Try to eliminate the use of the 'unwind' instruction.

llvm-svn: 139046

llvm/test/CodeGen/Generic/2007-12-17-InvokeAsm.ll

@@ -11,7 +11,7 @@ entry:
 cleanup144:		; preds = %entry
   %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
             cleanup
-  unwind
+  resume { i8*, i32 } %exn
 }
 
 declare i32 @__gxx_personality_v0(...)

llvm/test/Transforms/ADCE/2004-05-04-UnreachableBlock.ll

@@ -11,6 +11,6 @@ invoke_catch.0:         ; No predecessors!
         br i1 false, label %UnifiedUnwindBlock, label %UnifiedReturnBlock
 
 UnifiedUnwindBlock:             ; preds = %invoke_catch.0
-        unwind
+        unreachable
 }
 

llvm/test/Transforms/ADCE/2005-02-17-PHI-Invoke-Crash.ll

@@ -21,7 +21,7 @@ invoke_catch.0:         ; preds = %entry
                         to label %tmp.1.i.i183.noexc unwind label %terminate
 
 tmp.1.i.i183.noexc:             ; preds = %invoke_catch.0
-        unwind
+        ret void
 
 then.0:         ; preds = %tmp.3.i.noexc
         invoke void @_ZN10QByteArray6resizeEi( )

llvm/test/Transforms/Inline/2007-12-19-InlineNoUnwind.ll

@@ -10,7 +10,7 @@ entry:
 r:
 	ret i32 0
 u:
-	unwind
+	unreachable
 }
 
 define i32 @caller() {

llvm/test/Transforms/LCSSA/invoke-dest.ll

@@ -110,12 +110,18 @@ bb106:		; preds = %invcont105, %bb61
 			to label %.noexc unwind label %lpad119		; <i8*> [#uses=1]
 
 lpad:		; preds = %_ZN7cObjectnwEj.exit
+        %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
+                 cleanup
 	br label %Unwind
 
 lpad119:		; preds = %bb106, %invcont104, %invcont103, %bb102, %bb49, %bb34, %bb12, %invcont10, %invcont9, %bb8
+        %exn119 = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
+                 cleanup
 	unreachable
 
 lpad123:		; preds = %.noexc
+        %exn123 = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
+                 cleanup
 	%tmp5 = icmp eq i8* %tmp4, null		; <i1> [#uses=1]
 	br i1 %tmp5, label %Unwind, label %bb.i2
 
@@ -126,6 +132,8 @@ Unwind:		; preds = %bb.i2, %lpad123, %lpad
 	unreachable
 }
 
+declare i32 @__gxx_personality_v0(...)
+
 declare void @_ZN8EtherBus8tokenizeEPKcRSt6vectorIdSaIdEE(i8* nocapture, i8*, i8*)
 
 declare i8* @_Znaj(i32)

llvm/test/Transforms/SimplifyCFG/2006-10-29-InvokeCrash.ll

@@ -461,7 +461,7 @@ cleanup329:		; preds = %cond_true319, %cond_true302, %cond_next293, %cond_true27
         %val = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
                  cleanup
 	call void @_ZN8QPainterD1Ev( %struct.QPainter* %p )
-	unwind
+	resume { i8*, i32 } %val
 }
 
 declare void @_ZN6QSizeFC1Edd(%struct.QPointF*, double, double)

llvm/test/Transforms/SimplifyCFG/2009-01-19-UnconditionalTrappingConstantExpr.ll

@@ -15,7 +15,7 @@ bb2:
 	ret i32 42
 
 bb6:
-	unwind
+	ret i32 927
 }
 
 define i32 @test2(i32 %tmp21, i32 %tmp24, i1 %tmp34) {
@@ -26,6 +26,6 @@ bb5:		; preds = %bb4
 bb6:
 	ret i32 42
 bb7:
-	unwind
+	ret i32 927
 }
 

llvm/test/Transforms/SimplifyCFG/2009-06-15-InvokeCrash.ll

@@ -463,7 +463,7 @@ cleanup329:		; preds = %cond_true319, %cond_true302, %cond_next293, %cond_true27
         %val329 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
                     cleanup
 	call void @_ZN8QPainterD1Ev( %struct.QPainter* %p )
-	unwind
+	resume { i8*, i32 } %val329
 }
 
 declare void @_ZN6QSizeFC1Edd(%struct.QPointF*, double, double)

llvm/test/Transforms/SimplifyCFG/2010-03-30-InvokeCrash.ll

@@ -14,5 +14,9 @@ r:                                                ; preds = %entry
  ret void
 
 u:                                                ; preds = %entry
- unwind
+ %val = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
+          cleanup
+ resume { i8*, i32 } %val
 }
+
+declare i32 @__gxx_personality_v0(...)

llvm/test/Transforms/SimplifyCFG/BrUnwind.ll

@@ -10,6 +10,6 @@ B:              ; preds = %0
         call void @test( i1 %C )
         br label %X
 X:              ; preds = %B, %A
-        unwind
+        ret void
 }
 

llvm/test/Transforms/TailCallElim/dont_reorder_load.ll

@@ -16,7 +16,7 @@ entry:
 	br i1 %tmp2, label %if, label %else
 
 if:		; preds = %entry
-	unwind
+	ret i32 37
 
 else:		; preds = %entry
 	%tmp7 = add i32 %start_arg, 1		; <i32> [#uses=1]