[X86] Add more tests for D111858. NFC

Add tests with sub instead of neg.

Author: topperc

llvm/test/CodeGen/X86/neg-abs.ll

@@ -154,3 +154,170 @@ define i128 @neg_abs_i128(i128 %x) nounwind {
   %neg = sub nsw i128 0, %abs
   ret i128 %neg
 }
+
+define i8 @sub_abs_i8(i8 %x, i8 %y) nounwind {
+; X86-LABEL: sub_abs_i8:
+; X86:       # %bb.0:
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %al
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %cl
+; X86-NEXT:    movl %ecx, %edx
+; X86-NEXT:    sarb $7, %dl
+; X86-NEXT:    addb %dl, %cl
+; X86-NEXT:    xorb %dl, %cl
+; X86-NEXT:    subb %cl, %al
+; X86-NEXT:    retl
+;
+; X64-LABEL: sub_abs_i8:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %esi, %eax
+; X64-NEXT:    movl %edi, %ecx
+; X64-NEXT:    sarb $7, %cl
+; X64-NEXT:    addb %cl, %dil
+; X64-NEXT:    xorb %cl, %dil
+; X64-NEXT:    subb %dil, %al
+; X64-NEXT:    # kill: def $al killed $al killed $eax
+; X64-NEXT:    retq
+  %abs = tail call i8 @llvm.abs.i8(i8 %x, i1 false)
+  %neg = sub nsw i8 %y, %abs
+  ret i8 %neg
+}
+
+define i16 @sub_abs_i16(i16 %x, i16 %y) nounwind {
+; X86-LABEL: sub_abs_i16:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movswl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl %ecx, %edx
+; X86-NEXT:    sarl $15, %edx
+; X86-NEXT:    addl %edx, %ecx
+; X86-NEXT:    xorl %edx, %ecx
+; X86-NEXT:    subl %ecx, %eax
+; X86-NEXT:    # kill: def $ax killed $ax killed $eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: sub_abs_i16:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %esi, %eax
+; X64-NEXT:    movl %edi, %ecx
+; X64-NEXT:    negw %cx
+; X64-NEXT:    cmovsw %di, %cx
+; X64-NEXT:    subl %ecx, %eax
+; X64-NEXT:    # kill: def $ax killed $ax killed $eax
+; X64-NEXT:    retq
+  %abs = tail call i16 @llvm.abs.i16(i16 %x, i1 false)
+  %neg = sub i16 %y, %abs
+  ret i16 %neg
+}
+
+define i32 @sub_abs_i32(i32 %x, i32 %y) nounwind {
+; X86-LABEL: sub_abs_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl %ecx, %edx
+; X86-NEXT:    sarl $31, %edx
+; X86-NEXT:    addl %edx, %ecx
+; X86-NEXT:    xorl %edx, %ecx
+; X86-NEXT:    subl %ecx, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: sub_abs_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %esi, %eax
+; X64-NEXT:    movl %edi, %ecx
+; X64-NEXT:    negl %ecx
+; X64-NEXT:    cmovsl %edi, %ecx
+; X64-NEXT:    subl %ecx, %eax
+; X64-NEXT:    retq
+  %abs = tail call i32 @llvm.abs.i32(i32 %x, i1 false)
+  %neg = sub i32 %y, %abs
+  ret i32 %neg
+}
+
+define i64 @sub_abs_i64(i64 %x, i64 %y) nounwind {
+; X86-LABEL: sub_abs_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    pushl %edi
+; X86-NEXT:    pushl %esi
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl %ecx, %esi
+; X86-NEXT:    sarl $31, %esi
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edi
+; X86-NEXT:    addl %esi, %edi
+; X86-NEXT:    adcl %esi, %ecx
+; X86-NEXT:    xorl %esi, %ecx
+; X86-NEXT:    xorl %esi, %edi
+; X86-NEXT:    subl %edi, %eax
+; X86-NEXT:    sbbl %ecx, %edx
+; X86-NEXT:    popl %esi
+; X86-NEXT:    popl %edi
+; X86-NEXT:    retl
+;
+; X64-LABEL: sub_abs_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rsi, %rax
+; X64-NEXT:    movq %rdi, %rcx
+; X64-NEXT:    negq %rcx
+; X64-NEXT:    cmovsq %rdi, %rcx
+; X64-NEXT:    subq %rcx, %rax
+; X64-NEXT:    retq
+  %abs = tail call i64 @llvm.abs.i64(i64 %x, i1 false)
+  %neg = sub i64 %y, %abs
+  ret i64 %neg
+}
+
+define i128 @sub_abs_i128(i128 %x, i128 %y) nounwind {
+; X86-LABEL: sub_abs_i128:
+; X86:       # %bb.0:
+; X86-NEXT:    pushl %edi
+; X86-NEXT:    pushl %esi
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl %eax, %ecx
+; X86-NEXT:    sarl $31, %ecx
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
+; X86-NEXT:    addl %ecx, %edx
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
+; X86-NEXT:    adcl %ecx, %esi
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edi
+; X86-NEXT:    adcl %ecx, %edi
+; X86-NEXT:    adcl %ecx, %eax
+; X86-NEXT:    xorl %ecx, %eax
+; X86-NEXT:    xorl %ecx, %edi
+; X86-NEXT:    xorl %ecx, %esi
+; X86-NEXT:    xorl %ecx, %edx
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    subl %edx, %ecx
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
+; X86-NEXT:    sbbl %esi, %edx
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
+; X86-NEXT:    sbbl %edi, %esi
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edi
+; X86-NEXT:    sbbl %eax, %edi
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl %ecx, (%eax)
+; X86-NEXT:    movl %edx, 4(%eax)
+; X86-NEXT:    movl %esi, 8(%eax)
+; X86-NEXT:    movl %edi, 12(%eax)
+; X86-NEXT:    popl %esi
+; X86-NEXT:    popl %edi
+; X86-NEXT:    retl $4
+;
+; X64-LABEL: sub_abs_i128:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdx, %rax
+; X64-NEXT:    movq %rsi, %rdx
+; X64-NEXT:    sarq $63, %rdx
+; X64-NEXT:    addq %rdx, %rdi
+; X64-NEXT:    adcq %rdx, %rsi
+; X64-NEXT:    xorq %rdx, %rsi
+; X64-NEXT:    xorq %rdx, %rdi
+; X64-NEXT:    subq %rdi, %rax
+; X64-NEXT:    sbbq %rsi, %rcx
+; X64-NEXT:    movq %rcx, %rdx
+; X64-NEXT:    retq
+  %abs = tail call i128 @llvm.abs.i128(i128 %x, i1 false)
+  %neg = sub i128 %y, %abs
+  ret i128 %neg
+}