Chris Lattner 3285a6f426 Fix a bug in my checkin from last night that caused miscompilations of ... 186.crafty, fhourstones and 132.ijpeg. Bugpoint makes really nasty miscompilations embarassingly easy to find. It narrowed it down to the instcombiner and this testcase (from fhourstones): bool %l7153_l4706_htstat_loopentry_2E_4_no_exit_2E_4(int* %i, [32 x int]* %works, int* %tmp.98.out) { newFuncRoot: %tmp.96 = load int* %i ; <int> [#uses=1] %tmp.97 = getelementptr [32 x int]* %works, long 0, int %tmp.96 ; <int*> [#uses=1] %tmp.98 = load int* %tmp.97 ; <int> [#uses=2] %tmp.99 = load int* %i ; <int> [#uses=1] %tmp.100 = and int %tmp.99, 7 ; <int> [#uses=1] %tmp.101 = seteq int %tmp.100, 7 ; <bool> [#uses=2] %tmp.102 = cast bool %tmp.101 to int ; <int> [#uses=0] br bool %tmp.101, label %codeRepl4.exitStub, label %codeRepl3.exitStub codeRepl4.exitStub: ; preds = %newFuncRoot store int %tmp.98, int* %tmp.98.out ret bool true codeRepl3.exitStub: ; preds = %newFuncRoot store int %tmp.98, int* %tmp.98.out ret bool false } ... which only has one combination performed on it: $ llvm-as < t.ll | opt -instcombine -debug | llvm-dis IC: Old = %tmp.101 = seteq int %tmp.100, 7 ; <bool> [#uses=1] New = setne int %tmp.100, 0 ; <bool>:<badref> [#uses=0] IC: MOD = br bool %tmp.101, label %codeRepl3.exitStub, label %codeRepl4.exitStub IC: MOD = %tmp.97 = getelementptr [32 x int]* %works, uint 0, int %tmp.96 ; <int*> [#uses=1] It doesn't get much better than this. :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14109 91177308-0d34-0410-b5e6-96231b3b80d8		2004-06-10 02:33:20 +00:00
..
ADCE.cpp
BasicBlockPlacement.cpp
ConstantProp.cpp
CorrelatedExprs.cpp
DCE.cpp
DecomposeMultiDimRefs.cpp
GCSE.cpp
IndVarSimplify.cpp
InstructionCombining.cpp	Fix a bug in my checkin from last night that caused miscompilations of	2004-06-10 02:33:20 +00:00
LICM.cpp	Adjust to the changes in the AliasSetTracker interface	2004-05-23 21:20:19 +00:00
LoopUnroll.cpp
LoopUnswitch.cpp
LowerGC.cpp	Spelling people's names right is kinda important	2004-05-23 21:27:29 +00:00
Makefile
PiNodeInsertion.cpp
PRE.cpp
Reassociate.cpp
ScalarReplAggregates.cpp
SCCP.cpp
SimplifyCFG.cpp
SymbolStripping.cpp	Make this pass simply invoke SymbolTable::strip().	2004-05-25 08:51:25 +00:00
TailDuplication.cpp	Remove unused header file.	2004-05-25 08:51:36 +00:00
TailRecursionElimination.cpp