail calls. (PR #201139)

[via llvm-commits]

llvmorg-github-actions[bot] wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-bolt

Author: Alexandros Lamprineas (labrinea)

<details>
<summary>Changes</summary>

This used to crash due to failing assertion:
"FKI.TargetOffset == 0 && "0-bit relocation offset expected"

---
Full diff: https://github.com/llvm/llvm-project/pull/201139.diff


1 Files Affected:

- (added) bolt/test/AArch64/conditional-tailcall.s (+49) 


``````````diff
diff --git a/bolt/test/AArch64/conditional-tailcall.s b/bolt/test/AArch64/conditional-tailcall.s
new file mode 100644
index 0000000000000..f05ec4b0610cd
--- /dev/null
+++ b/bolt/test/AArch64/conditional-tailcall.s
@@ -0,0 +1,49 @@
+# Bolt can handle conditional tail calls.
+
+# RUN: %clang %cflags -Wl,-q %s -o %t
+# RUN: llvm-bolt %t -o %t.bolt --skip-funcs foo
+# RUN: llvm-objdump -d %t.bolt | FileCheck %s
+
+  .text
+  .globl foo
+  .type foo, %function
+foo:
+
+test_cbz:
+  cbz xzr, bar
+test_cbnz:
+  cbnz xzr, bar
+test_tbz:
+  tbz xzr, #0, bar
+test_tbnz:
+  tbnz xzr, #0, bar
+test_beq:
+  cmp wzr, wzr
+  b.eq bar
+test_bne:
+  cmp wzr, wzr
+  b.ne bar
+
+  .globl bar
+  .type bar, %function
+bar:
+  ret  xzr
+
+# CHECK: Disassembly of section .bolt.org.text:
+#
+# CHECK:      <test_cbz>:
+# CHECK-NEXT:            {{.*}} cbz xzr, 0x[[ADDR:[0-9a-f]+]] <bar>
+# CHECK:      <test_cbnz>:
+# CHECK-NEXT:            {{.*}} cbnz xzr, 0x[[ADDR]] <bar>
+# CHECK:      <test_tbz>:
+# CHECK-NEXT:            {{.*}} tbz wzr, #0x0, 0x[[ADDR]] <bar>
+# CHECK:      <test_tbnz>:
+# CHECK-NEXT:            {{.*}} tbnz wzr, #0x0, 0x[[ADDR]] <bar>
+# CHECK:      <test_beq>:
+# CHECK-NEXT:            {{.*}} cmp wzr, wzr
+# CHECK-NEXT:            {{.*}} b.eq 0x[[ADDR]] <bar>
+# CHECK:      <test_bne>:
+# CHECK-NEXT:            {{.*}} cmp wzr, wzr
+# CHECK-NEXT:            {{.*}} b.ne 0x[[ADDR]] <bar>
+# CHECK:      <bar>:
+# CHECK-NEXT: [[ADDR]]: {{.*}} ret xzr

``````````

</details>


https://github.com/llvm/llvm-project/pull/201139