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; RUN: llc -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s
; CHECK-LABEL: @test1
; CHECK: sbfx {{x[0-9]+}}, x0, #23, #9
define i64 @test1(i32 %a) {
%tmp = ashr i32 %a, 23
%ext = sext i32 %tmp to i64
%res = add i64 %ext, 1
ret i64 %res
}
; CHECK-LABEL: @test2
; CHECK: sbfx w0, w0, #23, #8
define signext i8 @test2(i32 %a) {
%tmp = ashr i32 %a, 23
%res = trunc i32 %tmp to i8
ret i8 %res
}
; CHECK-LABEL: @test3
; CHECK: sbfx w0, w0, #23, #8
define signext i8 @test3(i32 %a) {
%tmp = lshr i32 %a, 23
%res = trunc i32 %tmp to i8
ret i8 %res
}
; CHECK-LABEL: @test4
; CHECK: sbfx w0, w0, #15, #16
define signext i16 @test4(i32 %a) {
%tmp = lshr i32 %a, 15
%res = trunc i32 %tmp to i16
ret i16 %res
}
; CHECK-LABEL: @test5
; CHECK: sbfx w0, w0, #16, #8
define signext i8 @test5(i64 %a) {
%tmp = lshr i64 %a, 16
%res = trunc i64 %tmp to i8
ret i8 %res
}
; CHECK-LABEL: @test6
; CHECK: sbfx x0, x0, #30, #8
define signext i8 @test6(i64 %a) {
%tmp = lshr i64 %a, 30
%res = trunc i64 %tmp to i8
ret i8 %res
}
; CHECK-LABEL: @test7
; CHECK: sbfx x0, x0, #23, #16
define signext i16 @test7(i64 %a) {
%tmp = lshr i64 %a, 23
%res = trunc i64 %tmp to i16
ret i16 %res
}
; CHECK-LABEL: @test8
; CHECK: asr w0, w0, #25
define signext i8 @test8(i32 %a) {
%tmp = ashr i32 %a, 25
%res = trunc i32 %tmp to i8
ret i8 %res
}
; CHECK-LABEL: @test9
; CHECK: lsr w0, w0, #25
define signext i8 @test9(i32 %a) {
%tmp = lshr i32 %a, 25
%res = trunc i32 %tmp to i8
ret i8 %res
}
; CHECK-LABEL: @test10
; CHECK: lsr x0, x0, #49
define signext i16 @test10(i64 %a) {
%tmp = lshr i64 %a, 49
%res = trunc i64 %tmp to i16
ret i16 %res
}
; SHR with multiple uses is fine as SXTH and SBFX are both aliases of SBFM.
; However, allowing the transformation means the SHR and SBFX can execute in
; parallel.
;
; CHECK-LABEL: @test11
; CHECK: lsr x1, x0, #23
; CHECK: sbfx x0, x0, #23, #16
define void @test11(i64 %a) {
%tmp = lshr i64 %a, 23
%res = trunc i64 %tmp to i16
call void @use(i16 %res, i64 %tmp)
ret void
}
declare void @use(i16 signext, i64)
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