mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-21 02:29:22 +00:00
7c9c6ed761
Essentially the same as the GEP change in r230786.
A similar migration script can be used to update test cases, though a few more
test case improvements/changes were required this time around: (r229269-r229278)
import fileinput
import sys
import re
pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)")
for line in sys.stdin:
sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line))
Reviewers: rafael, dexonsmith, grosser
Differential Revision: http://reviews.llvm.org/D7649
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230794 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
695 B
LLVM
24 lines
695 B
LLVM
; This testcase tests for a problem where LICM hoists loads out of a loop
|
|
; despite the fact that calls to unknown functions may modify what is being
|
|
; loaded from. Basically if the load gets hoisted, the subtract gets turned
|
|
; into a constant zero.
|
|
;
|
|
; RUN: opt < %s -licm -gvn -instcombine -S | grep load
|
|
|
|
@X = global i32 7 ; <i32*> [#uses=2]
|
|
|
|
declare void @foo()
|
|
|
|
define i32 @test(i1 %c) {
|
|
%A = load i32, i32* @X ; <i32> [#uses=1]
|
|
br label %Loop
|
|
Loop: ; preds = %Loop, %0
|
|
call void @foo( )
|
|
;; Should not hoist this load!
|
|
%B = load i32, i32* @X ; <i32> [#uses=1]
|
|
br i1 %c, label %Loop, label %Out
|
|
Out: ; preds = %Loop
|
|
%C = sub i32 %A, %B ; <i32> [#uses=1]
|
|
ret i32 %C
|
|
}
|