[llvm] r220873 - Test Case for r220872:Do not simplifyLatch for loops where hoisting increments couldresult in extra live range interferance

[Adrian Prantl]

This testcase is failing on our build bots:
http://lab.llvm.org:8080/green/view/Clang%20Stage%201/job/clang-stage1-configure-RA_check/597/consoleFull#-15017152668254eaf0-7326-4999-85b0-388101f2d404

Could you please fix/revert this change?

thanks,
adrian

> On Oct 29, 2014, at 1:20 PM, Yi Jiang <yjiang at apple.com> wrote:
> 
> Author: yjiang
> Date: Wed Oct 29 15:20:33 2014
> New Revision: 220873
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=220873&view=rev
> Log:
> Test Case for r220872:Do not simplifyLatch for loops where hoisting increments couldresult in extra live range interferance
> 
> Added:
>    llvm/trunk/test/Transforms/LoopRotate/nosimplifylatch.ll
> 
> Added: llvm/trunk/test/Transforms/LoopRotate/nosimplifylatch.ll
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LoopRotate/nosimplifylatch.ll?rev=220873&view=auto
> ==============================================================================
> --- llvm/trunk/test/Transforms/LoopRotate/nosimplifylatch.ll (added)
> +++ llvm/trunk/test/Transforms/LoopRotate/nosimplifylatch.ll Wed Oct 29 15:20:33 2014
> @@ -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
> +}
> +
> 
> 
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