derek.holloway
7502bf64a4
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143 lines
4.5 KiB
LLVM
143 lines
4.5 KiB
LLVM
; 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 --check-prefixes=CHECK,CHECK-SD
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; RUN: llc -mtriple=aarch64-unknown-linux-gnu -global-isel < %s | FileCheck %s --check-prefixes=CHECK,CHECK-GI
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define i32 @fold_urem_positive_odd(i32 %x) {
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; CHECK-SD-LABEL: fold_urem_positive_odd:
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; CHECK-SD: // %bb.0:
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; CHECK-SD-NEXT: mov x8, #301989888 // =0x12000000
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; CHECK-SD-NEXT: mov w9, w0
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; CHECK-SD-NEXT: movk x8, #55878, lsl #32
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; CHECK-SD-NEXT: movk x8, #689, lsl #48
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; CHECK-SD-NEXT: umulh x8, x9, x8
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; CHECK-SD-NEXT: mov w9, #95 // =0x5f
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; CHECK-SD-NEXT: msub w0, w8, w9, w0
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; CHECK-SD-NEXT: ret
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;
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; CHECK-GI-LABEL: fold_urem_positive_odd:
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; CHECK-GI: // %bb.0:
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; CHECK-GI-NEXT: mov w8, #8969 // =0x2309
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; CHECK-GI-NEXT: movk w8, #22765, lsl #16
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; CHECK-GI-NEXT: umull x8, w0, w8
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; CHECK-GI-NEXT: lsr x8, x8, #32
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; CHECK-GI-NEXT: sub w9, w0, w8
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; CHECK-GI-NEXT: add w8, w8, w9, lsr #1
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; CHECK-GI-NEXT: mov w9, #-95 // =0xffffffa1
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; CHECK-GI-NEXT: lsr w8, w8, #6
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; CHECK-GI-NEXT: madd w0, w8, w9, w0
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; CHECK-GI-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-SD-LABEL: fold_urem_positive_even:
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; CHECK-SD: // %bb.0:
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; CHECK-SD-NEXT: mov w8, #16323 // =0x3fc3
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; CHECK-SD-NEXT: mov w9, #1060 // =0x424
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; CHECK-SD-NEXT: movk w8, #63310, lsl #16
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; CHECK-SD-NEXT: umull x8, w0, w8
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; CHECK-SD-NEXT: lsr x8, x8, #42
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; CHECK-SD-NEXT: msub w0, w8, w9, w0
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; CHECK-SD-NEXT: ret
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;
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; CHECK-GI-LABEL: fold_urem_positive_even:
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; CHECK-GI: // %bb.0:
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; CHECK-GI-NEXT: mov w8, #16323 // =0x3fc3
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; CHECK-GI-NEXT: mov w9, #-1060 // =0xfffffbdc
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; CHECK-GI-NEXT: movk w8, #63310, lsl #16
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; CHECK-GI-NEXT: umull x8, w0, w8
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; CHECK-GI-NEXT: lsr x8, x8, #42
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; CHECK-GI-NEXT: madd w0, w8, w9, w0
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; CHECK-GI-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-SD-LABEL: combine_urem_udiv:
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; CHECK-SD: // %bb.0:
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; CHECK-SD-NEXT: mov x8, #301989888 // =0x12000000
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; CHECK-SD-NEXT: mov w9, w0
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; CHECK-SD-NEXT: movk x8, #55878, lsl #32
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; CHECK-SD-NEXT: movk x8, #689, lsl #48
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; CHECK-SD-NEXT: umulh x8, x9, x8
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; CHECK-SD-NEXT: mov w9, #95 // =0x5f
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; CHECK-SD-NEXT: msub w9, w8, w9, w0
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; CHECK-SD-NEXT: add w0, w9, w8
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; CHECK-SD-NEXT: ret
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;
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; CHECK-GI-LABEL: combine_urem_udiv:
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; CHECK-GI: // %bb.0:
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; CHECK-GI-NEXT: mov w8, #95 // =0x5f
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; CHECK-GI-NEXT: udiv w9, w0, w8
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; CHECK-GI-NEXT: msub w8, w9, w8, w0
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; CHECK-GI-NEXT: add w0, w8, w9
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; CHECK-GI-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-SD-LABEL: dont_fold_urem_i64:
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; CHECK-SD: // %bb.0:
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; CHECK-SD-NEXT: mov x9, #58849 // =0xe5e1
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; CHECK-SD-NEXT: lsr x8, x0, #1
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; CHECK-SD-NEXT: movk x9, #48148, lsl #16
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; CHECK-SD-NEXT: movk x9, #33436, lsl #32
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; CHECK-SD-NEXT: movk x9, #21399, lsl #48
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; CHECK-SD-NEXT: umulh x8, x8, x9
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; CHECK-SD-NEXT: mov w9, #98 // =0x62
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; CHECK-SD-NEXT: lsr x8, x8, #4
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; CHECK-SD-NEXT: msub x0, x8, x9, x0
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; CHECK-SD-NEXT: ret
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;
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; CHECK-GI-LABEL: dont_fold_urem_i64:
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; CHECK-GI: // %bb.0:
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; CHECK-GI-NEXT: mov x9, #58849 // =0xe5e1
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; CHECK-GI-NEXT: lsr x8, x0, #1
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; CHECK-GI-NEXT: movk x9, #48148, lsl #16
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; CHECK-GI-NEXT: movk x9, #33436, lsl #32
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; CHECK-GI-NEXT: movk x9, #21399, lsl #48
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; CHECK-GI-NEXT: umulh x8, x8, x9
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; CHECK-GI-NEXT: mov x9, #-98 // =0xffffffffffffff9e
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; CHECK-GI-NEXT: lsr x8, x8, #4
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; CHECK-GI-NEXT: madd x0, x8, x9, x0
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; CHECK-GI-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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