1 ; Test that simplifycfg can create switch instructions from constant pointers.
3 ; RUN: opt < %s -simplifycfg -S | FileCheck %s
5 target datalayout = "e-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
6 target triple = "x86_64-apple-darwin10.0.0"
8 @.str = private constant [5 x i8] c"null\00" ; <[5 x i8]*> [#uses=2]
9 @.str1 = private constant [4 x i8] c"one\00" ; <[4 x i8]*> [#uses=2]
10 @.str2 = private constant [4 x i8] c"two\00" ; <[4 x i8]*> [#uses=2]
11 @.str3 = private constant [5 x i8] c"four\00" ; <[5 x i8]*> [#uses=2]
13 @.str_as1 = private addrspace(1) constant [5 x i8] c"null\00" ; <[5 x i8]*> [#uses=2]
14 @.str1_as1 = private addrspace(1) constant [4 x i8] c"one\00" ; <[4 x i8]*> [#uses=2]
15 @.str2_as1 = private addrspace(1) constant [4 x i8] c"two\00" ; <[4 x i8]*> [#uses=2]
16 @.str3_as1 = private addrspace(1) constant [5 x i8] c"four\00" ; <[5 x i8]*> [#uses=2]
18 declare i32 @puts(i8*)
19 declare i32 @puts_as1(i8 addrspace(1)*)
21 define void @f(i8* %x) nounwind ssp {
23 ; CHECK: switch i64 %magicptr
32 %tobool = icmp eq i8* %x, null ; <i1> [#uses=1]
33 br i1 %tobool, label %if.then, label %if.else
35 if.then: ; preds = %entry
36 %call = call i32 @puts(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0)) nounwind ; <i32> [#uses=0]
39 if.else: ; preds = %entry
40 %cmp = icmp eq i8* %x, inttoptr (i64 1 to i8*) ; <i1> [#uses=1]
41 br i1 %cmp, label %if.then2, label %if.else4
43 if.then2: ; preds = %if.else
44 %call3 = call i32 @puts(i8* getelementptr inbounds ([4 x i8]* @.str1, i64 0, i64 0)) nounwind ; <i32> [#uses=0]
47 if.else4: ; preds = %if.else
48 %cmp6 = icmp eq i8* %x, inttoptr (i64 2 to i8*) ; <i1> [#uses=1]
49 br i1 %cmp6, label %if.then9, label %lor.lhs.false
51 lor.lhs.false: ; preds = %if.else4
52 %cmp8 = icmp eq i8* %x, inttoptr (i64 3 to i8*) ; <i1> [#uses=1]
53 br i1 %cmp8, label %if.then9, label %if.else11
55 if.then9: ; preds = %lor.lhs.false, %if.else4
56 %call10 = call i32 @puts(i8* getelementptr inbounds ([4 x i8]* @.str2, i64 0, i64 0)) nounwind ; <i32> [#uses=0]
59 if.else11: ; preds = %lor.lhs.false
60 %cmp13 = icmp eq i8* %x, inttoptr (i64 4 to i8*) ; <i1> [#uses=1]
61 br i1 %cmp13, label %if.then14, label %if.else16
63 if.then14: ; preds = %if.else11
64 %call15 = call i32 @puts(i8* getelementptr inbounds ([5 x i8]* @.str3, i64 0, i64 0)) nounwind ; <i32> [#uses=0]
67 if.else16: ; preds = %if.else11
68 %call18 = call i32 @puts(i8* %x) nounwind ; <i32> [#uses=0]
71 if.end: ; preds = %if.else16, %if.then14
74 if.end19: ; preds = %if.end, %if.then9
77 if.end20: ; preds = %if.end19, %if.then2
80 if.end21: ; preds = %if.end20, %if.then
84 ; Is it useful to test a version where the ptrtoints are to the same
86 define void @f_as1(i8 addrspace(1)* %x) nounwind ssp {
87 ; CHECK-LABEL: @f_as1(
88 ; CHECK: ptrtoint i8 addrspace(1)* %x to i16
89 ; CHECK: switch i16 %magicptr
98 %tobool = icmp eq i8 addrspace(1)* %x, null ; <i1> [#uses=1]
99 br i1 %tobool, label %if.then, label %if.else
101 if.then: ; preds = %entry
102 %call = call i32 @puts_as1(i8 addrspace(1)* getelementptr inbounds ([5 x i8] addrspace(1)* @.str_as1, i64 0, i64 0)) nounwind ; <i32> [#uses=0]
105 if.else: ; preds = %entry
106 %cmp = icmp eq i8 addrspace(1)* %x, inttoptr (i64 1 to i8 addrspace(1)*) ; <i1> [#uses=1]
107 br i1 %cmp, label %if.then2, label %if.else4
109 if.then2: ; preds = %if.else
110 %call3 = call i32 @puts_as1(i8 addrspace(1)* getelementptr inbounds ([4 x i8] addrspace(1)* @.str1_as1, i64 0, i64 0)) nounwind ; <i32> [#uses=0]
113 if.else4: ; preds = %if.else
114 %cmp6 = icmp eq i8 addrspace(1)* %x, inttoptr (i64 2 to i8 addrspace(1)*) ; <i1> [#uses=1]
115 br i1 %cmp6, label %if.then9, label %lor.lhs.false
117 lor.lhs.false: ; preds = %if.else4
118 %cmp8 = icmp eq i8 addrspace(1)* %x, inttoptr (i64 3 to i8 addrspace(1)*) ; <i1> [#uses=1]
119 br i1 %cmp8, label %if.then9, label %if.else11
121 if.then9: ; preds = %lor.lhs.false, %if.else4
122 %call10 = call i32 @puts_as1(i8 addrspace(1)* getelementptr inbounds ([4 x i8] addrspace(1)* @.str2_as1, i64 0, i64 0)) nounwind ; <i32> [#uses=0]
125 if.else11: ; preds = %lor.lhs.false
126 %cmp13 = icmp eq i8 addrspace(1)* %x, inttoptr (i64 4 to i8 addrspace(1)*) ; <i1> [#uses=1]
127 br i1 %cmp13, label %if.then14, label %if.else16
129 if.then14: ; preds = %if.else11
130 %call15 = call i32 @puts_as1(i8 addrspace(1)* getelementptr inbounds ([5 x i8] addrspace(1)* @.str3_as1, i64 0, i64 0)) nounwind ; <i32> [#uses=0]
133 if.else16: ; preds = %if.else11
134 %call18 = call i32 @puts_as1(i8 addrspace(1)* %x) nounwind ; <i32> [#uses=0]
137 if.end: ; preds = %if.else16, %if.then14
140 if.end19: ; preds = %if.end, %if.then9
143 if.end20: ; preds = %if.end19, %if.then2
146 if.end21: ; preds = %if.end20, %if.then