mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-25 19:29:53 +00:00
aad9c3f17a
http://llvm.org/bugs/show_bug.cgi?id=12343 We have not trivial way for splitting edges that are goes from indirect branch. We can do it with some tricks, but it should be additionally discussed. And it is still dangerous due to difficulty of indirect branches controlling. Fix forbids this case for unswitching. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153879 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.6 KiB
LLVM
47 lines
1.6 KiB
LLVM
; RUN: opt -loop-unswitch -disable-output -stats -info-output-file - < %s | FileCheck --check-prefix=STATS %s
|
|
; RUN: opt -S -loop-unswitch -verify-loop-info -verify-dom-info %s | FileCheck %s
|
|
|
|
; STATS: 1 loop-unswitch - Total number of instructions analyzed
|
|
|
|
; CHECK: %0 = icmp eq i64 undef, 0
|
|
; CHECK-NEXT: br i1 %0, label %"5", label %"4"
|
|
|
|
; CHECK: "5": ; preds = %entry
|
|
; CHECK-NEXT: br label %"5.split"
|
|
|
|
; CHECK: "5.split": ; preds = %"5"
|
|
; CHECK-NEXT: br label %"16"
|
|
|
|
; CHECK: "16": ; preds = %"22", %"5.split"
|
|
; CHECK-NEXT: indirectbr i8* undef, [label %"22", label %"33"]
|
|
|
|
; CHECK: "22": ; preds = %"16"
|
|
; CHECK-NEXT: br i1 %0, label %"16", label %"26"
|
|
|
|
; CHECK: "26": ; preds = %"22"
|
|
; CHECK-NEXT: unreachable
|
|
|
|
define void @foo() {
|
|
entry:
|
|
%0 = icmp eq i64 undef, 0
|
|
br i1 %0, label %"5", label %"4"
|
|
|
|
"4": ; preds = %entry
|
|
unreachable
|
|
|
|
"5": ; preds = %entry
|
|
br label %"16"
|
|
|
|
"16": ; preds = %"22", %"5"
|
|
indirectbr i8* undef, [label %"22", label %"33"]
|
|
|
|
"22": ; preds = %"16"
|
|
br i1 %0, label %"16", label %"26"
|
|
|
|
"26": ; preds = %"22"
|
|
unreachable
|
|
|
|
"33": ; preds = %"16"
|
|
unreachable
|
|
}
|