mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-22 07:32:48 +00:00
69ccadd753
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32115 91177308-0d34-0410-b5e6-96231b3b80d8
46 lines
1.5 KiB
LLVM
46 lines
1.5 KiB
LLVM
; This test checks to see if the CEE pass is applying jump-bypassing for values
|
|
; determined by PHI nodes. Because we are coming from a particular block, we
|
|
; know what value a PHI node will take on this edge and should exploit it.
|
|
;
|
|
; This testcase comes from the following C code:
|
|
; void bar(void);
|
|
; void foo(int c) {
|
|
; int i = c ? 2 : 8;
|
|
; while (i < 20) {
|
|
; bar ();
|
|
; i++;
|
|
; }
|
|
; }
|
|
;
|
|
; RUN: llvm-upgrade < %s | llvm-as | opt -cee -simplifycfg | llvm-dis | not grep bb3
|
|
|
|
implementation
|
|
declare void %bar()
|
|
|
|
void %foo(int %c) {
|
|
bb0: ; No predecessors!
|
|
%cond215 = seteq int %c, 0 ; <bool> [#uses=1]
|
|
br bool %cond215, label %bb3, label %bb4
|
|
|
|
bb3: ; preds = %bb0
|
|
br label %bb4
|
|
|
|
bb4: ; preds = %bb3, %bb0
|
|
%reg110 = phi int [ 8, %bb3 ], [ 2, %bb0 ] ; <int> [#uses=2]
|
|
%cond217 = setgt int %reg110, 19 ; <bool> [#uses=1]
|
|
br bool %cond217, label %bb6, label %bb5
|
|
|
|
bb5: ; preds = %bb5, %bb4
|
|
%cann-indvar = phi int [ 0, %bb4 ], [ %add1-indvar, %bb5 ] ; <int> [#uses=2]
|
|
%add1-indvar = add int %cann-indvar, 1 ; <int> [#uses=1]
|
|
%reg111 = add int %cann-indvar, %reg110 ; <int> [#uses=1]
|
|
call void %bar( )
|
|
%reg112 = add int %reg111, 1 ; <int> [#uses=1]
|
|
%cond222 = setle int %reg112, 19 ; <bool> [#uses=1]
|
|
br bool %cond222, label %bb5, label %bb6
|
|
|
|
bb6: ; preds = %bb5, %bb4
|
|
ret void
|
|
}
|
|
|