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Extend 'readonly' and 'readnone' to work on function arguments as well as

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functions. Make the function attributes pass add it to known library functions
and when it can deduce it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185735 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2013-07-06 00:29:58 +00:00
parent 202eb7b18e
commit dc89737bcd
22 changed files with 547 additions and 86 deletions
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13
test/Transforms/FunctionAttrs/2009-01-02-LocalStores.ll
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@@ -1,14 +1,23 @@
; RUN: opt < %s -functionattrs -S | not grep "nocapture *%%q"
; RUN: opt < %s -functionattrs -S | grep "nocapture *%%p"
; RUN: opt < %s -functionattrs -S | FileCheck %s
; CHECK: define i32* @a(i32** nocapture readonly %p)
define i32* @a(i32** %p) {
%tmp = load i32** %p
ret i32* %tmp
}
; CHECK: define i32* @b(i32* %q)
define i32* @b(i32 *%q) {
%mem = alloca i32*
store i32* %q, i32** %mem
%tmp = call i32* @a(i32** %mem)
ret i32* %tmp
}
; CHECK: define i32* @c(i32* readnone %r)
@g = global i32 0
define i32* @c(i32 *%r) {
%a = icmp eq i32* %r, null
store i32 1, i32* @g
ret i32* %r
}