[BOLT] Respect -function-order in lite mode

Process functions listed in -function-order file even in lite mode.

Reviewed By: #bolt, maksfb

Differential Revision: https://reviews.llvm.org/D140435

2 files changed, 36 insertions, 0 deletions

diff --git a/bolt/test/X86/Inputs/order-lite.txt b/bolt/test/X86/Inputs/order-lite.txt
new file mode 100644
index 000000000000..ba2906d0666c
--- /dev/null
+++ b/bolt/test/X86/Inputs/order-lite.txt
@@ -0,0 +1 @@
+main
diff --git a/bolt/test/X86/function-order-lite.s b/bolt/test/X86/function-order-lite.s
new file mode 100644
index 000000000000..05af73da7815
--- /dev/null
+++ b/bolt/test/X86/function-order-lite.s
@@ -0,0 +1,35 @@
+# Check that functions listed in -function-order list take precedence over
+# lite mode function filtering.
+
+# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
+# RUN: link_fdata %s %t.o %t.fdata
+# RUN: %clang %cflags %t.o -o %t.exe -Wl,-q
+# RUN: llvm-bolt %t.exe --data %t.fdata --lite --reorder-functions=user \
+# RUN:   --function-order=%p/Inputs/order-lite.txt -o %t -print-all 2>&1 \
+# RUN:   | FileCheck %s
+
+# CHECK: 1 out of 2 functions in the binary (50.0%) have non-empty execution profile
+# CHECK: Binary Function "main" after reorder-functions
+
+  .globl main
+  .type main, %function
+main:
+	.cfi_startproc
+.LBB06:
+	callq	testfunc
+	retq
+	.cfi_endproc
+.size main, .-main
+
+  .globl testfunc
+  .type testfunc, %function
+testfunc:
+# FDATA: 0 [unknown] 0 1 testfunc 0 1 0
+	.cfi_startproc
+	pushq	%rbp
+	movq	%rsp, %rbp
+	movl	$0x0, %eax
+	popq	%rbp
+	retq
+	.cfi_endproc
+.size testfunc, .-testfunc