[llvm] [SHT_LLVM_BB_ADDR_MAP][llvm-readobj] Implements llvm-readobj handling for PGOAnalysisMap. (PR #79520)

[Micah Weston via llvm-commits]

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+## This test checks how we handle PGO Analysis Map in --bb-addr-map.
+
+## Fails on windows (https://github.com/llvm/llvm-project/issues/60013).
+# UNSUPPORTED: system-windows
+
+## Check 64-bit:
+# RUN: yaml2obj --docnum=1 %s -DBITS=64 -DADDR=0x999999999 -o %t1.x64.o
+# RUN: llvm-readobj %t1.x64.o --bb-addr-map 2>&1 | FileCheck %s -DADDR=0x999999999 -DFILE=%t1.x64.o --check-prefix=CHECK
+# RUN: llvm-readelf %t1.x64.o --bb-addr-map | FileCheck %s --check-prefix=GNU
+
+## Check 64-bit:
+# RUN: yaml2obj --docnum=1 %s -DBITS=64 -DADDR=0x999999999 -o %t1.v1.x64.o
+# RUN: llvm-readobj %t1.v1.x64.o --bb-addr-map 2>&1 | FileCheck %s -DADDR=0x999999999 -DFILE=%t1.v1.x64.o --check-prefix=CHECK
+
+## Check 32-bit:
+# RUN: yaml2obj --docnum=1 %s -DBITS=32 -o %t1.x32.o
+# RUN: llvm-readobj %t1.x32.o --bb-addr-map 2>&1 | FileCheck -DADDR=0x11111 %s -DFILE=%t1.x32.o --check-prefix=CHECK
+# RUN: llvm-readelf %t1.x32.o --bb-addr-map | FileCheck %s --check-prefix=GNU
+
+## Check that a malformed section can be handled.
+# RUN: yaml2obj --docnum=1 %s -DBITS=32 -DSIZE=6 -o %t2.o
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red1bluelost wrote:

Good idea, I've updated it so that it should fall in PGO data and checked the offset using objdump.

https://github.com/llvm/llvm-project/pull/79520