https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86395
Bug ID: 86395
Summary: add support of -fopt-info-inline in early inliner
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: qinzhao at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
currently, -fopt-info-inline does not report any info from early inliner.
for example:
[qinzhao@localhost inline_report]$ cat inline_1.c
static int foo (int a)
{
return a + 10;
}
static int bar (int b)
{
return b - 20;
}
static int boo (int a, int b)
{
return foo (a) + bar (b);
}
extern int v_a, v_b;
extern int result;
int compute ()
{
result = boo (v_a, v_b);
return result;
}
[qinzhao@localhost inline_report]$ /home/qinzhao/Install/latest/bin/gcc -O3
-fopt-info-inline-optimized-missed=inline.txt inline_1.c -S
[qinzhao@localhost inline_report]$ ls -l inline.txt
-rw-rw-r--. 1 qinzhao qinzhao 0 Jul 3 11:25 inline.txt
[qinzhao@localhost inline_report]$ cat inline_1.s
.file "inline_1.c"
.text
.p2align 4,,15
.globl compute
.type compute, @function
compute:
.LFB3:
.cfi_startproc
movl v_a(%rip), %edx
movl v_b(%rip), %eax
leal -10(%rdx,%rax), %eax
movl %eax, result(%rip)
ret
.cfi_endproc
.LFE3:
.size compute, .-compute
.ident "GCC: (GNU) 9.0.0 20180702 (experimental)"
.section .note.GNU-stack,"",@progbits
From the above, we can see:
1. the call chains to —>“boo”->”foo”, “bar” in the routine “compute” are
completely inlined by early inliner into “compute”;
2. However, there is NO any inline information is dumped into “inline.txt”.
This PR is to request -fopt-info-inline support for early inliner
