mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-08 19:29:45 +00:00
9a036b945c
callgraph, when one member of a SCC calls another then the analysis would drop to mod-ref because there is (usually) no function info for the callee yet; fix this. Teach the analysis about function attributes, in particular the readonly attribute (which requires being careful about globals). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55696 91177308-0d34-0410-b5e6-96231b3b80d8
19 lines
401 B
LLVM
19 lines
401 B
LLVM
; RUN: llvm-as < %s | opt -globalsmodref-aa -gvn | llvm-dis | grep call | count 2
|
|
|
|
@g = internal global i32 0 ; <i32*> [#uses=2]
|
|
|
|
define i32 @r() {
|
|
%tmp = load i32* @g ; <i32> [#uses=1]
|
|
ret i32 %tmp
|
|
}
|
|
|
|
define i32 @f() {
|
|
entry:
|
|
%tmp = call i32 @e( ) ; <i32> [#uses=1]
|
|
store i32 %tmp, i32* @g
|
|
%tmp2 = call i32 @e( ) ; <i32> [#uses=1]
|
|
ret i32 %tmp2
|
|
}
|
|
|
|
declare i32 @e() readonly ; might call @r
|