79 lines
3.2 KiB
LLVM
79 lines
3.2 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs -mtriple=aarch64-linux-gnu -mattr=+aes -o - %s| FileCheck %s --check-prefixes=CHECK
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; User code intends to execute {pmull, pmull2} instructions on {lower, higher} half of the same vector registers directly.
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; Test that PMULL2 are generated for higher-half operands.
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; The suboptimal code generation fails to use higher-half contents in place; instead, it moves higher-lane contents to lower lane
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; to make use of PMULL everywhere, and generates unnecessary moves.
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define void @test1(ptr %0, ptr %1) {
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; CHECK-LABEL: test1:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #56824 // =0xddf8
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; CHECK-NEXT: mov w9, #61186 // =0xef02
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; CHECK-NEXT: movk w8, #40522, lsl #16
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; CHECK-NEXT: movk w9, #29710, lsl #16
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; CHECK-NEXT: ldp q0, q1, [x1]
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; CHECK-NEXT: dup v2.2d, x8
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; CHECK-NEXT: fmov d3, x9
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; CHECK-NEXT: pmull v4.1q, v0.1d, v3.1d
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; CHECK-NEXT: pmull v3.1q, v1.1d, v3.1d
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; CHECK-NEXT: pmull2 v0.1q, v0.2d, v2.2d
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; CHECK-NEXT: pmull2 v1.1q, v1.2d, v2.2d
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; CHECK-NEXT: eor v0.16b, v4.16b, v0.16b
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; CHECK-NEXT: eor v1.16b, v3.16b, v1.16b
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; CHECK-NEXT: stp q0, q1, [x1]
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; CHECK-NEXT: ret
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%3 = load <2 x i64>, ptr %1
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%4 = getelementptr inbounds <2 x i64>, ptr %1, i64 1
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%5 = load <2 x i64>, ptr %4
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%6 = extractelement <2 x i64> %3, i64 1
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%7 = tail call <16 x i8> @llvm.aarch64.neon.pmull64(i64 %6, i64 2655706616)
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%8 = extractelement <2 x i64> %5, i64 1
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%9 = tail call <16 x i8> @llvm.aarch64.neon.pmull64(i64 %8, i64 2655706616)
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%10 = load <2 x i64>, ptr %0
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%11 = getelementptr inbounds i8, ptr %0, i64 16
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%12 = load <2 x i64>, ptr %11
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%13 = extractelement <2 x i64> %3, i64 0
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%14 = tail call <16 x i8> @llvm.aarch64.neon.pmull64(i64 %13, i64 1947135746)
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%15 = extractelement <2 x i64> %5, i64 0
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%16 = tail call <16 x i8> @llvm.aarch64.neon.pmull64(i64 %15, i64 1947135746)
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%17 = xor <16 x i8> %14, %7
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%18 = xor <16 x i8> %16, %9
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store <16 x i8> %17, ptr %1
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store <16 x i8> %18, ptr %4
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ret void
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}
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; One operand is higher-half of SIMD register, and the other operand is lower-half of another SIMD register.
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; Tests that codegen doesn't generate unnecessary moves.
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define void @test2(ptr %0, <2 x i64> %1, <2 x i64> %2) {
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; CHECK-LABEL: test2:
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; CHECK: // %bb.0:
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; CHECK-NEXT: dup v1.2d, v1.d[0]
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; CHECK-NEXT: pmull2 v0.1q, v0.2d, v1.2d
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; CHECK-NEXT: str q0, [x0]
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; CHECK-NEXT: ret
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%4 = extractelement <2 x i64> %1, i64 1
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%5 = extractelement <2 x i64> %2, i64 0
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%6 = tail call <16 x i8> @llvm.aarch64.neon.pmull64(i64 %4, i64 %5)
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store <16 x i8> %6, ptr %0, align 16
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ret void
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}
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; Operand %4 is the higher-half of v2i64, and operand %2 is an input parameter of i64.
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; Test that %2 is duplicated into the proper lane of SIMD directly for optimal codegen.
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define void @test3(ptr %0, <2 x i64> %1, i64 %2) {
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; CHECK-LABEL: test3:
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; CHECK: // %bb.0:
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; CHECK-NEXT: dup v1.2d, x1
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; CHECK-NEXT: pmull2 v0.1q, v0.2d, v1.2d
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; CHECK-NEXT: str q0, [x0]
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; CHECK-NEXT: ret
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%4 = extractelement <2 x i64> %1, i64 1
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%5 = tail call <16 x i8> @llvm.aarch64.neon.pmull64(i64 %4, i64 %2)
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store <16 x i8> %5, ptr %0, align 16
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ret void
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}
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declare <16 x i8> @llvm.aarch64.neon.pmull64(i64, i64)
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