safe for later allocation.  This fixes McCat/18-imp with llc-beta.

llvm-svn: 30204

llvm-svn: 30198

of unallocatable registers, just because an alias is allocatable.  We were
picking registers like SIL just because ESI was being used.

llvm-svn: 30197

llvm-svn: 30191

llvm-svn: 30190

llvm-svn: 30189

llvm-svn: 30188

fix select.ll

llvm-svn: 30186

llvm-svn: 30178

llvm-svn: 30177

llvm-svn: 30173

  shuffle V1, <undef>, <undef, undef, 4, 5>
- Fix some suspicious logic into LowerVectorShuffle that cause less than
  optimal code by failing to identify MOVL (move to lowest element of a
  vector).

llvm-svn: 30171

2. Protect and outline createTargetAsmInfo.

3. Misc. kruft.

llvm-svn: 30169

llvm-svn: 30168

reduce amount of stack space used at runtime.

llvm-svn: 30167

llvm-svn: 30165

host, it should be affected by the target.  Allow the command line option to
override in either case.

llvm-svn: 30164

llvm-svn: 30162

llvm-svn: 30161

For Transforms/TailDup/if-tail-dup.ll, f.e., it produces:

_foo:
        movl 8(%esp), %eax
        movl 4(%esp), %ecx
        testl $1, %ecx
        je LBB1_2       #cond_next
LBB1_1: #cond_true
        movl $1, (%eax)
LBB1_2: #cond_next
        testl $2, %ecx
        je LBB1_4       #cond_next10
LBB1_3: #cond_true6
        movl $1, 4(%eax)
LBB1_4: #cond_next10
        testl $4, %ecx
        je LBB1_6       #cond_next18
LBB1_5: #cond_true14
        movl $1, 8(%eax)
LBB1_6: #cond_next18
        testl $8, %ecx
        je LBB1_8       #return
LBB1_7: #cond_true22
        movl $1, 12(%eax)
        ret
LBB1_8: #return
        ret

instead of:

_foo:
        movl 4(%esp), %eax
        testl $2, %eax
        sete %cl
        movl 8(%esp), %edx
        testl $1, %eax
        je LBB1_2       #cond_next
LBB1_1: #cond_true
        movl $1, (%edx)
        testb %cl, %cl
        jne LBB1_4      #cond_next10
        jmp LBB1_3      #cond_true6
LBB1_2: #cond_next
        testb %cl, %cl
        jne LBB1_4      #cond_next10
LBB1_3: #cond_true6
        movl $1, 4(%edx)
        testl $4, %eax
        je LBB1_6       #cond_next18
        jmp LBB1_5      #cond_true14
LBB1_4: #cond_next10
        testl $4, %eax
        je LBB1_6       #cond_next18
LBB1_5: #cond_true14
        movl $1, 8(%edx)
        testl $8, %eax
        je LBB1_8       #return
        jmp LBB1_7      #cond_true22
LBB1_6: #cond_next18
        testl $8, %eax
        je LBB1_8       #return
LBB1_7: #cond_true22
        movl $1, 12(%edx)
        ret
LBB1_8: #return
        ret

llvm-svn: 30158

using test, which provides nice simplifications like:

-       movl %edi, %ecx
-       andl $2, %ecx
-       cmpl $0, %ecx
+       testl $2, %edi
        je LBB1_11      #cond_next90

There are a couple of dagiselemitter deficiencies that this exposes, they will
be handled later.

llvm-svn: 30156

llvm-svn: 30155

llvm-svn: 30152

llvm-svn: 30151

llvm-svn: 30149

llvm-svn: 30146

too many phi operands when lowering a switch to branches in some cases.

llvm-svn: 30142

llvm-svn: 30140

llvm-svn: 30135

llvm-svn: 30134

llvm-svn: 30131

llvm-svn: 30127

llvm-svn: 30126

llvm-svn: 30125

llvm-svn: 30122

llvm-svn: 30121

llvm-svn: 30118

llvm-svn: 30117

lowerinvoke regtests.

llvm-svn: 30115

llvm-svn: 30114