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f83e7bf498
Summary: Some constants can be handled with less instructions than our current results. And it seems our original approach is not very easy to extend. Therefore this patch proposes to materialize all 64-bit constants by enumerated patterns. I traversed almost all constants to verified the functionality of these pattens. A traversed comparison of the number of instructions used by the original method and the new method has also been completed, where no degradation was caused by this patch. This patch also passed Bootstrap test and SPEC test. Improvements of this patch are shown in llvm/test/CodeGen/PowerPC/constants-i64.ll Reviewed By: steven.zhang, stefanp Differential Revision: https://reviews.llvm.org/D92089
111 lines
2.5 KiB
LLVM
111 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s
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; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s
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define i64 @ori_test_a(i64 %a) {
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; CHECK-LABEL: ori_test_a:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: ori 3, 3, 65535
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; CHECK-NEXT: oris 3, 3, 65535
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; CHECK-NEXT: blr
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entry:
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%or = or i64 %a, 4294967295
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ret i64 %or
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}
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define i64 @ori_test_b(i64 %a) {
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; CHECK-LABEL: ori_test_b:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: li 4, -1
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; CHECK-NEXT: rldimi 3, 4, 32, 31
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; CHECK-NEXT: blr
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entry:
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%or = or i64 %a, 4294967296
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ret i64 %or
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}
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define i64 @ori_test_c(i64 %a) {
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; CHECK-LABEL: ori_test_c:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: ori 3, 3, 65535
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; CHECK-NEXT: blr
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entry:
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%or = or i64 %a, 65535
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ret i64 %or
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}
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define i64 @ori_test_d(i64 %a) {
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; CHECK-LABEL: ori_test_d:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: oris 3, 3, 1
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; CHECK-NEXT: blr
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entry:
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%or = or i64 %a, 65536
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ret i64 %or
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}
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define zeroext i32 @ori_test_e(i32 zeroext %a) {
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; CHECK-LABEL: ori_test_e:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: ori 3, 3, 65535
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; CHECK-NEXT: oris 3, 3, 255
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; CHECK-NEXT: blr
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entry:
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%or = or i32 %a, 16777215
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ret i32 %or
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}
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define i64 @xori_test_a(i64 %a) {
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; CHECK-LABEL: xori_test_a:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: xori 3, 3, 65535
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; CHECK-NEXT: xoris 3, 3, 65535
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; CHECK-NEXT: blr
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entry:
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%xor = xor i64 %a, 4294967295
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ret i64 %xor
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}
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define i64 @xori_test_b(i64 %a) {
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; CHECK-LABEL: xori_test_b:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: li 4, 1
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; CHECK-NEXT: rldic 4, 4, 32, 31
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; CHECK-NEXT: xor 3, 3, 4
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; CHECK-NEXT: blr
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entry:
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%xor = xor i64 %a, 4294967296
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ret i64 %xor
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}
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define i64 @xori_test_c(i64 %a) {
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; CHECK-LABEL: xori_test_c:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: xori 3, 3, 65535
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; CHECK-NEXT: blr
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entry:
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%xor = xor i64 %a, 65535
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ret i64 %xor
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}
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define i64 @xori_test_d(i64 %a) {
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; CHECK-LABEL: xori_test_d:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: xoris 3, 3, 1
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; CHECK-NEXT: blr
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entry:
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%xor = xor i64 %a, 65536
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ret i64 %xor
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}
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define zeroext i32 @xori_test_e(i32 zeroext %a) {
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; CHECK-LABEL: xori_test_e:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: xori 3, 3, 65535
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; CHECK-NEXT: xoris 3, 3, 255
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; CHECK-NEXT: blr
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entry:
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%xor = xor i32 %a, 16777215
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ret i32 %xor
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}
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