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llvm-mirror/test/Transforms/LoopStrengthReduce/pr12018.ll
Rafael Espindola 5154b9bedb Don't skip debug instructions when looking for the insertion point of
the cast. If we do, we can end up with

   inst1
   ---------------  < Insertion point
   dbg inst
   new inst

instead of the desired

   inst1
   new inst
   ---------------  < Insertion point
   dbg inst

Another option would be for InsertNoopCastOfTo (or its callers) to move the
insertion point and we would end up with

   inst1
   dbg inst
   new inst
   ---------------  < Insertion point

but that complicates the callers. This fixes PR12018 (and firefox's build).

llvm-svn: 150884
2012-02-18 17:22:58 +00:00

39 lines
1.7 KiB
LLVM

; RUN: opt < %s -loop-reduce
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128"
%struct.nsTArray = type { i8 }
%struct.nsTArrayHeader = type { i32 }
define void @_Z6foobarR8nsTArray(%struct.nsTArray* %aValues, i32 %foo, %struct.nsTArrayHeader* %bar) nounwind {
entry:
br label %for.body
for.body: ; preds = %_ZN8nsTArray9ElementAtEi.exit, %entry
%i.06 = phi i32 [ %add, %_ZN8nsTArray9ElementAtEi.exit ], [ 0, %entry ]
%call.i = call %struct.nsTArrayHeader* @_ZN8nsTArray4Hdr2Ev() nounwind
%add.ptr.i = getelementptr inbounds %struct.nsTArrayHeader* %call.i, i32 1
%tmp = bitcast %struct.nsTArrayHeader* %add.ptr.i to %struct.nsTArray*
%arrayidx = getelementptr inbounds %struct.nsTArray* %tmp, i32 %i.06
%add = add nsw i32 %i.06, 1
call void @llvm.dbg.value(metadata !{%struct.nsTArray* %aValues}, i64 0, metadata !0) nounwind
br label %_ZN8nsTArray9ElementAtEi.exit
_ZN8nsTArray9ElementAtEi.exit: ; preds = %for.body
%arrayidx.i = getelementptr inbounds %struct.nsTArray* %tmp, i32 %add
call void @_ZN11nsTArray15ComputeDistanceERKS_Rd(%struct.nsTArray* %arrayidx, %struct.nsTArray* %arrayidx.i) nounwind
%cmp = icmp slt i32 %add, %foo
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %_ZN8nsTArray9ElementAtEi.exit
ret void
}
declare void @_ZN11nsTArray15ComputeDistanceERKS_Rd(%struct.nsTArray*, %struct.nsTArray*)
declare %struct.nsTArrayHeader* @_ZN8nsTArray4Hdr2Ev()
declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
!0 = metadata !{i32 786689} ; [ DW_TAG_arg_variable ]