0d8cd4e2d5
Add a comment when there is a shifted value,
add x9, x0, #291, lsl #12 ; =1191936
but not when the immediate value is unshifted,
subs x9, x0, #256 ; =256
when the comment adds nothing additional to the reader.
Differential Revision: https://reviews.llvm.org/D107196
70 lines
1.8 KiB
LLVM
70 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs < %s | FileCheck %s --check-prefix=CHECK
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; RUN: llc -mtriple=aarch64-linux-gnu -fast-isel -fast-isel-abort=1 -verify-machineinstrs < %s | FileCheck %s --check-prefix=CHECK
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define i32 @sdiv_i32_exact(i32 %a) {
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; CHECK-LABEL: sdiv_i32_exact:
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; CHECK: // %bb.0:
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; CHECK-NEXT: asr w0, w0, #3
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; CHECK-NEXT: ret
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%1 = sdiv exact i32 %a, 8
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ret i32 %1
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}
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define i32 @sdiv_i32_pos(i32 %a) {
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; CHECK-LABEL: sdiv_i32_pos:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add w8, w0, #7
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; CHECK-NEXT: cmp w0, #0
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; CHECK-NEXT: csel w8, w8, w0, lt
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; CHECK-NEXT: asr w0, w8, #3
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; CHECK-NEXT: ret
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%1 = sdiv i32 %a, 8
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ret i32 %1
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}
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define i32 @sdiv_i32_neg(i32 %a) {
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; CHECK-LABEL: sdiv_i32_neg:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add w8, w0, #7
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; CHECK-NEXT: cmp w0, #0
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; CHECK-NEXT: csel w8, w8, w0, lt
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; CHECK-NEXT: neg w0, w8, asr #3
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; CHECK-NEXT: ret
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%1 = sdiv i32 %a, -8
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ret i32 %1
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}
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define i64 @sdiv_i64_exact(i64 %a) {
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; CHECK-LABEL: sdiv_i64_exact:
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; CHECK: // %bb.0:
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; CHECK-NEXT: asr x0, x0, #4
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; CHECK-NEXT: ret
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%1 = sdiv exact i64 %a, 16
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ret i64 %1
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}
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define i64 @sdiv_i64_pos(i64 %a) {
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; CHECK-LABEL: sdiv_i64_pos:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add x8, x0, #15
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; CHECK-NEXT: cmp x0, #0
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; CHECK-NEXT: csel x8, x8, x0, lt
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; CHECK-NEXT: asr x0, x8, #4
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; CHECK-NEXT: ret
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%1 = sdiv i64 %a, 16
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ret i64 %1
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}
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define i64 @sdiv_i64_neg(i64 %a) {
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; CHECK-LABEL: sdiv_i64_neg:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add x8, x0, #15
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; CHECK-NEXT: cmp x0, #0
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; CHECK-NEXT: csel x8, x8, x0, lt
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; CHECK-NEXT: neg x0, x8, asr #4
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; CHECK-NEXT: ret
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%1 = sdiv i64 %a, -16
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ret i64 %1
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}
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