94a24e7a40
G_BSWAP is generated from llvm.bswap.<type> intrinsics, clang genrates these intrinsics from __builtin_bswap32 and __builtin_bswap64. Add lower and narrowscalar for G_BSWAP. Lower G_BSWAP on MIPS32, select G_BSWAP on MIPS32 revision 2 and later. Differential Revision: https://reviews.llvm.org/D71362
31 lines
871 B
YAML
31 lines
871 B
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=mipsel-linux-gnu -run-pass=instruction-select -mattr=+mips32r2 -verify-machineinstrs %s -o - | FileCheck %s -check-prefixes=MIPS32R2
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--- |
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define void @bswap_i32() { entry: ret void }
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...
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---
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name: bswap_i32
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alignment: 4
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legalized: true
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regBankSelected: true
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tracksRegLiveness: true
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body: |
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bb.1.entry:
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liveins: $a0
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; MIPS32R2-LABEL: name: bswap_i32
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; MIPS32R2: liveins: $a0
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; MIPS32R2: [[COPY:%[0-9]+]]:gpr32 = COPY $a0
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; MIPS32R2: [[WSBH:%[0-9]+]]:gpr32 = WSBH [[COPY]]
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; MIPS32R2: [[ROTR:%[0-9]+]]:gpr32 = ROTR [[WSBH]], 16
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; MIPS32R2: $v0 = COPY [[ROTR]]
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; MIPS32R2: RetRA implicit $v0
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%0:gprb(s32) = COPY $a0
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%1:gprb(s32) = G_BSWAP %0
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$v0 = COPY %1(s32)
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RetRA implicit $v0
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...
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