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comparison test/Feature/varargs_new.ll @ 0:95c75e76d11b

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
parents
children afa8332a0e37
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-1:000000000000 0:95c75e76d11b
1 ; RUN: llvm-as < %s | llvm-dis > %t1.ll
2 ; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
3 ; RUN: diff %t1.ll %t2.ll
4
5 ; Demonstrate all of the variable argument handling intrinsic functions plus
6 ; the va_arg instruction.
7
8 declare void @llvm.va_start(i8*)
9
10 declare void @llvm.va_copy(i8*, i8*)
11
12 declare void @llvm.va_end(i8*)
13
14 define i32 @test(i32 %X, ...) {
15 ; Allocate two va_list items. On this target, va_list is of type sbyte*
16 %ap = alloca i8* ; <i8**> [#uses=4]
17 %aq = alloca i8* ; <i8**> [#uses=2]
18
19 ; Initialize variable argument processing
20 %va.upgrd.1 = bitcast i8** %ap to i8* ; <i8*> [#uses=1]
21 call void @llvm.va_start( i8* %va.upgrd.1 )
22
23 ; Read a single integer argument
24 %tmp = va_arg i8** %ap, i32 ; <i32> [#uses=1]
25
26 ; Demonstrate usage of llvm.va_copy and llvm_va_end
27 %apv = load i8** %ap ; <i8*> [#uses=1]
28 %va0.upgrd.2 = bitcast i8** %aq to i8* ; <i8*> [#uses=1]
29 %va1.upgrd.3 = bitcast i8* %apv to i8* ; <i8*> [#uses=1]
30 call void @llvm.va_copy( i8* %va0.upgrd.2, i8* %va1.upgrd.3 )
31 %va.upgrd.4 = bitcast i8** %aq to i8* ; <i8*> [#uses=1]
32 call void @llvm.va_end( i8* %va.upgrd.4 )
33
34 ; Stop processing of arguments.
35 %va.upgrd.5 = bitcast i8** %ap to i8* ; <i8*> [#uses=1]
36 call void @llvm.va_end( i8* %va.upgrd.5 )
37 ret i32 %tmp
38 }