mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-30 15:32:52 +01:00
d0b90ac5a7
DAGCombiner was counting all uses of a load node when considering whether it's worth combining into a zextload. Really, it wants to ignore the chain and just count real uses. rdar://problem/13896307 llvm-svn: 185419
17 lines
448 B
LLVM
17 lines
448 B
LLVM
; RUN: llc -mtriple=x86_64-apple-darwin < %s| FileCheck %s
|
|
|
|
; A bug in DAGCombiner prevented it forming a zextload in this simple case
|
|
; because it counted both the chain user and the real user against the
|
|
; profitability total.
|
|
|
|
define void @load_zext(i32* nocapture %p){
|
|
entry:
|
|
%0 = load i32* %p, align 4
|
|
%and = and i32 %0, 255
|
|
tail call void @use(i32 %and)
|
|
ret void
|
|
; CHECK: movzbl ({{%r[a-z]+}}), {{%e[a-z]+}}
|
|
}
|
|
|
|
declare void @use(i32)
|