[llvm-branch-commits] [llvm-branch] r108474 - in /llvm/branches/Apple/Morbo: ./ lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h lib/Target/ARM/ARMInstrFormats.td test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll test/CodeGen/X86/2008-01-25-EmptyFunction.ll

Bill Wendling isanbard at gmail.com
Thu Jul 15 16:36:01 PDT 2010 

Author: void
Date: Thu Jul 15 18:36:01 2010
New Revision: 108474

URL: http://llvm.org/viewvc/llvm-project?rev=108474&view=rev
Log:
$ svn merge -c 108473 https://llvm.org/svn/llvm-project/llvm/trunk
--- Merging r108473 into '.':
U    test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll
U    test/CodeGen/X86/2008-01-25-EmptyFunction.ll
U    lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
U    lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h


Modified:
    llvm/branches/Apple/Morbo/   (props changed)
    llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
    llvm/branches/Apple/Morbo/lib/Target/ARM/ARMInstrFormats.td   (props changed)
    llvm/branches/Apple/Morbo/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll
    llvm/branches/Apple/Morbo/test/CodeGen/X86/2008-01-25-EmptyFunction.ll

Propchange: llvm/branches/Apple/Morbo/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Jul 15 18:36:01 2010
@@ -1,3 +1,3 @@
 /llvm/branches/Apple/Hermes:96832,96835,96858,96870,96876,96879,104427,104930,104971
-/llvm/trunk:98602,98604,98612,98615-98616,98675,98686,98743-98744,98768,98773,98778,98780,98810,98835,98839,98845,98855,98862,98881,98920,98977,98980,99032-99033,99043,99196,99223,99263,99282-99284,99306,99319-99321,99324,99336,99378,99418,99423,99429,99440,99455,99463,99465,99469,99484,99490,99492-99494,99507,99524,99537,99539-99540,99544,99570,99575,99598,99620,99629-99630,99636,99671,99692,99695,99697,99699,99722,99816,99835-99836,99845-99846,99848,99850,99855,99879,99881-99883,99895,99899,99910,99916,99919,99952-99954,99957,99959,99974-99975,99982,99984-99986,99988-99989,99992-99993,99995,99997-99999,100016,100035,100037-100038,100042,100044,100056,100072,100074,100078,100081-100090,100092,100094-100095,100116,100134,100184,100209,100214-100218,100220-100221,100223-100225,100231,100250,100252,100257,100261,100304,100332,100353,100384,100454-100455,100457,100466,100478,100480,100487,100494,100497,100505,100521,100553,100568,100584,100592,100609-100610,100636,100710,100736
 ,100742,100751,100768-100769,100771,100781,100797,100804,100837,100867,100892,100936-100937,101011,101023,101075,101077,101079,101081,101085,101154,101158,101162,101165,101181,101190,101202,101282,101294,101303,101314-101315,101317,101331,101343,101383,101392,101420,101453,101604,101615,101629,101684-101686,101805,101845,101847,101851,101855,101870,101879,101897,101925,101930,101965,101971,101979,102111,102120,102192,102202,102225,102236-102237,102358,102366,102394,102396,102405,102421,102454-102456,102463,102467-102468,102470,102481,102486-102488,102492-102493,102504-102505,102508-102510,102513,102519,102524,102526,102531,102558,102646,102653,102655,102661-102662,102672,102743,102760,102770,102791,102948,102970,102980,103001,103126,103133,103233,103314,103356,103415,103419,103439,103451,103455,103459,103757,103798,103801-103802,103804,103808,103813,103824,103829,103928,103990,103995,104066,104182,104233,104236,104265,104274,104302,104338,104412,104419,104524,104531,104640,1
 04646,104649,104655-104656,104661,104664,104705-104706,104720,104722,104732,104737,104740,104785,104848,104858,104872,104884,104900,104967,105285,105292,105295,105360,105387,105490,105505,105741,105828-105829,105872,105948-105949,106005,106066,106075,106088,106243-106244,106270,106438-106439,106515-106516,106518,106569,106576,106582,106604,106611-106612,106772,106792,106862,106878,106895,106985,106989-106990,107025,107027,107059,107065,107085,107103,107112,107212,107228,107237,107430,107433,107440,107509,107907,107922
+/llvm/trunk:98602,98604,98612,98615-98616,98675,98686,98743-98744,98768,98773,98778,98780,98810,98835,98839,98845,98855,98862,98881,98920,98977,98980,99032-99033,99043,99196,99223,99263,99282-99284,99306,99319-99321,99324,99336,99378,99418,99423,99429,99440,99455,99463,99465,99469,99484,99490,99492-99494,99507,99524,99537,99539-99540,99544,99570,99575,99598,99620,99629-99630,99636,99671,99692,99695,99697,99699,99722,99816,99835-99836,99845-99846,99848,99850,99855,99879,99881-99883,99895,99899,99910,99916,99919,99952-99954,99957,99959,99974-99975,99982,99984-99986,99988-99989,99992-99993,99995,99997-99999,100016,100035,100037-100038,100042,100044,100056,100072,100074,100078,100081-100090,100092,100094-100095,100116,100134,100184,100209,100214-100218,100220-100221,100223-100225,100231,100250,100252,100257,100261,100304,100332,100353,100384,100454-100455,100457,100466,100478,100480,100487,100494,100497,100505,100521,100553,100568,100584,100592,100609-100610,100636,100710,100736
 ,100742,100751,100768-100769,100771,100781,100797,100804,100837,100867,100892,100936-100937,101011,101023,101075,101077,101079,101081,101085,101154,101158,101162,101165,101181,101190,101202,101282,101294,101303,101314-101315,101317,101331,101343,101383,101392,101420,101453,101604,101615,101629,101684-101686,101805,101845,101847,101851,101855,101870,101879,101897,101925,101930,101965,101971,101979,102111,102120,102192,102202,102225,102236-102237,102358,102366,102394,102396,102405,102421,102454-102456,102463,102467-102468,102470,102481,102486-102488,102492-102493,102504-102505,102508-102510,102513,102519,102524,102526,102531,102558,102646,102653,102655,102661-102662,102672,102743,102760,102770,102791,102948,102970,102980,103001,103126,103133,103233,103314,103356,103415,103419,103439,103451,103455,103459,103757,103798,103801-103802,103804,103808,103813,103824,103829,103928,103990,103995,104066,104182,104233,104236,104265,104274,104302,104338,104412,104419,104524,104531,104640,1
 04646,104649,104655-104656,104661,104664,104705-104706,104720,104722,104732,104737,104740,104785,104848,104858,104872,104884,104900,104967,105285,105292,105295,105360,105387,105490,105505,105741,105828-105829,105872,105948-105949,106005,106066,106075,106088,106243-106244,106270,106438-106439,106515-106516,106518,106569,106576,106582,106604,106611-106612,106772,106792,106862,106878,106895,106985,106989-106990,107025,107027,107059,107065,107085,107103,107112,107212,107228,107237,107430,107433,107440,107506,107509,107907,107922,108473
 /llvm-gcc-4.2/trunk:104182

Modified: llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp?rev=108474&r1=108473&r2=108474&view=diff
==============================================================================
--- llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp (original)
+++ llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp Thu Jul 15 18:36:01 2010
@@ -627,6 +627,7 @@
 #define HANDLE_INST(NUM, OPCODE, CLASS) \
     case Instruction::OPCODE: visit##OPCODE((CLASS&)I); break;
 #include "llvm/Instruction.def"
+#undef HANDLE_INST
   }
 
   // Assign the ordering to the freshly created DAG nodes.
@@ -2075,6 +2076,19 @@
                           getValue(I.getAddress())));
 }
 
+void SelectionDAGBuilder::visitUnreachable(UnreachableInst &I) {
+  // If the function consists of a single "unreachable" instruction, emit a
+  // "trap". This prevents the back-ends from generating empty functions or
+  // functions which have a prologue, but no epilogue.
+  const BasicBlock *BB = I.getParent();
+  const Function *F = BB->getParent();
+
+  if (F->size() == 1 && BB->size() == 1 &&
+      isa<UnreachableInst>(BB->getTerminator()))
+      DAG.setRoot(DAG.getNode(ISD::TRAP, getCurDebugLoc(),
+                              MVT::Other, getRoot()));
+}
+
 void SelectionDAGBuilder::visitFSub(User &I) {
   // -0.0 - X --> fneg
   const Type *Ty = I.getType();

Modified: llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h?rev=108474&r1=108473&r2=108474&view=diff
==============================================================================
--- llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h (original)
+++ llvm/branches/Apple/Morbo/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h Thu Jul 15 18:36:01 2010
@@ -394,7 +394,7 @@
   void visitBr(BranchInst &I);
   void visitSwitch(SwitchInst &I);
   void visitIndirectBr(IndirectBrInst &I);
-  void visitUnreachable(UnreachableInst &I) { /* noop */ }
+  void visitUnreachable(UnreachableInst &I);
 
   // Helpers for visitSwitch
   bool handleSmallSwitchRange(CaseRec& CR,

Propchange: llvm/branches/Apple/Morbo/lib/Target/ARM/ARMInstrFormats.td
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Jul 15 18:36:01 2010
@@ -1,2 +1,2 @@
 /llvm/branches/Apple/Hermes/lib/Target/ARM/ARMInstrFormats.td:104930
-/llvm/trunk/lib/Target/ARM/ARMInstrFormats.td:98980,103126,103757,103928,104182,104233,104236,104265,104274,104302,104338,104412,104419,104524,104531,104640,104646,104649,104655-104656,104661,104664,104705-104706,104720,104722,104732,104737,104740,104785,104848,104858,104872,104884,104900,105092,105285,105292,105295,105360,105387,105490,105505,105741,105828-105829,105872,106066,106075,106088,106243-106244,106270,106438-106439,106515-106516,106518,106576,106582,106604,106611-106612,106772,106792,106862,106878,106895,106985,106989-106990,107025,107027,107059,107065,107085,107103,107112,107212,107228,107237,107430,107433,107440,107509,107907,107922
+/llvm/trunk/lib/Target/ARM/ARMInstrFormats.td:98980,103126,103757,103928,104182,104233,104236,104265,104274,104302,104338,104412,104419,104524,104531,104640,104646,104649,104655-104656,104661,104664,104705-104706,104720,104722,104732,104737,104740,104785,104848,104858,104872,104884,104900,105092,105285,105292,105295,105360,105387,105490,105505,105741,105828-105829,105872,106066,106075,106088,106243-106244,106270,106438-106439,106515-106516,106518,106576,106582,106604,106611-106612,106772,106792,106862,106878,106895,106985,106989-106990,107025,107027,107059,107065,107085,107103,107112,107212,107228,107237,107430,107433,107440,107509,107907,107922,108473

Modified: llvm/branches/Apple/Morbo/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Morbo/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll?rev=108474&r1=108473&r2=108474&view=diff
==============================================================================
--- llvm/branches/Apple/Morbo/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll (original)
+++ llvm/branches/Apple/Morbo/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll Thu Jul 15 18:36:01 2010
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=ppc32 | grep .byte
+; RUN: llc < %s -march=ppc32 | grep trap
 target triple = "powerpc-apple-darwin8"
 
 

Modified: llvm/branches/Apple/Morbo/test/CodeGen/X86/2008-01-25-EmptyFunction.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Morbo/test/CodeGen/X86/2008-01-25-EmptyFunction.ll?rev=108474&r1=108473&r2=108474&view=diff
==============================================================================
--- llvm/branches/Apple/Morbo/test/CodeGen/X86/2008-01-25-EmptyFunction.ll (original)
+++ llvm/branches/Apple/Morbo/test/CodeGen/X86/2008-01-25-EmptyFunction.ll Thu Jul 15 18:36:01 2010
@@ -1,8 +1,17 @@
-; RUN: llc < %s -march=x86 | grep {.byte	0}
+; RUN: llc < %s -march=x86 | FileCheck -check-prefix=NO-FP %s
+; RUN: llc < %s -march=x86 -disable-fp-elim | FileCheck -check-prefix=FP %s
 target triple = "i686-apple-darwin8"
 
+define void @func1() noreturn nounwind  {
+entry:
+; NO-FP: ud2
+        unreachable
+}
 
-define void @bork() noreturn nounwind  {
+define void @func2() noreturn nounwind  {
 entry:
+; FP: pushl %ebp
+; FP: movl %esp, %ebp
+; FP: ud2
         unreachable
 }

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