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319bbeecb8
This exposes a shortcoming for AArch64, and that is tracked by PR40881: https://bugs.llvm.org/show_bug.cgi?id=40881 Patch by: @RKSimon (Simon Pilgrim) Differential Revision: https://reviews.llvm.org/D58017
59 lines
1.7 KiB
LLVM
59 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86
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; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx | FileCheck %s --check-prefix=X64
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; These tests just check that the plumbing is in place for @llvm.bswap. The
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; actual output is massive at the moment as llvm.bswap is not yet legal.
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declare i32 @llvm.bswap.i32(i32) readnone
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declare i32 @llvm.bswap.v4i32(i32) readnone
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; fold (bswap undef) -> undef
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define i32 @test_undef() nounwind {
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; X86-LABEL: test_undef:
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; X86: # %bb.0:
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; X86-NEXT: retl
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;
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; X64-LABEL: test_undef:
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; X64: # %bb.0:
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; X64-NEXT: retq
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%b = call i32 @llvm.bswap.i32(i32 undef)
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ret i32 %b
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}
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; fold (bswap (bswap x)) -> x
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define i32 @test_bswap_bswap(i32 %a0) nounwind {
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; X86-LABEL: test_bswap_bswap:
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; X86: # %bb.0:
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; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X86-NEXT: retl
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;
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; X64-LABEL: test_bswap_bswap:
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; X64: # %bb.0:
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; X64-NEXT: movl %edi, %eax
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; X64-NEXT: retq
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%b = call i32 @llvm.bswap.i32(i32 %a0)
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%c = call i32 @llvm.bswap.i32(i32 %b)
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ret i32 %c
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}
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define i32 @test_demandedbits_bswap(i32 %a0) nounwind {
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; X86-LABEL: test_demandedbits_bswap:
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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: andl $-65536, %eax # imm = 0xFFFF0000
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; X86-NEXT: retl
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;
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; X64-LABEL: test_demandedbits_bswap:
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; X64: # %bb.0:
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; X64-NEXT: movl %edi, %eax
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; X64-NEXT: bswapl %eax
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; X64-NEXT: andl $-65536, %eax # imm = 0xFFFF0000
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; X64-NEXT: retq
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%b = or i32 %a0, 4278190080
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%c = call i32 @llvm.bswap.i32(i32 %b)
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%d = and i32 %c, 4294901760
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ret i32 %d
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}
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