derek.holloway
7502bf64a4
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43 lines
1.2 KiB
LLVM
43 lines
1.2 KiB
LLVM
; RUN: opt -passes=function-attrs -S < %s | FileCheck %s
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; This checks for a previously existing iterator wraparound bug in
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; FunctionAttrs, and in the process covers corner cases with varargs.
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declare void @llvm.va_start(ptr)
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declare void @llvm.va_end(ptr)
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define void @va_func(ptr readonly %b, ...) readonly nounwind willreturn {
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; CHECK-LABEL: define void @va_func(ptr readonly captures(none) %b, ...)
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entry:
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%valist = alloca i8
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call void @llvm.va_start(ptr %valist)
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call void @llvm.va_end(ptr %valist)
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%x = call i32 @caller(ptr %b)
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ret void
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}
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define i32 @caller(ptr %x) {
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; CHECK-LABEL: define noundef i32 @caller(ptr readonly captures(address) %x)
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entry:
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call void(ptr,...) @va_func(ptr null, i32 0, i32 0, i32 0, ptr %x)
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ret i32 42
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}
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define void @va_func2(ptr readonly %b, ...) {
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; CHECK-LABEL: define void @va_func2(ptr readonly captures(address) %b, ...)
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entry:
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%valist = alloca i8
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call void @llvm.va_start(ptr %valist)
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call void @llvm.va_end(ptr %valist)
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%x = call i32 @caller(ptr %b)
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ret void
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}
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define i32 @caller2(ptr %x, ptr %y) {
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; CHECK-LABEL: define noundef i32 @caller2(ptr readonly captures(address) %x, ptr %y)
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entry:
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call void(ptr,...) @va_func2(ptr %x, i32 0, i32 0, i32 0, ptr %y)
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ret i32 42
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}
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