1 ; RUN: opt < %s -functionattrs -S | FileCheck %s
2 @g = global i32* null ; <i32**> [#uses=1]
4 ; CHECK: define i32* @c1(i32* %q)
5 define i32* @c1(i32* %q) {
9 ; CHECK: define void @c2(i32* %q)
10 define void @c2(i32* %q) {
11 store i32* %q, i32** @g
15 ; CHECK: define void @c3(i32* %q)
16 define void @c3(i32* %q) {
17 call void @c2(i32* %q)
21 ; CHECK: define i1 @c4(i32* %q, i32 %bitno)
22 define i1 @c4(i32* %q, i32 %bitno) {
23 %tmp = ptrtoint i32* %q to i32
24 %tmp2 = lshr i32 %tmp, %bitno
25 %bit = trunc i32 %tmp2 to i1
26 br i1 %bit, label %l1, label %l0
28 ret i1 0 ; escaping value not caught by def-use chaining.
30 ret i1 1 ; escaping value not caught by def-use chaining.
33 @lookup_table = global [2 x i1] [ i1 0, i1 1 ]
35 ; CHECK: define i1 @c5(i32* %q, i32 %bitno)
36 define i1 @c5(i32* %q, i32 %bitno) {
37 %tmp = ptrtoint i32* %q to i32
38 %tmp2 = lshr i32 %tmp, %bitno
39 %bit = and i32 %tmp2, 1
40 ; subtle escape mechanism follows
41 %lookup = getelementptr [2 x i1]* @lookup_table, i32 0, i32 %bit
42 %val = load i1* %lookup
46 declare void @throw_if_bit_set(i8*, i8) readonly
48 ; CHECK: define i1 @c6(i8* %q, i8 %bit)
49 define i1 @c6(i8* %q, i8 %bit) {
50 invoke void @throw_if_bit_set(i8* %q, i8 %bit)
51 to label %ret0 unwind label %ret1
55 %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
60 declare i32 @__gxx_personality_v0(...)
62 define i1* @lookup_bit(i32* %q, i32 %bitno) readnone nounwind {
63 %tmp = ptrtoint i32* %q to i32
64 %tmp2 = lshr i32 %tmp, %bitno
65 %bit = and i32 %tmp2, 1
66 %lookup = getelementptr [2 x i1]* @lookup_table, i32 0, i32 %bit
70 ; CHECK: define i1 @c7(i32* %q, i32 %bitno)
71 define i1 @c7(i32* %q, i32 %bitno) {
72 %ptr = call i1* @lookup_bit(i32* %q, i32 %bitno)
78 ; CHECK: define i32 @nc1(i32* %q, i32* nocapture %p, i1 %b)
79 define i32 @nc1(i32* %q, i32* %p, i1 %b) {
83 %x = phi i32* [ %p, %e ]
84 %y = phi i32* [ %q, %e ]
85 %tmp = bitcast i32* %x to i32* ; <i32*> [#uses=2]
86 %tmp2 = select i1 %b, i32* %tmp, i32* %y
87 %val = load i32* %tmp2 ; <i32> [#uses=1]
88 store i32 0, i32* %tmp
89 store i32* %y, i32** @g
93 ; CHECK: define void @nc2(i32* nocapture %p, i32* %q)
94 define void @nc2(i32* %p, i32* %q) {
95 %1 = call i32 @nc1(i32* %q, i32* %p, i1 0) ; <i32> [#uses=0]
99 ; CHECK: define void @nc3(void ()* nocapture %p)
100 define void @nc3(void ()* %p) {
105 declare void @external(i8*) readonly nounwind
106 ; CHECK: define void @nc4(i8* nocapture %p)
107 define void @nc4(i8* %p) {
108 call void @external(i8* %p)
112 ; CHECK: define void @nc5(void (i8*)* nocapture %f, i8* nocapture %p)
113 define void @nc5(void (i8*)* %f, i8* %p) {
114 call void %f(i8* %p) readonly nounwind
115 call void %f(i8* nocapture %p)