65beddafe8
Unfortunately, while doing this I found that it doesn't actually apply in any real-world programs (tested with `make smoketest`), apparently because nil pointer checking messes with the functionattrs pass. I hope to fix that after moving to LLVM 9, which has an optimization that makes nil pointer checking easier to implement.
24 строки
753 Б
LLVM
24 строки
753 Б
LLVM
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64--linux"
|
|
|
|
@str = constant [6 x i8] c"foobar"
|
|
|
|
declare { i8*, i64, i64 } @runtime.stringToBytes(i8*, i64)
|
|
|
|
declare void @printSlice(i8* nocapture readonly, i64, i64)
|
|
|
|
declare void @writeToSlice(i8* nocapture, i64, i64)
|
|
|
|
define void @testReadOnly() {
|
|
entry:
|
|
call fastcc void @printSlice(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @str, i32 0, i32 0), i64 6, i64 6)
|
|
ret void
|
|
}
|
|
|
|
define void @testReadWrite() {
|
|
entry:
|
|
%0 = call fastcc { i8*, i64, i64 } @runtime.stringToBytes(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @str, i32 0, i32 0), i64 6)
|
|
%1 = extractvalue { i8*, i64, i64 } %0, 0
|
|
call fastcc void @writeToSlice(i8* %1, i64 6, i64 6)
|
|
ret void
|
|
}
|