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Rip out support for 'llvm.noinline'. This thing has a strange history...

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It was added in 2007 as the first cut at supporting no-inline
attributes, but we didn't have function attributes of any form at the
time. However, it was added without any mention in the LangRef or other
documentation.

Later on, in 2008, Devang added function notes for 'inline=never' and
then turned them into proper function attributes. From that point
onward, as far as I can tell, the world moved on, and no one has touched
'llvm.noinline' in any meaningful way since.

It's time has now come. We have had better mechanisms for doing this for
a long time, all the frontends I'm aware of use them, and this is just
holding back progress. Given that it was never a documented feature of
the IR, I've provided no auto-upgrade support. If people know of real,
in-the-wild bitcode that relies on this, yell at me and I'll add it, but
I *seriously* doubt anyone cares.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152904 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2012-03-16 06:10:15 +00:00
parent f91f5af802
commit b2442fc760
2 changed files with 0 additions and 91 deletions
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46
test/Transforms/Inline/2007-06-06-NoInline.ll
View File

@@ -1,46 +0,0 @@
; RUN: opt < %s -inline -S | grep "define internal i32 @bar"
@llvm.noinline = appending global [1 x i8*] [ i8* bitcast (i32 (i32, i32)* @bar to i8*) ], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0]
define internal i32 @bar(i32 %x, i32 %y) {
entry:
%x_addr = alloca i32 ; <i32*> [#uses=2]
%y_addr = alloca i32 ; <i32*> [#uses=2]
%retval = alloca i32, align 4 ; <i32*> [#uses=2]
%tmp = alloca i32, align 4 ; <i32*> [#uses=2]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
store i32 %x, i32* %x_addr
store i32 %y, i32* %y_addr
%tmp1 = load i32* %x_addr ; <i32> [#uses=1]
%tmp2 = load i32* %y_addr ; <i32> [#uses=1]
%tmp3 = add i32 %tmp1, %tmp2 ; <i32> [#uses=1]
store i32 %tmp3, i32* %tmp
%tmp4 = load i32* %tmp ; <i32> [#uses=1]
store i32 %tmp4, i32* %retval
br label %return
return: ; preds = %entry
%retval5 = load i32* %retval ; <i32> [#uses=1]
ret i32 %retval5
}
define i32 @foo(i32 %a, i32 %b) {
entry:
%a_addr = alloca i32 ; <i32*> [#uses=2]
%b_addr = alloca i32 ; <i32*> [#uses=2]
%retval = alloca i32, align 4 ; <i32*> [#uses=2]
%tmp = alloca i32, align 4 ; <i32*> [#uses=2]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
store i32 %a, i32* %a_addr
store i32 %b, i32* %b_addr
%tmp1 = load i32* %b_addr ; <i32> [#uses=1]
%tmp2 = load i32* %a_addr ; <i32> [#uses=1]
%tmp3 = call i32 @bar( i32 %tmp1, i32 %tmp2 ) ; <i32> [#uses=1]
store i32 %tmp3, i32* %tmp
%tmp4 = load i32* %tmp ; <i32> [#uses=1]
store i32 %tmp4, i32* %retval
br label %return
return: ; preds = %entry
%retval5 = load i32* %retval ; <i32> [#uses=1]
ret i32 %retval5
}