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

We likely gave up on folding some select-of-constants patterns in 
IR with rL331486, and we need to recover those in the DAG.

The tests without select are based on our current DAGCombiner 
optimizations for select-of-constants.

llvm-svn: 335390
This commit is contained in:
Sanjay Patel 2018-06-22 21:16:29 +00:00
parent a55cc4a2e9
commit 6e505e4388
1 changed files with 114 additions and 0 deletions
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114
llvm/test/CodeGen/PowerPC/bool-math.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=powerpc64le-- -verify-machineinstrs | FileCheck %s
define i32 @sub_zext_cmp_mask_wider_result(i8 %x) {
; CHECK-LABEL: sub_zext_cmp_mask_wider_result:
; CHECK: # %bb.0:
; CHECK-NEXT: nor 3, 3, 3
; CHECK-NEXT: clrlwi 3, 3, 31
; CHECK-NEXT: subfic 3, 3, 27
; CHECK-NEXT: blr
%a = and i8 %x, 1
%c = icmp eq i8 %a, 0
%z = zext i1 %c to i32
%r = sub i32 27, %z
ret i32 %r
}
define i8 @sub_zext_cmp_mask_narrower_result(i32 %x) {
; CHECK-LABEL: sub_zext_cmp_mask_narrower_result:
; CHECK: # %bb.0:
; CHECK-NEXT: nor 3, 3, 3
; CHECK-NEXT: clrlwi 3, 3, 31
; CHECK-NEXT: subfic 3, 3, 47
; CHECK-NEXT: blr
%a = and i32 %x, 1
%c = icmp eq i32 %a, 0
%z = zext i1 %c to i8
%r = sub i8 47, %z
ret i8 %r
}
define i32 @add_zext_cmp_mask_wider_result(i8 %x) {
; CHECK-LABEL: add_zext_cmp_mask_wider_result:
; CHECK: # %bb.0:
; CHECK-NEXT: xori 3, 3, 65535
; CHECK-NEXT: xoris 3, 3, 65535
; CHECK-NEXT: clrldi 3, 3, 63
; CHECK-NEXT: ori 3, 3, 26
; CHECK-NEXT: blr
%a = and i8 %x, 1
%c = icmp eq i8 %a, 0
%z = zext i1 %c to i32
%r = add i32 %z, 26
ret i32 %r
}
define i8 @add_zext_cmp_mask_narrower_result(i32 %x) {
; CHECK-LABEL: add_zext_cmp_mask_narrower_result:
; CHECK: # %bb.0:
; CHECK-NEXT: xori 3, 3, 65535
; CHECK-NEXT: xoris 3, 3, 65535
; CHECK-NEXT: clrldi 3, 3, 63
; CHECK-NEXT: ori 3, 3, 42
; CHECK-NEXT: blr
%a = and i32 %x, 1
%c = icmp eq i32 %a, 0
%z = zext i1 %c to i8
%r = add i8 %z, 42
ret i8 %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:
; CHECK-NEXT: not 3, 3
; CHECK-NEXT: clrldi 3, 3, 63
; CHECK-NEXT: subfic 3, 3, 27
; CHECK-NEXT: blr
%a = and i32 %x, 1
%c = icmp eq i32 %a, 0
%r = select i1 %c, i64 26, i64 27
ret i64 %r
}
define i16 @low_bit_select_constants_bigger_false_narrower_result(i32 %x) {
; CHECK-LABEL: low_bit_select_constants_bigger_false_narrower_result:
; CHECK: # %bb.0:
; CHECK-NEXT: nor 3, 3, 3
; CHECK-NEXT: clrlwi 3, 3, 31
; CHECK-NEXT: subfic 3, 3, 37
; CHECK-NEXT: blr
%a = and i32 %x, 1
%c = icmp eq i32 %a, 0
%r = select i1 %c, i16 36, i16 37
ret i16 %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:
; CHECK-NEXT: not 3, 3
; CHECK-NEXT: clrldi 3, 3, 63
; CHECK-NEXT: ori 3, 3, 226
; CHECK-NEXT: blr
%a = and i8 %x, 1
%c = icmp eq i8 %a, 0
%r = select i1 %c, i32 227, i32 226
ret i32 %r
}
define i8 @low_bit_select_constants_bigger_true_narrower_result(i16 %x) {
; CHECK-LABEL: low_bit_select_constants_bigger_true_narrower_result:
; CHECK: # %bb.0:
; CHECK-NEXT: xori 3, 3, 65535
; CHECK-NEXT: xoris 3, 3, 65535
; CHECK-NEXT: clrldi 3, 3, 63
; CHECK-NEXT: ori 3, 3, 40
; CHECK-NEXT: blr
%a = and i16 %x, 1
%c = icmp eq i16 %a, 0
%r = select i1 %c, i8 41, i8 40
ret i8 %r
}