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authorMichael Kuperstein <mkuper@google.com>2016-12-16 21:23:59 +0000
committerMichael Kuperstein <mkuper@google.com>2016-12-16 21:23:59 +0000
commit3ca147ea3d8c2364542c2e4c2b7ba83fdf5e6dcd (patch)
treef56a38a5418f67dc6c144643b9fe52b62cdd780c /llvm/test/Transforms/LoopSimplify
parent35f6d66b0d4da029fbd2d6f97cd9121d59d20322 (diff)
downloadbcm5719-llvm-3ca147ea3d8c2364542c2e4c2b7ba83fdf5e6dcd.tar.gz
bcm5719-llvm-3ca147ea3d8c2364542c2e4c2b7ba83fdf5e6dcd.zip
Preserve loop metadata when folding branches to a common destination.
Differential Revision: https://reviews.llvm.org/D27830 llvm-svn: 289992
Diffstat (limited to 'llvm/test/Transforms/LoopSimplify')
-rw-r--r--llvm/test/Transforms/LoopSimplify/preserve-llvm-loop-metadata.ll28
1 files changed, 28 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopSimplify/preserve-llvm-loop-metadata.ll b/llvm/test/Transforms/LoopSimplify/preserve-llvm-loop-metadata.ll
index bd27794d193..c1397606487 100644
--- a/llvm/test/Transforms/LoopSimplify/preserve-llvm-loop-metadata.ll
+++ b/llvm/test/Transforms/LoopSimplify/preserve-llvm-loop-metadata.ll
@@ -1,5 +1,6 @@
; RUN: opt -loop-simplify -S < %s | FileCheck %s
+; CHECK-LABEL: @test1
define void @test1(i32 %n) {
entry:
br label %while.cond
@@ -35,6 +36,33 @@ while.end: ; preds = %while.cond
; CHECK: if.else
; CHECK-NOT: br {{.*}}!llvm.loop{{.*}}
+; CHECK-LABEL: @test2
+; CHECK: for.body:
+; CHECK: br i1 %{{.*}}, label %for.body, label %cleanup.loopexit, !llvm.loop !0
+define void @test2(i32 %k) {
+entry:
+ %cmp9 = icmp sgt i32 %k, 0
+ br i1 %cmp9, label %for.body.preheader, label %cleanup
+
+for.body.preheader: ; preds = %entry
+ br label %for.body
+
+for.cond: ; preds = %for.body
+ %cmp = icmp slt i32 %inc, %k
+ br i1 %cmp, label %for.body, label %cleanup.loopexit, !llvm.loop !0
+
+for.body: ; preds = %for.body.preheader, %for.cond
+ %i.010 = phi i32 [ %inc, %for.cond ], [ 0, %for.body.preheader ]
+ %cmp3 = icmp sgt i32 %i.010, 3
+ %inc = add nsw i32 %i.010, 1
+ br i1 %cmp3, label %cleanup.loopexit, label %for.cond
+
+cleanup.loopexit: ; preds = %for.body, %for.cond
+ br label %cleanup
+
+cleanup: ; preds = %cleanup.loopexit, %entry
+ ret void
+}
!0 = distinct !{!0, !1}
!1 = !{!"llvm.loop.distribute.enable", i1 true}
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