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; RUN: llc < %s -mtriple arm-eabi -mattr=+v6t2 | FileCheck %s
; RUN: llc < %s -mtriple arm-eabi -mattr=+v6t2 -mattr=+neon | FileCheck %s
; This test checks the @llvm.cttz.* intrinsics for integers.
declare i8 @llvm.cttz.i8(i8, i1)
declare i16 @llvm.cttz.i16(i16, i1)
declare i32 @llvm.cttz.i32(i32, i1)
declare i64 @llvm.cttz.i64(i64, i1)
;------------------------------------------------------------------------------
define i8 @test_i8(i8 %a) {
; CHECK-LABEL: test_i8:
; CHECK: orr [[REG:r[0-9]+]], [[REG]], #256
; CHECK: rbit
; CHECK: clz
%tmp = call i8 @llvm.cttz.i8(i8 %a, i1 false)
ret i8 %tmp
}
define i16 @test_i16(i16 %a) {
; CHECK-LABEL: test_i16:
; CHECK: orr [[REG:r[0-9]+]], [[REG]], #65536
; CHECK: rbit
; CHECK: clz
%tmp = call i16 @llvm.cttz.i16(i16 %a, i1 false)
ret i16 %tmp
}
define i32 @test_i32(i32 %a) {
; CHECK-LABEL: test_i32:
; CHECK: rbit
; CHECK: clz
%tmp = call i32 @llvm.cttz.i32(i32 %a, i1 false)
ret i32 %tmp
}
define i64 @test_i64(i64 %a) {
; CHECK-LABEL: test_i64:
; CHECK: rbit
; CHECK: rbit
; CHECK: clz
; CHECK: cmp
; CHECK: add
; CHECK: clzne
%tmp = call i64 @llvm.cttz.i64(i64 %a, i1 false)
ret i64 %tmp
}
;------------------------------------------------------------------------------
define i8 @test_i8_zero_undef(i8 %a) {
; CHECK-LABEL: test_i8_zero_undef:
; CHECK-NOT: orr
; CHECK: rbit
; CHECK: clz
%tmp = call i8 @llvm.cttz.i8(i8 %a, i1 true)
ret i8 %tmp
}
define i16 @test_i16_zero_undef(i16 %a) {
; CHECK-LABEL: test_i16_zero_undef:
; CHECK-NOT: orr
; CHECK: rbit
; CHECK: clz
%tmp = call i16 @llvm.cttz.i16(i16 %a, i1 true)
ret i16 %tmp
}
define i32 @test_i32_zero_undef(i32 %a) {
; CHECK-LABEL: test_i32_zero_undef:
; CHECK: rbit
; CHECK: clz
%tmp = call i32 @llvm.cttz.i32(i32 %a, i1 true)
ret i32 %tmp
}
define i64 @test_i64_zero_undef(i64 %a) {
; CHECK-LABEL: test_i64_zero_undef:
; CHECK: rbit
; CHECK: rbit
; CHECK: clz
; CHECK: cmp
; CHECK: add
; CHECK: clzne
%tmp = call i64 @llvm.cttz.i64(i64 %a, i1 true)
ret i64 %tmp
}
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