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