## Check that BOLT handles correctly folding functions with --icf=safe that can be referenced by non-control flow instructions.
## It invokes BOLT twice first testing CFG path, and second when functions have to be disassembled.

# REQUIRES: system-linux, asserts
# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-linux %s -o %t1.o
# RUN: %clang %cflags %t1.o -o %t.exe -Wl,-q
# RUN: llvm-bolt --no-threads %t.exe --icf -debug-only=bolt-icf \
# RUN:        -o %t.bolt 2>&1 | FileCheck --check-prefix=ICFCHECK %s
# RUN: llvm-bolt --no-threads %t.exe --icf=safe -debug-only=bolt-icf \
# RUN:        -o %t.bolt 2>&1 | FileCheck --check-prefix=SAFEICFCHECK %s
# RUN: llvm-bolt --no-threads %t.exe --icf=safe -debug-only=bolt-icf \
# RUN:        --skip-funcs=helper1Func,main -o %t.bolt 2>&1 | FileCheck --check-prefix=SAFEICFCHECKNOCFG %s

# ICFCHECK:      ICF iteration 1
# ICFCHECK-NEXT: folding barAddFunc into fooAddFunc
# ICFCHECK-NEXT: folding barSubFunc into fooSubFunc

# SAFEICFCHECK: skipping function with reference taken barAddFunc
# SAFEICFCHECK-NEXT: ICF iteration 1
# SAFEICFCHECK-NEXT: folding barSubFunc into fooSubFunc

# SAFEICFCHECKNOCFG: skipping function with reference taken barAddFunc
# SAFEICFCHECKNOCFG-NEXT: ICF iteration 1
# SAFEICFCHECKNOCFG-NEXT: folding barSubFunc into fooSubFunc

## clang++ -c main.cpp -o main.o
## extern int FooVar;
## extern int BarVar;
## [[clang::noinline]]
## int fooSub(int a, int b) {
##   return a - b;
## }
## [[clang::noinline]]
## int barSub(int a, int b) {
##   return a - b;
## }
## [[clang::noinline]]
## int fooAdd(int a, int b) {
##   return a + b;
## }
## [[clang::noinline]]
## int barAdd(int a, int b) {
##   return a + b;
## }
## int main(int argc, char **argv) {
##   int temp = helper1(barAdd, FooVar, BarVar) +
##              fooSub(FooVar, BarVar) +
##              barSub(FooVar, BarVar) + fooAdd(FooVar, BarVar);
##   return temp;
## }
	.globl	fooSubFunc
	.type	fooSubFunc,@function
fooSubFunc:
	subl	-8(%rbp), %eax
	retq
	.size	fooSubFunc, .-fooSubFunc

	.globl	barSubFunc
	.type	barSubFunc,@function
barSubFunc:
	subl	-8(%rbp), %eax
	retq
	.size	barSubFunc, .-barSubFunc

	.globl	fooAddFunc
	.type	fooAddFunc,@function
fooAddFunc:
	addl	-8(%rbp), %eax
	retq
	.size	fooAddFunc, .-fooAddFunc

	.globl	barAddFunc
	.type	barAddFunc,@function
barAddFunc:
	addl	-8(%rbp), %eax
	retq
	.size	barAddFunc, .-barAddFunc

	.globl	helper1Func
	.type	helper1Func,@function
helper1Func:
	leaq	barAddFunc(%rip), %rax
	cmpq	%rax, -16(%rbp)
	retq
	.size	helper1Func, .-helper1Func

	.globl	main
	.type	main,@function
main:
	leaq	barAddFunc(%rip), %rdi
	callq	helper1Func
	callq	fooSubFunc
	callq	barSubFunc
	callq	fooAddFunc
	retq
	.size	main, .-main