forked from OSchip/llvm-project
[DAGCombine] add tests for bitreverse-shift optimization
This patch add some tests to show some optimization opportunities for bitreverse-shift. Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D121507
This commit is contained in:
Chenbing Zheng
parent
b578330754
commit
780eb9f586
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@ -0,0 +1,223 @@
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=riscv32 -mattr=+zbkb -verify-machineinstrs < %s \
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; RUN: | FileCheck %s -check-prefixes=RV32ZBKB
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; RUN: llc -mtriple=riscv64 -mattr=+zbkb -verify-machineinstrs < %s \
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; RUN: | FileCheck %s -check-prefixes=RV64ZBKB
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; TODO: These tests can be optmised
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; fold (bitreverse(srl (bitreverse c), x)) -> (shl c, x)
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; fold (bitreverse(shl (bitreverse c), x)) -> (srl c, x)
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declare i8 @llvm.bitreverse.i8(i8)
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declare i16 @llvm.bitreverse.i16(i16)
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declare i32 @llvm.bitreverse.i32(i32)
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declare i64 @llvm.bitreverse.i64(i64)
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define i8 @test_bitreverse_srli_bitreverse_i8(i8 %a) nounwind {
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; RV32ZBKB-LABEL: test_bitreverse_srli_bitreverse_i8:
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; RV32ZBKB: # %bb.0:
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 27
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 24
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; RV32ZBKB-NEXT: ret
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;
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; RV64ZBKB-LABEL: test_bitreverse_srli_bitreverse_i8:
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; RV64ZBKB: # %bb.0:
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 59
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 56
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; RV64ZBKB-NEXT: ret
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%1 = call i8 @llvm.bitreverse.i8(i8 %a)
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%2 = lshr i8 %1, 3
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%3 = call i8 @llvm.bitreverse.i8(i8 %2)
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ret i8 %3
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}
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define i16 @test_bitreverse_srli_bitreverse_i16(i16 %a) nounwind {
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; RV32ZBKB-LABEL: test_bitreverse_srli_bitreverse_i16:
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; RV32ZBKB: # %bb.0:
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 23
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 16
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; RV32ZBKB-NEXT: ret
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;
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; RV64ZBKB-LABEL: test_bitreverse_srli_bitreverse_i16:
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; RV64ZBKB: # %bb.0:
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 55
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 48
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; RV64ZBKB-NEXT: ret
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%1 = call i16 @llvm.bitreverse.i16(i16 %a)
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%2 = lshr i16 %1, 7
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%3 = call i16 @llvm.bitreverse.i16(i16 %2)
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ret i16 %3
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}
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define i32 @test_bitreverse_srli_bitreverse_i32(i32 %a) nounwind {
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; RV32ZBKB-LABEL: test_bitreverse_srli_bitreverse_i32:
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; RV32ZBKB: # %bb.0:
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 15
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: ret
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;
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; RV64ZBKB-LABEL: test_bitreverse_srli_bitreverse_i32:
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; RV64ZBKB: # %bb.0:
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 47
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 32
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; RV64ZBKB-NEXT: ret
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%1 = call i32 @llvm.bitreverse.i32(i32 %a)
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%2 = lshr i32 %1, 15
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%3 = call i32 @llvm.bitreverse.i32(i32 %2)
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ret i32 %3
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}
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define i64 @test_bitreverse_srli_bitreverse_i64(i64 %a) nounwind {
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; RV32ZBKB-LABEL: test_bitreverse_srli_bitreverse_i64:
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; RV32ZBKB: # %bb.0:
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 1
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a1, a0
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; RV32ZBKB-NEXT: li a0, 0
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; RV32ZBKB-NEXT: ret
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;
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; RV64ZBKB-LABEL: test_bitreverse_srli_bitreverse_i64:
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; RV64ZBKB: # %bb.0:
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 33
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: ret
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%1 = call i64 @llvm.bitreverse.i64(i64 %a)
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%2 = lshr i64 %1, 33
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%3 = call i64 @llvm.bitreverse.i64(i64 %2)
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ret i64 %3
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}
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define i8 @test_bitreverse_shli_bitreverse_i8(i8 %a) nounwind {
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; RV32ZBKB-LABEL: test_bitreverse_shli_bitreverse_i8:
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; RV32ZBKB: # %bb.0:
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 21
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; RV32ZBKB-NEXT: andi a0, a0, 2040
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 24
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; RV32ZBKB-NEXT: ret
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;
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; RV64ZBKB-LABEL: test_bitreverse_shli_bitreverse_i8:
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; RV64ZBKB: # %bb.0:
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 53
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; RV64ZBKB-NEXT: andi a0, a0, 2040
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 56
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; RV64ZBKB-NEXT: ret
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%1 = call i8 @llvm.bitreverse.i8(i8 %a)
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%2 = shl i8 %1, 3
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%3 = call i8 @llvm.bitreverse.i8(i8 %2)
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ret i8 %3
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}
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define i16 @test_bitreverse_shli_bitreverse_i16(i16 %a) nounwind {
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; RV32ZBKB-LABEL: test_bitreverse_shli_bitreverse_i16:
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; RV32ZBKB: # %bb.0:
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 9
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; RV32ZBKB-NEXT: andi a0, a0, -128
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: srli a0, a0, 16
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; RV32ZBKB-NEXT: ret
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;
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; RV64ZBKB-LABEL: test_bitreverse_shli_bitreverse_i16:
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; RV64ZBKB: # %bb.0:
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 41
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; RV64ZBKB-NEXT: andi a0, a0, -128
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 48
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; RV64ZBKB-NEXT: ret
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%1 = call i16 @llvm.bitreverse.i16(i16 %a)
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%2 = shl i16 %1, 7
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%3 = call i16 @llvm.bitreverse.i16(i16 %2)
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ret i16 %3
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}
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define i32 @test_bitreverse_shli_bitreverse_i32(i32 %a) nounwind {
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; RV32ZBKB-LABEL: test_bitreverse_shli_bitreverse_i32:
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; RV32ZBKB: # %bb.0:
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: slli a0, a0, 15
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: ret
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;
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; RV64ZBKB-LABEL: test_bitreverse_shli_bitreverse_i32:
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; RV64ZBKB: # %bb.0:
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 32
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; RV64ZBKB-NEXT: slli a0, a0, 15
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: srli a0, a0, 32
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; RV64ZBKB-NEXT: ret
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%1 = call i32 @llvm.bitreverse.i32(i32 %a)
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%2 = shl i32 %1, 15
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%3 = call i32 @llvm.bitreverse.i32(i32 %2)
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ret i32 %3
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}
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define i64 @test_bitreverse_shli_bitreverse_i64(i64 %a) nounwind {
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; RV32ZBKB-LABEL: test_bitreverse_shli_bitreverse_i64:
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; RV32ZBKB: # %bb.0:
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; RV32ZBKB-NEXT: rev8 a0, a1
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: slli a0, a0, 1
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; RV32ZBKB-NEXT: rev8 a0, a0
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; RV32ZBKB-NEXT: brev8 a0, a0
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; RV32ZBKB-NEXT: li a1, 0
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; RV32ZBKB-NEXT: ret
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;
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; RV64ZBKB-LABEL: test_bitreverse_shli_bitreverse_i64:
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; RV64ZBKB: # %bb.0:
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: slli a0, a0, 33
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; RV64ZBKB-NEXT: rev8 a0, a0
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; RV64ZBKB-NEXT: brev8 a0, a0
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; RV64ZBKB-NEXT: ret
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%1 = call i64 @llvm.bitreverse.i64(i64 %a)
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%2 = shl i64 %1, 33
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%3 = call i64 @llvm.bitreverse.i64(i64 %2)
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ret i64 %3
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}
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@ -6,6 +6,7 @@
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; actual output is massive at the moment as llvm.bitreverse is not yet legal.
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declare i32 @llvm.bitreverse.i32(i32) readnone
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declare i64 @llvm.bitreverse.i64(i64) readnone
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declare <4 x i32> @llvm.bitreverse.v4i32(<4 x i32>) readnone
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; fold (bitreverse undef) -> undef
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@ -37,6 +38,361 @@ define i32 @test_bitreverse_bitreverse(i32 %a0) nounwind {
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ret i32 %c
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}
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; TODO: fold (bitreverse(srl (bitreverse c), x)) -> (shl c, x)
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define i32 @test_bitreverse_srli_bitreverse(i32 %a0) nounwind {
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; X86-LABEL: test_bitreverse_srli_bitreverse:
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; X86: # %bb.0:
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; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X86-NEXT: bswapl %eax
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; X86-NEXT: movl %eax, %ecx
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; X86-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
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; X86-NEXT: shll $4, %ecx
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; X86-NEXT: shrl $4, %eax
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; X86-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
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; X86-NEXT: orl %ecx, %eax
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; X86-NEXT: movl %eax, %ecx
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; X86-NEXT: andl $858993459, %ecx # imm = 0x33333333
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; X86-NEXT: shrl $2, %eax
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; X86-NEXT: andl $858993459, %eax # imm = 0x33333333
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; X86-NEXT: leal (%eax,%ecx,4), %eax
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; X86-NEXT: movl %eax, %ecx
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; X86-NEXT: andl $1431655744, %ecx # imm = 0x55555540
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; X86-NEXT: shrl %eax
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; X86-NEXT: andl $1431655680, %eax # imm = 0x55555500
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; X86-NEXT: leal (%eax,%ecx,2), %eax
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; X86-NEXT: shrl $7, %eax
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; X86-NEXT: bswapl %eax
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; X86-NEXT: movl %eax, %ecx
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; X86-NEXT: andl $252645121, %ecx # imm = 0xF0F0F01
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; X86-NEXT: shll $4, %ecx
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; X86-NEXT: shrl $4, %eax
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; X86-NEXT: andl $252645120, %eax # imm = 0xF0F0F00
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; X86-NEXT: orl %ecx, %eax
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; X86-NEXT: movl %eax, %ecx
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; X86-NEXT: andl $858993424, %ecx # imm = 0x33333310
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; X86-NEXT: shrl $2, %eax
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; X86-NEXT: andl $858993408, %eax # imm = 0x33333300
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; X86-NEXT: leal (%eax,%ecx,4), %eax
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; X86-NEXT: movl %eax, %ecx
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; X86-NEXT: andl $1431655765, %ecx # imm = 0x55555555
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; X86-NEXT: shrl %eax
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; X86-NEXT: andl $1431655765, %eax # imm = 0x55555555
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; X86-NEXT: leal (%eax,%ecx,2), %eax
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; X86-NEXT: retl
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;
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; X64-LABEL: test_bitreverse_srli_bitreverse:
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; X64: # %bb.0:
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; X64-NEXT: # kill: def $edi killed $edi def $rdi
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; X64-NEXT: bswapl %edi
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; X64-NEXT: movl %edi, %eax
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; X64-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
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; X64-NEXT: shll $4, %eax
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; X64-NEXT: shrl $4, %edi
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; X64-NEXT: andl $252645135, %edi # imm = 0xF0F0F0F
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; X64-NEXT: orl %eax, %edi
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; X64-NEXT: movl %edi, %eax
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; X64-NEXT: andl $858993459, %eax # imm = 0x33333333
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; X64-NEXT: shrl $2, %edi
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; X64-NEXT: andl $858993459, %edi # imm = 0x33333333
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; X64-NEXT: leal (%rdi,%rax,4), %eax
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; X64-NEXT: movl %eax, %ecx
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; X64-NEXT: andl $1431655744, %ecx # imm = 0x55555540
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; X64-NEXT: shrl %eax
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; X64-NEXT: andl $1431655680, %eax # imm = 0x55555500
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; X64-NEXT: leal (%rax,%rcx,2), %eax
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; X64-NEXT: shrl $7, %eax
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; X64-NEXT: bswapl %eax
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; X64-NEXT: movl %eax, %ecx
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; X64-NEXT: andl $252645121, %ecx # imm = 0xF0F0F01
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; X64-NEXT: shll $4, %ecx
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; X64-NEXT: shrl $4, %eax
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; X64-NEXT: andl $252645120, %eax # imm = 0xF0F0F00
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; X64-NEXT: orl %ecx, %eax
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; X64-NEXT: movl %eax, %ecx
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; X64-NEXT: andl $858993424, %ecx # imm = 0x33333310
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; X64-NEXT: shrl $2, %eax
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; X64-NEXT: andl $858993408, %eax # imm = 0x33333300
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; X64-NEXT: leal (%rax,%rcx,4), %eax
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; X64-NEXT: movl %eax, %ecx
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; X64-NEXT: andl $1431655765, %ecx # imm = 0x55555555
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; X64-NEXT: shrl %eax
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; X64-NEXT: andl $1431655765, %eax # imm = 0x55555555
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; X64-NEXT: leal (%rax,%rcx,2), %eax
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; X64-NEXT: retq
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%b = call i32 @llvm.bitreverse.i32(i32 %a0)
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%c = lshr i32 %b, 7
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%d = call i32 @llvm.bitreverse.i32(i32 %c)
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ret i32 %d
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}
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define i64 @test_bitreverse_srli_bitreverse_i64(i64 %a) nounwind {
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; X86-LABEL: test_bitreverse_srli_bitreverse_i64:
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; X86: # %bb.0:
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; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X86-NEXT: bswapl %eax
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; X86-NEXT: movl %eax, %ecx
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; X86-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
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; X86-NEXT: shll $4, %ecx
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; X86-NEXT: shrl $4, %eax
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; X86-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
|
||||
; X86-NEXT: orl %ecx, %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $858993459, %ecx # imm = 0x33333333
|
||||
; X86-NEXT: shrl $2, %eax
|
||||
; X86-NEXT: andl $858993459, %eax # imm = 0x33333333
|
||||
; X86-NEXT: leal (%eax,%ecx,4), %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $1431655765, %ecx # imm = 0x55555555
|
||||
; X86-NEXT: shrl %eax
|
||||
; X86-NEXT: andl $1431655764, %eax # imm = 0x55555554
|
||||
; X86-NEXT: leal (%eax,%ecx,2), %eax
|
||||
; X86-NEXT: shrl %eax
|
||||
; X86-NEXT: bswapl %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
|
||||
; X86-NEXT: shll $4, %ecx
|
||||
; X86-NEXT: shrl $4, %eax
|
||||
; X86-NEXT: andl $252645127, %eax # imm = 0xF0F0F07
|
||||
; X86-NEXT: orl %ecx, %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $858993459, %ecx # imm = 0x33333333
|
||||
; X86-NEXT: shrl $2, %eax
|
||||
; X86-NEXT: andl $858993457, %eax # imm = 0x33333331
|
||||
; X86-NEXT: leal (%eax,%ecx,4), %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $1431655765, %ecx # imm = 0x55555555
|
||||
; X86-NEXT: shrl %eax
|
||||
; X86-NEXT: andl $1431655765, %eax # imm = 0x55555555
|
||||
; X86-NEXT: leal (%eax,%ecx,2), %edx
|
||||
; X86-NEXT: xorl %eax, %eax
|
||||
; X86-NEXT: retl
|
||||
;
|
||||
; X64-LABEL: test_bitreverse_srli_bitreverse_i64:
|
||||
; X64: # %bb.0:
|
||||
; X64-NEXT: bswapq %rdi
|
||||
; X64-NEXT: movq %rdi, %rax
|
||||
; X64-NEXT: shrq $4, %rax
|
||||
; X64-NEXT: movabsq $1085102592571150095, %rcx # imm = 0xF0F0F0F0F0F0F0F
|
||||
; X64-NEXT: andq %rcx, %rax
|
||||
; X64-NEXT: andq %rcx, %rdi
|
||||
; X64-NEXT: shlq $4, %rdi
|
||||
; X64-NEXT: orq %rax, %rdi
|
||||
; X64-NEXT: movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
|
||||
; X64-NEXT: movq %rdi, %rcx
|
||||
; X64-NEXT: andq %rax, %rcx
|
||||
; X64-NEXT: shrq $2, %rdi
|
||||
; X64-NEXT: andq %rax, %rdi
|
||||
; X64-NEXT: leaq (%rdi,%rcx,4), %rax
|
||||
; X64-NEXT: movabsq $6148914689804861440, %rcx # imm = 0x5555555500000000
|
||||
; X64-NEXT: andq %rax, %rcx
|
||||
; X64-NEXT: shrq %rax
|
||||
; X64-NEXT: movabsq $6148914685509894144, %rdx # imm = 0x5555555400000000
|
||||
; X64-NEXT: andq %rax, %rdx
|
||||
; X64-NEXT: leaq (%rdx,%rcx,2), %rax
|
||||
; X64-NEXT: shrq $33, %rax
|
||||
; X64-NEXT: bswapq %rax
|
||||
; X64-NEXT: movabsq $1085102592318504960, %rcx # imm = 0xF0F0F0F00000000
|
||||
; X64-NEXT: andq %rax, %rcx
|
||||
; X64-NEXT: shrq $4, %rax
|
||||
; X64-NEXT: movabsq $1085102557958766592, %rdx # imm = 0xF0F0F0700000000
|
||||
; X64-NEXT: andq %rax, %rdx
|
||||
; X64-NEXT: shlq $4, %rcx
|
||||
; X64-NEXT: orq %rdx, %rcx
|
||||
; X64-NEXT: movabsq $3689348813882916864, %rax # imm = 0x3333333300000000
|
||||
; X64-NEXT: andq %rcx, %rax
|
||||
; X64-NEXT: shrq $2, %rcx
|
||||
; X64-NEXT: movabsq $3689348805292982272, %rdx # imm = 0x3333333100000000
|
||||
; X64-NEXT: andq %rcx, %rdx
|
||||
; X64-NEXT: leaq (%rdx,%rax,4), %rax
|
||||
; X64-NEXT: movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
|
||||
; X64-NEXT: movq %rax, %rdx
|
||||
; X64-NEXT: andq %rcx, %rdx
|
||||
; X64-NEXT: shrq %rax
|
||||
; X64-NEXT: andq %rcx, %rax
|
||||
; X64-NEXT: leaq (%rax,%rdx,2), %rax
|
||||
; X64-NEXT: retq
|
||||
%1 = call i64 @llvm.bitreverse.i64(i64 %a)
|
||||
%2 = lshr i64 %1, 33
|
||||
%3 = call i64 @llvm.bitreverse.i64(i64 %2)
|
||||
ret i64 %3
|
||||
}
|
||||
|
||||
; TODO: fold (bitreverse(shl (bitreverse c), x)) -> (srl c, x)
|
||||
define i32 @test_bitreverse_shli_bitreverse(i32 %a0) nounwind {
|
||||
; X86-LABEL: test_bitreverse_shli_bitreverse:
|
||||
; X86: # %bb.0:
|
||||
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
||||
; X86-NEXT: bswapl %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
|
||||
; X86-NEXT: shll $4, %ecx
|
||||
; X86-NEXT: shrl $4, %eax
|
||||
; X86-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
|
||||
; X86-NEXT: orl %ecx, %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $858993459, %ecx # imm = 0x33333333
|
||||
; X86-NEXT: shrl $2, %eax
|
||||
; X86-NEXT: andl $858993459, %eax # imm = 0x33333333
|
||||
; X86-NEXT: leal (%eax,%ecx,4), %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $5592405, %ecx # imm = 0x555555
|
||||
; X86-NEXT: shrl %eax
|
||||
; X86-NEXT: andl $22369621, %eax # imm = 0x1555555
|
||||
; X86-NEXT: leal (%eax,%ecx,2), %eax
|
||||
; X86-NEXT: shll $7, %eax
|
||||
; X86-NEXT: bswapl %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $986895, %ecx # imm = 0xF0F0F
|
||||
; X86-NEXT: shll $4, %ecx
|
||||
; X86-NEXT: shrl $4, %eax
|
||||
; X86-NEXT: andl $135204623, %eax # imm = 0x80F0F0F
|
||||
; X86-NEXT: orl %ecx, %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $3355443, %ecx # imm = 0x333333
|
||||
; X86-NEXT: shrl $2, %eax
|
||||
; X86-NEXT: andl $36909875, %eax # imm = 0x2333333
|
||||
; X86-NEXT: leal (%eax,%ecx,4), %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $1431655765, %ecx # imm = 0x55555555
|
||||
; X86-NEXT: shrl %eax
|
||||
; X86-NEXT: andl $1431655765, %eax # imm = 0x55555555
|
||||
; X86-NEXT: leal (%eax,%ecx,2), %eax
|
||||
; X86-NEXT: retl
|
||||
;
|
||||
; X64-LABEL: test_bitreverse_shli_bitreverse:
|
||||
; X64: # %bb.0:
|
||||
; X64-NEXT: # kill: def $edi killed $edi def $rdi
|
||||
; X64-NEXT: bswapl %edi
|
||||
; X64-NEXT: movl %edi, %eax
|
||||
; X64-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
|
||||
; X64-NEXT: shll $4, %eax
|
||||
; X64-NEXT: shrl $4, %edi
|
||||
; X64-NEXT: andl $252645135, %edi # imm = 0xF0F0F0F
|
||||
; X64-NEXT: orl %eax, %edi
|
||||
; X64-NEXT: movl %edi, %eax
|
||||
; X64-NEXT: andl $858993459, %eax # imm = 0x33333333
|
||||
; X64-NEXT: shrl $2, %edi
|
||||
; X64-NEXT: andl $858993459, %edi # imm = 0x33333333
|
||||
; X64-NEXT: leal (%rdi,%rax,4), %eax
|
||||
; X64-NEXT: movl %eax, %ecx
|
||||
; X64-NEXT: andl $5592405, %ecx # imm = 0x555555
|
||||
; X64-NEXT: shrl %eax
|
||||
; X64-NEXT: andl $22369621, %eax # imm = 0x1555555
|
||||
; X64-NEXT: leal (%rax,%rcx,2), %eax
|
||||
; X64-NEXT: shll $7, %eax
|
||||
; X64-NEXT: bswapl %eax
|
||||
; X64-NEXT: movl %eax, %ecx
|
||||
; X64-NEXT: andl $986895, %ecx # imm = 0xF0F0F
|
||||
; X64-NEXT: shll $4, %ecx
|
||||
; X64-NEXT: shrl $4, %eax
|
||||
; X64-NEXT: andl $135204623, %eax # imm = 0x80F0F0F
|
||||
; X64-NEXT: orl %ecx, %eax
|
||||
; X64-NEXT: movl %eax, %ecx
|
||||
; X64-NEXT: andl $3355443, %ecx # imm = 0x333333
|
||||
; X64-NEXT: shrl $2, %eax
|
||||
; X64-NEXT: andl $36909875, %eax # imm = 0x2333333
|
||||
; X64-NEXT: leal (%rax,%rcx,4), %eax
|
||||
; X64-NEXT: movl %eax, %ecx
|
||||
; X64-NEXT: andl $1431655765, %ecx # imm = 0x55555555
|
||||
; X64-NEXT: shrl %eax
|
||||
; X64-NEXT: andl $1431655765, %eax # imm = 0x55555555
|
||||
; X64-NEXT: leal (%rax,%rcx,2), %eax
|
||||
; X64-NEXT: retq
|
||||
%b = call i32 @llvm.bitreverse.i32(i32 %a0)
|
||||
%c = shl i32 %b, 7
|
||||
%d = call i32 @llvm.bitreverse.i32(i32 %c)
|
||||
ret i32 %d
|
||||
}
|
||||
|
||||
define i64 @test_bitreverse_shli_bitreverse_i64(i64 %a) nounwind {
|
||||
; X86-LABEL: test_bitreverse_shli_bitreverse_i64:
|
||||
; X86: # %bb.0:
|
||||
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
||||
; X86-NEXT: bswapl %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
|
||||
; X86-NEXT: shll $4, %ecx
|
||||
; X86-NEXT: shrl $4, %eax
|
||||
; X86-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
|
||||
; X86-NEXT: orl %ecx, %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $858993459, %ecx # imm = 0x33333333
|
||||
; X86-NEXT: shrl $2, %eax
|
||||
; X86-NEXT: andl $858993459, %eax # imm = 0x33333333
|
||||
; X86-NEXT: leal (%eax,%ecx,4), %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $357913941, %ecx # imm = 0x15555555
|
||||
; X86-NEXT: shrl %eax
|
||||
; X86-NEXT: andl $1431655765, %eax # imm = 0x55555555
|
||||
; X86-NEXT: leal (%eax,%ecx,2), %eax
|
||||
; X86-NEXT: addl %eax, %eax
|
||||
; X86-NEXT: bswapl %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $235867919, %ecx # imm = 0xE0F0F0F
|
||||
; X86-NEXT: shll $4, %ecx
|
||||
; X86-NEXT: shrl $4, %eax
|
||||
; X86-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
|
||||
; X86-NEXT: orl %ecx, %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $590558003, %ecx # imm = 0x23333333
|
||||
; X86-NEXT: shrl $2, %eax
|
||||
; X86-NEXT: andl $858993459, %eax # imm = 0x33333333
|
||||
; X86-NEXT: leal (%eax,%ecx,4), %eax
|
||||
; X86-NEXT: movl %eax, %ecx
|
||||
; X86-NEXT: andl $1431655765, %ecx # imm = 0x55555555
|
||||
; X86-NEXT: shrl %eax
|
||||
; X86-NEXT: andl $1431655765, %eax # imm = 0x55555555
|
||||
; X86-NEXT: leal (%eax,%ecx,2), %eax
|
||||
; X86-NEXT: xorl %edx, %edx
|
||||
; X86-NEXT: retl
|
||||
;
|
||||
; X64-LABEL: test_bitreverse_shli_bitreverse_i64:
|
||||
; X64: # %bb.0:
|
||||
; X64-NEXT: bswapq %rdi
|
||||
; X64-NEXT: movq %rdi, %rax
|
||||
; X64-NEXT: shrq $4, %rax
|
||||
; X64-NEXT: movabsq $1085102592571150095, %rcx # imm = 0xF0F0F0F0F0F0F0F
|
||||
; X64-NEXT: andq %rcx, %rax
|
||||
; X64-NEXT: andq %rcx, %rdi
|
||||
; X64-NEXT: shlq $4, %rdi
|
||||
; X64-NEXT: orq %rax, %rdi
|
||||
; X64-NEXT: movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
|
||||
; X64-NEXT: movq %rdi, %rcx
|
||||
; X64-NEXT: andq %rax, %rcx
|
||||
; X64-NEXT: shrq $2, %rdi
|
||||
; X64-NEXT: andq %rax, %rdi
|
||||
; X64-NEXT: leaq (%rdi,%rcx,4), %rax
|
||||
; X64-NEXT: movl %eax, %ecx
|
||||
; X64-NEXT: andl $357913941, %ecx # imm = 0x15555555
|
||||
; X64-NEXT: shrl %eax
|
||||
; X64-NEXT: andl $1431655765, %eax # imm = 0x55555555
|
||||
; X64-NEXT: leal (%rax,%rcx,2), %eax
|
||||
; X64-NEXT: shlq $33, %rax
|
||||
; X64-NEXT: bswapq %rax
|
||||
; X64-NEXT: movl %eax, %ecx
|
||||
; X64-NEXT: andl $235867919, %ecx # imm = 0xE0F0F0F
|
||||
; X64-NEXT: shlq $4, %rcx
|
||||
; X64-NEXT: shrq $4, %rax
|
||||
; X64-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
|
||||
; X64-NEXT: orq %rcx, %rax
|
||||
; X64-NEXT: movl %eax, %ecx
|
||||
; X64-NEXT: andl $590558003, %ecx # imm = 0x23333333
|
||||
; X64-NEXT: shrq $2, %rax
|
||||
; X64-NEXT: andl $858993459, %eax # imm = 0x33333333
|
||||
; X64-NEXT: leaq (%rax,%rcx,4), %rax
|
||||
; X64-NEXT: movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
|
||||
; X64-NEXT: movq %rax, %rdx
|
||||
; X64-NEXT: andq %rcx, %rdx
|
||||
; X64-NEXT: shrq %rax
|
||||
; X64-NEXT: andq %rcx, %rax
|
||||
; X64-NEXT: leaq (%rax,%rdx,2), %rax
|
||||
; X64-NEXT: retq
|
||||
%1 = call i64 @llvm.bitreverse.i64(i64 %a)
|
||||
%2 = shl i64 %1, 33
|
||||
%3 = call i64 @llvm.bitreverse.i64(i64 %2)
|
||||
ret i64 %3
|
||||
}
|
||||
|
||||
define <4 x i32> @test_demandedbits_bitreverse(<4 x i32> %a0) nounwind {
|
||||
; X86-LABEL: test_demandedbits_bitreverse:
|
||||
; X86: # %bb.0:
|
||||
|
|
|
|||
Loading…
Reference in New Issue