Test Case for r220872:Do not simplifyLatch for loops where hoisting increments couldr...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220873 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopRotate/nosimplifylatch.ll b/test/Transforms/LoopRotate/nosimplifylatch.ll
new file mode 100644 (file)
index 0000000..b361dfb
--- /dev/null
+++ b/test/Transforms/LoopRotate/nosimplifylatch.ll
@@ -0,0 +1,70 @@
+; RUN: opt -S < %s -loop-rotate -licm -verify-dom-info -verify-loop-info | FileCheck %s
+target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+target triple = "arm64-apple-ios8.0.0"
+
+;CHECK: for.inc:
+;CHECK-NEXT: %incdec.ptr.i = getelementptr 
+
+; Function Attrs: alwaysinline inlinehint nounwind readonly ssp
+define linkonce_odr hidden i64 @_ZNSt3__14findINS_11__wrap_iterIPiEEiEET_S4_S4_RKT0_(i64 %__first.coerce, i64 %__last.coerce, i32* nocapture readonly dereferenceable(4) %__value_) {
+entry:
+  %coerce.val.ip = inttoptr i64 %__first.coerce to i32*
+  %coerce.val.ip2 = inttoptr i64 %__last.coerce to i32*
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.inc, %entry
+  %coerce.val.ip9 = phi i32* [ %incdec.ptr.i, %for.inc ], [ %coerce.val.ip, %entry ]
+  %lnot.i = icmp eq i32* %coerce.val.ip9, %coerce.val.ip2
+  br i1 %lnot.i, label %for.end, label %for.body
+
+for.body:                                         ; preds = %for.cond
+  %0 = load i32* %coerce.val.ip9, align 4
+  %1 = load i32* %__value_, align 4
+  %cmp = icmp eq i32 %0, %1
+  br i1 %cmp, label %for.end, label %for.inc
+
+for.inc:                                          ; preds = %for.body
+  %incdec.ptr.i = getelementptr inbounds i32* %coerce.val.ip9, i64 1
+  br label %for.cond
+
+for.end:                                          ; preds = %for.cond, %for.body
+  %coerce.val.ip9.lcssa = phi i32* [ %coerce.val.ip9, %for.cond ], [ %coerce.val.ip9, %for.body ]
+  %coerce.val.pi = ptrtoint i32* %coerce.val.ip9.lcssa to i64
+  ret i64 %coerce.val.pi
+}
+
+; RUN: opt -S < %s -loop-rotate -licm -verify-dom-info -verify-loop-info | FileCheck %s
+target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+target triple = "arm64-apple-ios8.0.0"
+
+;CHECK: for.inc:
+;CHECK-NEXT: %incdec.ptr.i = getelementptr 
+
+; Function Attrs: alwaysinline inlinehint nounwind readonly ssp
+define linkonce_odr hidden i64 @_ZNSt3__14findINS_11__wrap_iterIPiEEiEET_S4_S4_RKT0_(i64 %__first.coerce, i64 %__last.coerce, i32* nocapture readonly dereferenceable(4) %__value_) {
+entry:
+  %coerce.val.ip = inttoptr i64 %__first.coerce to i32*
+  %coerce.val.ip2 = inttoptr i64 %__last.coerce to i32*
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.inc, %entry
+  %coerce.val.ip9 = phi i32* [ %incdec.ptr.i, %for.inc ], [ %coerce.val.ip, %entry ]
+  %lnot.i = icmp eq i32* %coerce.val.ip9, %coerce.val.ip2
+  br i1 %lnot.i, label %for.end, label %for.body
+
+for.body:                                         ; preds = %for.cond
+  %0 = load i32* %coerce.val.ip9, align 4
+  %1 = load i32* %__value_, align 4
+  %cmp = icmp eq i32 %0, %1
+  br i1 %cmp, label %for.end, label %for.inc
+
+for.inc:                                          ; preds = %for.body
+  %incdec.ptr.i = getelementptr inbounds i32* %coerce.val.ip9, i64 1
+  br label %for.cond
+
+for.end:                                          ; preds = %for.cond, %for.body
+  %coerce.val.ip9.lcssa = phi i32* [ %coerce.val.ip9, %for.cond ], [ %coerce.val.ip9, %for.body ]
+  %coerce.val.pi = ptrtoint i32* %coerce.val.ip9.lcssa to i64
+  ret i64 %coerce.val.pi
+}
+