mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-22 07:32:48 +00:00
e78760e179
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8558 91177308-0d34-0410-b5e6-96231b3b80d8
26 lines
765 B
LLVM
26 lines
765 B
LLVM
; Here we have a case where there are two loops and LICM is hoisting an
|
|
; instruction from one loop into the other loop! This is obviously bad and
|
|
; happens because preheader insertion doesn't insert a preheader for this
|
|
; case... bad.
|
|
|
|
; RUN: llvm-as < %s | opt -licm -adce -simplifycfg | llvm-dis | not grep 'br '
|
|
|
|
int %main(int %argc) {
|
|
br label %bb5
|
|
|
|
bb5: ; preds = %bb5, %0
|
|
%I = phi int [0, %0], [%I2, %bb5]
|
|
%I2 = add int %I, 1
|
|
%c = seteq int %I2, 10
|
|
br bool %c, label %bb5, label %bb8
|
|
|
|
bb8: ; preds = %bb8, %bb5
|
|
%cann-indvar = phi uint [ 0, %bb8 ], [ 0, %bb5 ]
|
|
%X = add int %argc, %argc ; Loop invariant
|
|
br bool false, label %bb8, label %bb10
|
|
|
|
bb10: ; preds = %bb8
|
|
ret int %X
|
|
}
|
|
|