blob: 70085d9bde1d9a3e1c0422a0f0f9e246e5763af5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
# needs-matching-clang
# This test makes sure that cross-language inlining can be used in conjunction
# with profile-guided optimization. The test only tests that the whole workflow
# can be executed without anything crashing. It does not test whether PGO or
# xLTO have any specific effect on the generated code.
include ../tools.mk
COMMON_FLAGS=-Copt-level=3 -Ccodegen-units=1
# LLVM doesn't support instrumenting binaries that use SEH:
# https://bugs.llvm.org/show_bug.cgi?id=41279
#
# Things work fine with -Cpanic=abort though.
ifdef IS_MSVC
COMMON_FLAGS+= -Cpanic=abort
endif
all: cpp-executable rust-executable
cpp-executable:
$(RUSTC) -Clinker-plugin-lto=on \
-Cprofile-generate="$(TMPDIR)"/cpp-profdata \
-o "$(TMPDIR)"/librustlib-xlto.a \
$(COMMON_FLAGS) \
./rustlib.rs
$(CLANG) -flto=thin \
-fprofile-generate="$(TMPDIR)"/cpp-profdata \
-fuse-ld=lld \
-L "$(TMPDIR)" \
-lrustlib-xlto \
-o "$(TMPDIR)"/cmain \
-O3 \
./cmain.c
$(TMPDIR)/cmain
# Postprocess the profiling data so it can be used by the compiler
"$(LLVM_BIN_DIR)"/llvm-profdata merge \
-o "$(TMPDIR)"/cpp-profdata/merged.profdata \
"$(TMPDIR)"/cpp-profdata/default_*.profraw
$(RUSTC) -Clinker-plugin-lto=on \
-Cprofile-use="$(TMPDIR)"/cpp-profdata/merged.profdata \
-o "$(TMPDIR)"/librustlib-xlto.a \
$(COMMON_FLAGS) \
./rustlib.rs
$(CLANG) -flto=thin \
-fprofile-use="$(TMPDIR)"/cpp-profdata/merged.profdata \
-fuse-ld=lld \
-L "$(TMPDIR)" \
-lrustlib-xlto \
-o "$(TMPDIR)"/cmain \
-O3 \
./cmain.c
rust-executable:
exit
$(CLANG) ./clib.c -fprofile-generate="$(TMPDIR)"/rs-profdata -flto=thin -c -o $(TMPDIR)/clib.o -O3
(cd $(TMPDIR); $(AR) crus ./libxyz.a ./clib.o)
$(RUSTC) -Clinker-plugin-lto=on \
-Cprofile-generate="$(TMPDIR)"/rs-profdata \
-L$(TMPDIR) \
$(COMMON_FLAGS) \
-Clinker=$(CLANG) \
-Clink-arg=-fuse-ld=lld \
-o $(TMPDIR)/rsmain \
./main.rs
$(TMPDIR)/rsmain
# Postprocess the profiling data so it can be used by the compiler
"$(LLVM_BIN_DIR)"/llvm-profdata merge \
-o "$(TMPDIR)"/rs-profdata/merged.profdata \
"$(TMPDIR)"/rs-profdata/default_*.profraw
$(CLANG) ./clib.c \
-fprofile-use="$(TMPDIR)"/rs-profdata/merged.profdata \
-flto=thin \
-c \
-o $(TMPDIR)/clib.o \
-O3
rm "$(TMPDIR)"/libxyz.a
(cd $(TMPDIR); $(AR) crus ./libxyz.a ./clib.o)
$(RUSTC) -Clinker-plugin-lto=on \
-Cprofile-use="$(TMPDIR)"/rs-profdata/merged.profdata \
-L$(TMPDIR) \
$(COMMON_FLAGS) \
-Clinker=$(CLANG) \
-Clink-arg=-fuse-ld=lld \
-o $(TMPDIR)/rsmain \
./main.rs
|
