llvm-6502/test/Analysis/GlobalsModRef/chaining-analysis.ll
Duncan Sands e4dc717585 Ding dong, the DoesntAccessMemoryFns and
OnlyReadsMemoryFns tables are dead!  We
get more, and more accurate, information
from gcc via the readnone and readonly
function attributes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44288 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-23 19:30:27 +00:00

21 lines
602 B
LLVM

; RUN: llvm-as < %s | opt -globalsmodref-aa -load-vn -gcse | llvm-dis | not grep load
; This test requires the use of previous analyses to determine that
; doesnotmodX does not modify X (because 'sin' doesn't).
@X = internal global i32 4 ; <i32*> [#uses=2]
declare double @sin(double) readnone
define i32 @test(i32* %P) {
store i32 12, i32* @X
call double @doesnotmodX( double 1.000000e+00 ) ; <double>:1 [#uses=0]
%V = load i32* @X ; <i32> [#uses=1]
ret i32 %V
}
define double @doesnotmodX(double %V) {
%V2 = call double @sin( double %V ) readnone ; <double> [#uses=1]
ret double %V2
}