mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
bec7dcad14
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2706 91177308-0d34-0410-b5e6-96231b3b80d8
40 lines
762 B
LLVM
40 lines
762 B
LLVM
; This is the test case taken from appel's book that illustrates a hard case
|
|
; that SCCP gets right. BB3 should be completely eliminated.
|
|
;
|
|
; RUN: if as < %s | opt -sccp -constprop -dce -cfgsimplify | dis | grep BB3
|
|
; RUN: then exit 1
|
|
; RUN: else exit 0
|
|
; RUN: fi
|
|
|
|
int "test function"(int %i0, int %j0)
|
|
begin
|
|
BB1:
|
|
br label %BB2
|
|
BB2:
|
|
%j2 = phi int [%j4, %BB7], [1, %BB1]
|
|
%k2 = phi int [%k4, %BB7], [0, %BB1]
|
|
%kcond = setlt int %k2, 100
|
|
br bool %kcond, label %BB3, label %BB4
|
|
|
|
BB3:
|
|
%jcond = setlt int %j2, 20
|
|
br bool %jcond, label %BB5, label %BB6
|
|
|
|
BB4:
|
|
ret int %j2
|
|
|
|
BB5:
|
|
%k3 = add int %k2, 1
|
|
br label %BB7
|
|
|
|
BB6:
|
|
%k5 = add int %k2, 1
|
|
br label %BB7
|
|
|
|
BB7:
|
|
%j4 = phi int [1, %BB5], [%k2, %BB6]
|
|
%k4 = phi int [%k3, %BB5], [%k5, %BB6]
|
|
br label %BB2
|
|
end
|
|
|