[llvm] [AArch64][BOLT] Ensure tentative code layout for cold BBs runs. (PR #96609)

[Vladislav Khmelevsky via llvm-commits]

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@@ -0,0 +1,14 @@
+// This test checks that tentative code layout for cold basic blocks runs
+// at least once, even when each function after the hot/cold frontier is not
+// emittable. This is done by ignoring each function using the 'skip-funcs' flag.
+// In a realistic scenario, this may happen when lite mode is enabled along
+// with a bolt profile.
+
+REQUIRES: system-linux
+
+RUN: %clang %cflags %p/../Inputs/asm_main.c -Wl,-q -o %t
+
+RUN: llvm-bolt %t -o %t.bolt -lite=1 -split-functions -split-all-cold \
+RUN: --skip-funcs="_init,_start,call_weak_fn/1,deregister_tm_clones/1,register_tm_clones/1,__do_global_dtors_aux/1,frame_dummy/1,main,foo,_fini" 2>&1 | FileCheck %s
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yota9 wrote:

Since we're using nostdlib flag most of these symbols won't appear in the binary except foo and main. 

https://github.com/llvm/llvm-project/pull/96609