mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-19 01:13:25 +00:00
8f416f3afd
comments about why we're not getting other cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61032 91177308-0d34-0410-b5e6-96231b3b80d8
40 lines
1.4 KiB
LLVM
40 lines
1.4 KiB
LLVM
; RUN: llvm-as < %s | opt -gvn -enable-load-pre | llvm-dis > %t
|
|
; RUN: %prcontext bb1: 2 < %t | grep phi
|
|
; RUN: %prcontext bb1: 2 < %t | not grep load
|
|
;
|
|
; The partially redundant load in bb1 should be hoisted to "bb". This comes
|
|
; from this C code (GCC PR 23455):
|
|
; unsigned outcnt; extern void flush_outbuf(void);
|
|
; void bi_windup(unsigned char *outbuf, unsigned char bi_buf) {
|
|
; outbuf[outcnt] = bi_buf;
|
|
; if (outcnt == 16384)
|
|
; flush_outbuf();
|
|
; outbuf[outcnt] = bi_buf;
|
|
; }
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
|
|
target triple = "i386-apple-darwin7"
|
|
@outcnt = common global i32 0 ; <i32*> [#uses=3]
|
|
|
|
define void @bi_windup(i8* %outbuf, i8 zeroext %bi_buf) nounwind {
|
|
entry:
|
|
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
|
|
%0 = load i32* @outcnt, align 4 ; <i32> [#uses=1]
|
|
%1 = getelementptr i8* %outbuf, i32 %0 ; <i8*> [#uses=1]
|
|
store i8 %bi_buf, i8* %1, align 1
|
|
%2 = load i32* @outcnt, align 4 ; <i32> [#uses=1]
|
|
%3 = icmp eq i32 %2, 16384 ; <i1> [#uses=1]
|
|
br i1 %3, label %bb, label %bb1
|
|
|
|
bb: ; preds = %entry
|
|
call void @flush_outbuf() nounwind
|
|
br label %bb1
|
|
|
|
bb1: ; preds = %bb, %entry
|
|
%4 = load i32* @outcnt, align 4 ; <i32> [#uses=1]
|
|
%5 = getelementptr i8* %outbuf, i32 %4 ; <i8*> [#uses=1]
|
|
store i8 %bi_buf, i8* %5, align 1
|
|
ret void
|
|
}
|
|
|
|
declare void @flush_outbuf()
|