56 lines
1.0 KiB
LLVM
56 lines
1.0 KiB
LLVM
; RUN: opt -loop-unroll -verify-loop-lcssa -S < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
@b = external local_unnamed_addr global i32, align 4
|
|
|
|
; CHECK-LABEL: @main
|
|
; CHECK: exit.loopexit:
|
|
; CHECK: {{.*}} = phi i32 [ %d.0, %h3 ]
|
|
; CHECK: br label %exit
|
|
; CHECK: exit.loopexit1:
|
|
; CHECK: {{.*}} = phi i32 [ %d.0, %h3.1 ]
|
|
; CHECK: br label %exit
|
|
|
|
define void @main() local_unnamed_addr #0 {
|
|
ph1:
|
|
br label %h1
|
|
|
|
h1:
|
|
%d.0 = phi i32 [ %1, %latch1 ], [ undef, %ph1 ]
|
|
br label %ph2
|
|
|
|
ph2:
|
|
br label %h2
|
|
|
|
h2:
|
|
%0 = phi i32 [ 0, %ph2 ], [ %inc, %latch2 ]
|
|
br label %h3
|
|
|
|
h3:
|
|
br i1 undef, label %latch3, label %exit
|
|
|
|
latch3:
|
|
br i1 false, label %exit3, label %h3
|
|
|
|
exit3:
|
|
br label %latch2
|
|
|
|
latch2:
|
|
%inc = add nuw nsw i32 %0, 1
|
|
%cmp = icmp slt i32 %inc, 2
|
|
br i1 %cmp, label %h2, label %exit2
|
|
|
|
exit2:
|
|
br i1 undef, label %latch1, label %ph2
|
|
|
|
latch1: ; preds = %exit2
|
|
%1 = load i32, i32* @b, align 4
|
|
br label %h1
|
|
|
|
exit:
|
|
%d.0.lcssa = phi i32 [ %d.0, %h3 ]
|
|
ret void
|
|
}
|