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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64-unknown-linux-gnu < %s | FileCheck %s
define i32 @fold_urem_positive_odd(i32 %x) {
; CHECK-LABEL: fold_urem_positive_odd:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w8, #8969
; CHECK-NEXT: movk w8, #22765, lsl #16
; CHECK-NEXT: umull x8, w0, w8
; CHECK-NEXT: lsr x8, x8, #32
; CHECK-NEXT: sub w9, w0, w8
; CHECK-NEXT: add w8, w8, w9, lsr #1
; CHECK-NEXT: lsr w8, w8, #6
; CHECK-NEXT: mov w9, #95
; CHECK-NEXT: msub w0, w8, w9, w0
; CHECK-NEXT: ret
%1 = urem i32 %x, 95
ret i32 %1
}
define i32 @fold_urem_positive_even(i32 %x) {
; CHECK-LABEL: fold_urem_positive_even:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w8, #16323
; CHECK-NEXT: movk w8, #63310, lsl #16
; CHECK-NEXT: umull x8, w0, w8
; CHECK-NEXT: lsr x8, x8, #42
; CHECK-NEXT: mov w9, #1060
; CHECK-NEXT: msub w0, w8, w9, w0
; CHECK-NEXT: ret
%1 = urem i32 %x, 1060
ret i32 %1
}
; Don't fold if we can combine urem with udiv.
define i32 @combine_urem_udiv(i32 %x) {
; CHECK-LABEL: combine_urem_udiv:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w8, #8969
; CHECK-NEXT: movk w8, #22765, lsl #16
; CHECK-NEXT: umull x8, w0, w8
; CHECK-NEXT: lsr x8, x8, #32
; CHECK-NEXT: sub w9, w0, w8
; CHECK-NEXT: add w8, w8, w9, lsr #1
; CHECK-NEXT: lsr w8, w8, #6
; CHECK-NEXT: mov w9, #95
; CHECK-NEXT: msub w9, w8, w9, w0
; CHECK-NEXT: add w0, w9, w8
; CHECK-NEXT: ret
%1 = urem i32 %x, 95
%2 = udiv i32 %x, 95
%3 = add i32 %1, %2
ret i32 %3
}
; Don't fold for divisors that are a power of two.
define i32 @dont_fold_urem_power_of_two(i32 %x) {
; CHECK-LABEL: dont_fold_urem_power_of_two:
; CHECK: // %bb.0:
; CHECK-NEXT: and w0, w0, #0x3f
; CHECK-NEXT: ret
%1 = urem i32 %x, 64
ret i32 %1
}
; Don't fold if the divisor is one.
define i32 @dont_fold_urem_one(i32 %x) {
; CHECK-LABEL: dont_fold_urem_one:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w0, wzr
; CHECK-NEXT: ret
%1 = urem i32 %x, 1
ret i32 %1
}
; Don't fold if the divisor is 2^32.
define i32 @dont_fold_urem_i32_umax(i32 %x) {
; CHECK-LABEL: dont_fold_urem_i32_umax:
; CHECK: // %bb.0:
; CHECK-NEXT: ret
%1 = urem i32 %x, 4294967296
ret i32 %1
}
; Don't fold i64 urem
define i64 @dont_fold_urem_i64(i64 %x) {
; CHECK-LABEL: dont_fold_urem_i64:
; CHECK: // %bb.0:
; CHECK-NEXT: mov x9, #58849
; CHECK-NEXT: movk x9, #48148, lsl #16
; CHECK-NEXT: movk x9, #33436, lsl #32
; CHECK-NEXT: lsr x8, x0, #1
; CHECK-NEXT: movk x9, #21399, lsl #48
; CHECK-NEXT: umulh x8, x8, x9
; CHECK-NEXT: lsr x8, x8, #4
; CHECK-NEXT: mov w9, #98
; CHECK-NEXT: msub x0, x8, x9, x0
; CHECK-NEXT: ret
%1 = urem i64 %x, 98
ret i64 %1
}
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