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39 lines
1.5 KiB
39 lines
1.5 KiB
4 months ago
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; RUN: llvm-as < %s | llvm-dis > %t1.ll
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; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
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; RUN: diff %t1.ll %t2.ll
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; Demonstrate all of the variable argument handling intrinsic functions plus
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; the va_arg instruction.
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declare void @llvm.va_start(i8*)
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declare void @llvm.va_copy(i8*, i8*)
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declare void @llvm.va_end(i8*)
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define i32 @test(i32 %X, ...) {
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; Allocate two va_list items. On this target, va_list is of type sbyte*
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%ap = alloca i8* ; <i8**> [#uses=4]
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%aq = alloca i8* ; <i8**> [#uses=2]
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; Initialize variable argument processing
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%va.upgrd.1 = bitcast i8** %ap to i8* ; <i8*> [#uses=1]
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call void @llvm.va_start( i8* %va.upgrd.1 )
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; Read a single integer argument
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%tmp = va_arg i8** %ap, i32 ; <i32> [#uses=1]
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; Demonstrate usage of llvm.va_copy and llvm_va_end
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%apv = load i8*, i8** %ap ; <i8*> [#uses=1]
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%va0.upgrd.2 = bitcast i8** %aq to i8* ; <i8*> [#uses=1]
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%va1.upgrd.3 = bitcast i8* %apv to i8* ; <i8*> [#uses=1]
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call void @llvm.va_copy( i8* %va0.upgrd.2, i8* %va1.upgrd.3 )
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%va.upgrd.4 = bitcast i8** %aq to i8* ; <i8*> [#uses=1]
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call void @llvm.va_end( i8* %va.upgrd.4 )
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; Stop processing of arguments.
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%va.upgrd.5 = bitcast i8** %ap to i8* ; <i8*> [#uses=1]
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call void @llvm.va_end( i8* %va.upgrd.5 )
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ret i32 %tmp
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}
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