| ; 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: mov w9, #95 |
| ; CHECK-NEXT: lsr w8, w8, #6 |
| ; 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: mov w9, #1060 |
| ; CHECK-NEXT: movk w8, #63310, lsl #16 |
| ; CHECK-NEXT: umull x8, w0, w8 |
| ; CHECK-NEXT: lsr x8, x8, #42 |
| ; 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: mov w9, #95 |
| ; CHECK-NEXT: lsr w8, w8, #6 |
| ; 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 x8, #58849 |
| ; CHECK-NEXT: lsr x9, x0, #1 |
| ; CHECK-NEXT: movk x8, #48148, lsl #16 |
| ; CHECK-NEXT: movk x8, #33436, lsl #32 |
| ; CHECK-NEXT: movk x8, #21399, lsl #48 |
| ; CHECK-NEXT: umulh x8, x9, x8 |
| ; CHECK-NEXT: mov w9, #98 |
| ; CHECK-NEXT: lsr x8, x8, #4 |
| ; CHECK-NEXT: msub x0, x8, x9, x0 |
| ; CHECK-NEXT: ret |
| %1 = urem i64 %x, 98 |
| ret i64 %1 |
| } |