llvm/test/Transforms/FunctionAttrs/2008-09-03-ReadNone.ll
James Molloy 29020c0a61 Revert "Revert "[FunctionAttrs] Identify norecurse functions""
This reapplies this patch, with test fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252871 91177308-0d34-0410-b5e6-96231b3b80d8
2015-11-12 10:55:20 +00:00

26 lines
510 B
LLVM

; RUN: opt < %s -basicaa -functionattrs -S | FileCheck %s
@x = global i32 0
; CHECK: declare i32 @e() #0
declare i32 @e() readnone
; CHECK: define i32 @f() #0
define i32 @f() {
%tmp = call i32 @e( ) ; <i32> [#uses=1]
ret i32 %tmp
}
; CHECK: define i32 @g() #1
define i32 @g() readonly {
ret i32 0
}
; CHECK: define i32 @h() #1
define i32 @h() readnone {
%tmp = load i32, i32* @x ; <i32> [#uses=1]
ret i32 %tmp
}
; CHECK: attributes #0 = { readnone }
; CHECK: attributes #1 = { norecurse readnone }