mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-02-01 05:01:59 +01:00
6212dd268d
Shrink-wrapping uses post-dominators to find a restore point that post-dominates all the uses of CSR / stack. The way dominator trees are modeled in LLVM today is that unreachable blocks are not present in a generic dominator tree, so, an unreachable node is dominated by anything: include/llvm/Support/GenericDomTree.h:467. Since for post-dominators, a no-return block is considered "unreachable", calling findNearestCommonDominator on an unreachable node A and a non-unreachable node B, will return B, which can be false. If we find such node, we bail out since there is no good restore point available. rdar://problem/30186931 llvm-svn: 303130
47 lines
1.1 KiB
LLVM
47 lines
1.1 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: [[JUMPTARGET]]:{{.*}}%if.else173
|
|
; CHECK-NEXT: mov.w
|
|
; CHECK-NEXT: pop
|
|
; CHECK-NEXT: %if.else145
|
|
; CHECK-NEXT: mov.w
|
|
|
|
%struct.hc = type { i32, i32, i32, i32 }
|
|
|
|
define i32 @t(i32 %type) optsize {
|
|
entry:
|
|
switch i32 %type, label %if.else173 [
|
|
i32 13, label %if.then115
|
|
i32 6, label %if.then102
|
|
]
|
|
|
|
if.then102:
|
|
br label %if.then115
|
|
|
|
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
|