Chris Lattner a34b3cf953 X86 supports i8/i16 overflow ops (except i8 multiplies), we should ... generate them. Now we compile: define zeroext i8 @X(i8 signext %a, i8 signext %b) nounwind ssp { entry: %0 = tail call %0 @llvm.sadd.with.overflow.i8(i8 %a, i8 %b) %cmp = extractvalue %0 %0, 1 br i1 %cmp, label %if.then, label %if.end into: _X: ## @X ## BB#0: ## %entry subl $12, %esp movb 16(%esp), %al addb 20(%esp), %al jo LBB0_2 Before we were generating: _X: ## @X ## BB#0: ## %entry pushl %ebp movl %esp, %ebp subl $8, %esp movb 12(%ebp), %al testb %al, %al setge %cl movb 8(%ebp), %dl testb %dl, %dl setge %ah cmpb %cl, %ah sete %cl addb %al, %dl testb %dl, %dl setge %al cmpb %al, %ah setne %al andb %cl, %al testb %al, %al jne LBB0_2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122186 91177308-0d34-0410-b5e6-96231b3b80d8		2010-12-19 20:03:11 +00:00
..
ADCE
ArgumentPromotion
BlockPlacement
BranchFolding
CodeExtractor
CodeGenPrepare	revert r122164, I'm going to go with a different approach.	2010-12-19 04:23:03 +00:00
ConstantMerge
ConstProp	Teach ConstantFoldInstruction() how to fold insertvalue and extractvalue.	2010-11-29 20:36:52 +00:00
CorrelatedValuePropagation	Fix PR8790, another instance where unreachable code can cause instruction simplification to fail,	2010-12-15 00:55:35 +00:00
DeadArgElim
DeadStoreElimination	Fix PR8728, a miscompilation I recently introduced. When optimizing	2010-12-06 01:48:06 +00:00
FunctionAttrs
GlobalDCE
GlobalOpt	reapply r121100 with a tweak to constant fold ConstExprs with TargetData	2010-12-07 04:33:29 +00:00
GVN	Preserve TBAA tags when doing load PRE.	2010-12-15 23:53:55 +00:00
IndVarSimplify
Inline
InstCombine	X86 supports i8/i16 overflow ops (except i8 multiplies), we should	2010-12-19 20:03:11 +00:00
Internalize
IPConstantProp
JumpThreading	Teach jump threading to "look through" a select when the branch direction of a terminator depends on it.	2010-12-15 09:51:20 +00:00
LCSSA
LICM	Enhance LICM to promote alias sets whose pointers themselves are stored,	2010-12-19 05:57:25 +00:00
LoopDeletion
LoopRotate
LoopSimplify
LoopStrengthReduce
LoopUnroll
LoopUnswitch
LowerAtomic
LowerInvoke
LowerSetJmp
LowerSwitch
Mem2Reg
MemCpyOpt	enhance memcpyopt to zap memcpy's that have the same src/dst.	2010-12-09 07:45:45 +00:00
MergeFunc
PartialSpecialize
PruneEH
Reassociate
ScalarRepl	Treat a call of function pointer like a load of the pointer when considering	2010-11-24 22:04:20 +00:00
SCCP
SimplifyCFG	SimplifyCFG: Ranges can be larger than 64 bits. Fixes Release-selfhost build.	2010-12-17 10:48:14 +00:00
SimplifyLibCalls	Revert r64460. strtol and friends cannot be marked readonly, even with	2010-12-17 01:09:43 +00:00
Sink
SRETPromotion
StripSymbols
TailCallElim
TailDup