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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=aarch64-apple-darwin | FileCheck %s
declare i16 @llvm.bswap.i16(i16)
declare i32 @llvm.bswap.i32(i32)
declare i64 @llvm.bswap.i64(i64)
define i1 @test1(i16 %arg) {
; CHECK-LABEL: test1:
; CHECK: ; %bb.0:
; CHECK-NEXT: mov w0, #1
; CHECK-NEXT: ret
%a = or i16 %arg, 511
%b = call i16 @llvm.bswap.i16(i16 %a)
%and = and i16 %b, 256
%res = icmp eq i16 %and, 256
ret i1 %res
}
define i1 @test2(i16 %arg) {
; CHECK-LABEL: test2:
; CHECK: ; %bb.0:
; CHECK-NEXT: mov w0, #1
; CHECK-NEXT: ret
%a = or i16 %arg, 1
%b = call i16 @llvm.bswap.i16(i16 %a)
%and = and i16 %b, 256
%res = icmp eq i16 %and, 256
ret i1 %res
}
define i1 @test3(i16 %arg) {
; CHECK-LABEL: test3:
; CHECK: ; %bb.0:
; CHECK-NEXT: mov w0, #1
; CHECK-NEXT: ret
%a = or i16 %arg, 256
%b = call i16 @llvm.bswap.i16(i16 %a)
%and = and i16 %b, 1
%res = icmp eq i16 %and, 1
ret i1 %res
}
define i1 @test4(i32 %arg) {
; CHECK-LABEL: test4:
; CHECK: ; %bb.0:
; CHECK-NEXT: mov w0, #1
; CHECK-NEXT: ret
%a = or i32 %arg, 2147483647 ; i32_MAX
%b = call i32 @llvm.bswap.i32(i32 %a)
%and = and i32 %b, 127
%res = icmp eq i32 %and, 127
ret i1 %res
}
define i8 @demand_one_byte0(i32 %x) {
; CHECK-LABEL: demand_one_byte0:
; CHECK: ; %bb.0:
; CHECK-NEXT: rev w0, w0
; CHECK-NEXT: ret
%b = call i32 @llvm.bswap.i32(i32 %x)
%r = trunc i32 %b to i8
ret i8 %r
}
define i32 @demand_one_byte1(i32 %x) {
; CHECK-LABEL: demand_one_byte1:
; CHECK: ; %bb.0:
; CHECK-NEXT: lsr w8, w0, #8
; CHECK-NEXT: and w0, w8, #0xff00
; CHECK-NEXT: ret
%b = call i32 @llvm.bswap.i32(i32 %x)
%r = and i32 %b, 65280 ; 0x0000ff00
ret i32 %r
}
define i32 @demand_one_byte2(i32 %x) {
; CHECK-LABEL: demand_one_byte2:
; CHECK: ; %bb.0:
; CHECK-NEXT: lsl w8, w0, #8
; CHECK-NEXT: orr w0, w8, #0xff00ffff
; CHECK-NEXT: ret
%b = call i32 @llvm.bswap.i32(i32 %x)
%r = or i32 %b, 4278255615 ; 0xff00ffff
ret i32 %r
}
define i64 @demand_one_byte3(i64 %x) {
; CHECK-LABEL: demand_one_byte3:
; CHECK: ; %bb.0:
; CHECK-NEXT: and x0, x0, #0xff
; CHECK-NEXT: ret
%b = call i64 @llvm.bswap.i64(i64 %x)
%r = lshr i64 %b, 56
ret i64 %r
}
define void @demand_one_loaded_byte(i64* %xp, i32* %yp) {
; CHECK-LABEL: demand_one_loaded_byte:
; CHECK: ; %bb.0:
; CHECK-NEXT: ldrb w8, [x0, #4]
; CHECK-NEXT: strb w8, [x1]
; CHECK-NEXT: ret
%x = load i64, i64* %xp, align 8
%x_zzzz7654 = lshr i64 %x, 32
%x_z7654zzz = shl nuw nsw i64 %x_zzzz7654, 24
%x_4zzz = trunc i64 %x_z7654zzz to i32
%y = load i32, i32* %yp, align 4
%y_321z = and i32 %y, -256
%x_zzz4 = call i32 @llvm.bswap.i32(i32 %x_4zzz)
%r = or i32 %x_zzz4, %y_321z
store i32 %r, i32* %yp, align 4
ret void
}
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