[llvm-commits] [llvm] r57025 - in /llvm/trunk: lib/Transforms/Utils/SimplifyCFG.cpp test/Transforms/SimplifyCFG/2008-10-03-SpeculativelyExecuteBeforePHI.ll

[Nick Lewycky]

Thanks Devang!

Devang Patel wrote:
> Author: dpatel
> Date: Fri Oct  3 13:57:37 2008
> New Revision: 57025
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=57025&view=rev
> Log:
> Nick Lewycky's patch.
> While hosting instruction check PHI node.
> 
> 
> Added:
>     llvm/trunk/test/Transforms/SimplifyCFG/2008-10-03-SpeculativelyExecuteBeforePHI.ll
> Modified:
>     llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp
> 
> Modified: llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp?rev=57025&r1=57024&r2=57025&view=diff
> 
> ==============================================================================
> --- llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp (original)
> +++ llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp Fri Oct  3 13:57:37 2008
> @@ -1051,7 +1051,7 @@
>    BasicBlock::iterator InsertPos = BI;
>    if (InsertPos != BIParent->begin()) 
>      --InsertPos;
> -  if (InsertPos == BrCond) {
> +  if (InsertPos == BrCond && !isa<PHINode>(BrCond)) {
>      SmallPtrSet<Instruction *, 4> BB1Insns;
>      for(BasicBlock::iterator BB1I = BB1->begin(), BB1E = BB1->end(); 
>          BB1I != BB1E; ++BB1I) 
> 
> Added: llvm/trunk/test/Transforms/SimplifyCFG/2008-10-03-SpeculativelyExecuteBeforePHI.ll
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/SimplifyCFG/2008-10-03-SpeculativelyExecuteBeforePHI.ll?rev=57025&view=auto
> 
> ==============================================================================
> --- llvm/trunk/test/Transforms/SimplifyCFG/2008-10-03-SpeculativelyExecuteBeforePHI.ll (added)
> +++ llvm/trunk/test/Transforms/SimplifyCFG/2008-10-03-SpeculativelyExecuteBeforePHI.ll Fri Oct  3 13:57:37 2008
> @@ -0,0 +1,36 @@
> +; RUN: llvm-as < %s | opt -simplifycfg
> +; PR2855
> +
> +define i32 @_Z1fPii(i32* %b, i32 %f) nounwind {
> +entry:
> +	br label %bb
> +
> +bb:		; preds = %bb9, %bb7, %bb, %entry
> +	%__c2.2 = phi i32 [ undef, %entry ], [ %__c2.1, %bb7 ], [ %__c2.1, %bb9 ]		; <i32> [#uses=2]
> +	%s.0 = phi i32 [ 0, %entry ], [ 0, %bb7 ], [ %2, %bb9 ]		; <i32> [#uses=1]
> +	br label %bb1
> +
> +bb1:		; preds = %bb
> +	%0 = icmp slt i32 0, %f		; <i1> [#uses=1]
> +	br i1 %0, label %bb3, label %bb6
> +
> +bb3:		; preds = %bb1
> +	%1 = icmp eq i32 0, 0		; <i1> [#uses=1]
> +	br i1 %1, label %bb6, label %bb5
> +
> +bb5:		; preds = %bb3
> +	br label %bb7
> +
> +bb6:		; preds = %bb3, %bb1
> +	%__c2.0 = phi i32 [ 0, %bb3 ], [ %__c2.2, %bb1 ]		; <i32> [#uses=1]
> +	br label %bb7
> +
> +bb7:		; preds = %bb6, %bb5
> +	%__c2.1 = phi i32 [ 0, %bb5 ], [ %__c2.0, %bb6 ]		; <i32> [#uses=2]
> +	%iftmp.1.0 = phi i1 [ false, %bb5 ], [ true, %bb6 ]		; <i1> [#uses=1]
> +	br i1 %iftmp.1.0, label %bb, label %bb9
> +
> +bb9:		; preds = %bb7
> +	%2 = add i32 %s.0, 2		; <i32> [#uses=1]
> +	br label %bb
> +}
> 
> 
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