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[x86] add more tests for bit hacking opportunities with setcc; NFC 

Missed cases where the input and output are the same size in rL335391.

llvm-svn: 335396
This commit is contained in:
Sanjay Patel 2018-06-22 22:07:26 +00:00
parent 0fe8ea568b
commit 80b85a46db
1 changed files with 56 additions and 0 deletions
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56
llvm/test/CodeGen/X86/bool-math.ll
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@ -1,6 +1,21 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
define i32 @sub_zext_cmp_mask_same_size_result(i32 %x) {
; CHECK-LABEL: sub_zext_cmp_mask_same_size_result:
; CHECK: # %bb.0:
; CHECK-NEXT: andl $1, %edi
; CHECK-NEXT: cmpl $1, %edi
; CHECK-NEXT: movl $-27, %eax
; CHECK-NEXT: sbbl $0, %eax
; CHECK-NEXT: retq
%a = and i32 %x, 1
%c = icmp eq i32 %a, 0
%z = zext i1 %c to i32
%r = sub i32 -27, %z
ret i32 %r
}
define i32 @sub_zext_cmp_mask_wider_result(i8 %x) {
; CHECK-LABEL: sub_zext_cmp_mask_wider_result:
; CHECK: # %bb.0:
@ -31,6 +46,20 @@ define i8 @sub_zext_cmp_mask_narrower_result(i32 %x) {
ret i8 %r
}
define i8 @add_zext_cmp_mask_same_size_result(i8 %x) {
; CHECK-LABEL: add_zext_cmp_mask_same_size_result:
; CHECK: # %bb.0:
; CHECK-NEXT: testb $1, %dil
; CHECK-NEXT: sete %al
; CHECK-NEXT: orb $26, %al
; CHECK-NEXT: retq
%a = and i8 %x, 1
%c = icmp eq i8 %a, 0
%z = zext i1 %c to i8
%r = add i8 %z, 26
ret i8 %r
}
define i32 @add_zext_cmp_mask_wider_result(i8 %x) {
; CHECK-LABEL: add_zext_cmp_mask_wider_result:
; CHECK: # %bb.0:
@ -60,6 +89,20 @@ define i8 @add_zext_cmp_mask_narrower_result(i32 %x) {
ret i8 %r
}
define i32 @low_bit_select_constants_bigger_false_same_size_result(i32 %x) {
; CHECK-LABEL: low_bit_select_constants_bigger_false_same_size_result:
; CHECK: # %bb.0:
; CHECK-NEXT: andl $1, %edi
; CHECK-NEXT: cmpl $1, %edi
; CHECK-NEXT: movl $43, %eax
; CHECK-NEXT: sbbl $0, %eax
; CHECK-NEXT: retq
%a = and i32 %x, 1
%c = icmp eq i32 %a, 0
%r = select i1 %c, i32 42, i32 43
ret i32 %r
}
define i64 @low_bit_select_constants_bigger_false_wider_result(i32 %x) {
; CHECK-LABEL: low_bit_select_constants_bigger_false_wider_result:
; CHECK: # %bb.0:
@ -88,6 +131,19 @@ define i16 @low_bit_select_constants_bigger_false_narrower_result(i32 %x) {
ret i16 %r
}
define i8 @low_bit_select_constants_bigger_true_same_size_result(i8 %x) {
; CHECK-LABEL: low_bit_select_constants_bigger_true_same_size_result:
; CHECK: # %bb.0:
; CHECK-NEXT: testb $1, %dil
; CHECK-NEXT: sete %al
; CHECK-NEXT: orb $-30, %al
; CHECK-NEXT: retq
%a = and i8 %x, 1
%c = icmp eq i8 %a, 0
%r = select i1 %c, i8 227, i8 226
ret i8 %r
}
define i32 @low_bit_select_constants_bigger_true_wider_result(i8 %x) {
; CHECK-LABEL: low_bit_select_constants_bigger_true_wider_result:
; CHECK: # %bb.0: