mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
685edd3002
In particular, this preserves the kill flag, which allows the Thumb2 cbn?z optimization to be applied in cases where a branch has been re-created after the live variables analysis pass, e.g. by the machine block placement pass. This appears to be low risk; a number of other targets seem to already be doing something similar, e.g. AArch64, PowerPC. Differential Revision: http://reviews.llvm.org/D9184 llvm-svn: 235639
64 lines
1.3 KiB
LLVM
64 lines
1.3 KiB
LLVM
; RUN: llc < %s -mtriple=thumbv8 -arm-atomic-cfg-tidy=0 | FileCheck %s
|
|
; RUN: llc < %s -mtriple=thumbv7 -arm-atomic-cfg-tidy=0 -arm-restrict-it | FileCheck %s
|
|
; CHECK: it ne
|
|
; CHECK-NEXT: cmpne
|
|
; CHECK-NEXT: bne [[JUMPTARGET:.LBB[0-9]+_[0-9]+]]
|
|
; CHECK: cbz
|
|
; CHECK-NEXT: %if.else163
|
|
; CHECK-NEXT: mov.w
|
|
; CHECK-NEXT: b
|
|
; CHECK-NEXT: %if.else145
|
|
; CHECK-NEXT: mov.w
|
|
; CHECK: [[JUMPTARGET]]:{{.*}}%if.else173
|
|
|
|
%struct.hc = type { i32, i32, i32, i32 }
|
|
|
|
define i32 @t(i32 %type) optsize {
|
|
entry:
|
|
br i1 undef, label %if.then, label %if.else
|
|
|
|
if.then:
|
|
unreachable
|
|
|
|
if.else:
|
|
br i1 undef, label %if.then15, label %if.else18
|
|
|
|
if.then15:
|
|
unreachable
|
|
|
|
if.else18:
|
|
switch i32 %type, label %if.else173 [
|
|
i32 3, label %if.then115
|
|
i32 1, label %if.then102
|
|
]
|
|
|
|
if.then102:
|
|
br i1 undef, label %cond.true10.i, label %t.exit
|
|
|
|
cond.true10.i:
|
|
br label %t.exit
|
|
|
|
t.exit:
|
|
unreachable
|
|
|
|
if.then115:
|
|
br i1 undef, label %if.else163, label %if.else145
|
|
|
|
if.else145:
|
|
%call150 = call fastcc %struct.hc* @foo(%struct.hc* undef, i32 34865152) optsize
|
|
br label %while.body172
|
|
|
|
if.else163:
|
|
%call168 = call fastcc %struct.hc* @foo(%struct.hc* undef, i32 34078720) optsize
|
|
br label %while.body172
|
|
|
|
while.body172:
|
|
br label %while.body172
|
|
|
|
if.else173:
|
|
ret i32 -1
|
|
}
|
|
|
|
declare hidden fastcc %struct.hc* @foo(%struct.hc* nocapture, i32) nounwind optsize
|
|
|