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llvm-mirror/test/Transforms/LoopUnswitch/2012-04-02-IndirectBr.ll
Andrew Trick 7230fee696 Fix 12513: Loop unrolling breaks with indirect branches.
Take this opportunity to generalize the indirectbr bailout logic for
loop transformations. CFG transformations will never get indirectbr
right, and there's no point trying.

llvm-svn: 154386
2012-04-10 05:14:42 +00:00

42 lines
1.3 KiB
LLVM

; RUN: opt < %s -S -loop-unswitch -verify-loop-info -verify-dom-info | FileCheck %s
; PR12343: -loop-unswitch crash on indirect branch
; CHECK: %0 = icmp eq i64 undef, 0
; CHECK-NEXT: br i1 %0, label %"5", label %"4"
; CHECK: "5": ; preds = %entry
; CHECK-NEXT: br label %"16"
; CHECK: "16": ; preds = %"22", %"5"
; 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
}