874a8004f9
For now, PowerPC will using several instructions to get the constant and "and" it with the following case:
define i32 @test1(i32 %a) {
%and = and i32 %a, -2
ret i32 %and
}
However, we could exploit it with the rotate mask instructions.
MB ME
+----------------------+
|xxxxxxxxxxx00011111000|
+----------------------+
0 32 64
Notice that, we can only do it if the MB is larger than 32 and MB <= ME as
RLWINM will replace the content of [0 - 32) with [32 - 64) even we didn't rotate it.
Differential Revision: https://reviews.llvm.org/D71829
89 lines
2.0 KiB
LLVM
89 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
|
|
|
|
; mask 0xFFFFFFFE
|
|
define i32 @test1(i32 %a) {
|
|
; CHECK-LABEL: test1:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: rlwinm 3, 3, 0, 0, 30
|
|
; CHECK-NEXT: blr
|
|
%and = and i32 %a, -2
|
|
ret i32 %and
|
|
}
|
|
|
|
; mask 0xFFFFFFFFFFFFFFF9
|
|
define i64 @test2(i64 %a) {
|
|
; CHECK-LABEL: test2:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: li 4, -7
|
|
; CHECK-NEXT: and 3, 3, 4
|
|
; CHECK-NEXT: blr
|
|
%and = and i64 %a, -7
|
|
ret i64 %and
|
|
}
|
|
|
|
; mask: 0xFFFFFFC00000
|
|
define i64 @test3(i64 %a) {
|
|
; CHECK-LABEL: test3:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: lis 4, 1023
|
|
; CHECK-NEXT: ori 4, 4, 65535
|
|
; CHECK-NEXT: sldi 4, 4, 22
|
|
; CHECK-NEXT: and 3, 3, 4
|
|
; CHECK-NEXT: blr
|
|
%and = and i64 %a, 281474972516352
|
|
ret i64 %and
|
|
}
|
|
|
|
; mask: 0xC000000FF
|
|
define i64 @test4(i64 %a) {
|
|
; CHECK-LABEL: test4:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: li 4, 12
|
|
; CHECK-NEXT: sldi 4, 4, 32
|
|
; CHECK-NEXT: ori 4, 4, 255
|
|
; CHECK-NEXT: and 3, 3, 4
|
|
; CHECK-NEXT: blr
|
|
%and = and i64 %a, 51539607807
|
|
ret i64 %and
|
|
}
|
|
|
|
; mask: 0xFFC0FFFF
|
|
define i64 @test5(i64 %a) {
|
|
; CHECK-LABEL: test5:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: li 4, 0
|
|
; CHECK-NEXT: oris 4, 4, 65472
|
|
; CHECK-NEXT: ori 4, 4, 65535
|
|
; CHECK-NEXT: and 3, 3, 4
|
|
; CHECK-NEXT: blr
|
|
%and = and i64 %a, 4290838527
|
|
ret i64 %and
|
|
}
|
|
|
|
; mask: 0x3FC0FFE0
|
|
define i64 @test6(i64 %a) {
|
|
; CHECK-LABEL: test6:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: lis 4, 16320
|
|
; CHECK-NEXT: ori 4, 4, 65504
|
|
; CHECK-NEXT: and 3, 3, 4
|
|
; CHECK-NEXT: blr
|
|
%and = and i64 %a, 1069613024
|
|
ret i64 %and
|
|
}
|
|
|
|
; mask: 0x3FC000001FFFF
|
|
define i64 @test7(i64 %a) {
|
|
; CHECK-LABEL: test7:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: li 4, -32767
|
|
; CHECK-NEXT: sldi 4, 4, 32
|
|
; CHECK-NEXT: oris 4, 4, 65024
|
|
; CHECK-NEXT: rldicr 4, 4, 17, 63
|
|
; CHECK-NEXT: and 3, 3, 4
|
|
; CHECK-NEXT: blr
|
|
%and = and i64 %a, 1121501860462591
|
|
ret i64 %and
|
|
}
|