forked from llvm/llvm-project
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathindex-const-prop2.ll
105 lines (90 loc) · 3.72 KB
/
index-const-prop2.ll
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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
; Check constant propagation in thinlto combined summary. This allows us to do 2 things:
; 1. Internalize global definition which is not used externally if all accesses to it are read-only
; 2. Make a local copy of internal definition if all accesses to it are readonly. This allows constant
; folding it during optimziation phase.
; RUN: opt -module-summary %s -o %t1.bc
; RUN: opt -module-summary %p/Inputs/index-const-prop.ll -o %t2.bc
; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \
; RUN: -r=%t2.bc,foo,pl \
; RUN: -r=%t2.bc,bar,pl \
; RUN: -r=%t2.bc,baz,pl \
; RUN: -r=%t2.bc,rand, \
; RUN: -r=%t2.bc,gBar,pl \
; RUN: -r=%t1.bc,main,plx \
; RUN: -r=%t1.bc,main2,pl \
; RUN: -r=%t1.bc,foo, \
; RUN: -r=%t1.bc,bar, \
; RUN: -r=%t1.bc,baz, \
; RUN: -r=%t1.bc,gBar, \
; RUN: -o %t3
; RUN: llvm-dis %t3.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT
; RUN: llvm-dis %t3.1.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN
; Now check that we won't internalize global (gBar) if it's externally referenced
; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \
; RUN: -r=%t2.bc,foo,pl \
; RUN: -r=%t2.bc,bar,pl \
; RUN: -r=%t2.bc,baz,pl \
; RUN: -r=%t2.bc,rand, \
; RUN: -r=%t2.bc,gBar,plx \
; RUN: -r=%t1.bc,main,plx \
; RUN: -r=%t1.bc,main2,pl \
; RUN: -r=%t1.bc,foo, \
; RUN: -r=%t1.bc,bar, \
; RUN: -r=%t1.bc,baz, \
; RUN: -r=%t1.bc,gBar, \
; RUN: -o %t4
; RUN: llvm-dis %t4.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT2
; Run again but with main2 exported instead of main to check that write only
; variables are optimized out.
; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \
; RUN: -r=%t2.bc,foo,pl \
; RUN: -r=%t2.bc,bar,pl \
; RUN: -r=%t2.bc,baz,pl \
; RUN: -r=%t2.bc,rand, \
; RUN: -r=%t2.bc,gBar,pl \
; RUN: -r=%t1.bc,main,pl \
; RUN: -r=%t1.bc,main2,plx \
; RUN: -r=%t1.bc,foo, \
; RUN: -r=%t1.bc,bar, \
; RUN: -r=%t1.bc,baz, \
; RUN: -r=%t1.bc,gBar, \
; RUN: -o %t5
; RUN: llvm-dis %t5.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT-WRITEONLY
; RUN: llvm-dis %t5.1.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN2
; Check that gFoo and gBar were eliminated from source module together
; with corresponsing stores
; RUN: llvm-dis %t5.2.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN2-SRC
; IMPORT: @gBar = internal local_unnamed_addr global i32 2, align 4
; IMPORT-NEXT: @gFoo.llvm.0 = internal unnamed_addr global i32 1, align 4
; IMPORT: !DICompileUnit({{.*}})
; Write only variables are imported with a zero initializer.
; IMPORT-WRITEONLY: @gBar = internal local_unnamed_addr global i32 0
; IMPORT-WRITEONLY: @gFoo.llvm.0 = internal unnamed_addr global i32 0
; CODEGEN: i32 @main()
; CODEGEN-NEXT: ret i32 3
; IMPORT2: @gBar = available_externally local_unnamed_addr global i32 2, align 4
; CODEGEN2: i32 @main2
; CODEGEN2-NEXT: %1 = tail call i32 @rand()
; CODEGEN2-NEXT: %2 = tail call i32 @rand()
; CODEGEN2-NEXT: ret i32 0
; CODEGEN2-SRC: void @baz()
; CODEGEN2-SRC-NEXT: %1 = tail call i32 @rand()
; CODEGEN2-SRC-NEXT: %2 = tail call i32 @rand()
; CODEGEN2-SRC-NEXT: ret void
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"
; We should be able to link external definition of gBar to its declaration
@gBar = external global i32
define i32 @main() local_unnamed_addr {
%call = tail call i32 bitcast (i32 (...)* @foo to i32 ()*)()
%call1 = tail call i32 bitcast (i32 (...)* @bar to i32 ()*)()
%add = add nsw i32 %call1, %call
ret i32 %add
}
define i32 @main2() local_unnamed_addr {
tail call void @baz()
ret i32 0
}
declare i32 @foo(...) local_unnamed_addr
declare i32 @bar(...) local_unnamed_addr
declare void @baz() local_unnamed_addr