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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx | FileCheck %s --check-prefix=X64
; These tests just check that the plumbing is in place for @llvm.bswap. The
; actual output is massive at the moment as llvm.bswap is not yet legal.
declare i32 @llvm.bswap.i32(i32) readnone
declare i32 @llvm.bswap.v4i32(i32) readnone
; fold (bswap undef) -> undef
define i32 @test_undef() nounwind {
; X86-LABEL: test_undef:
; X86: # %bb.0:
; X86-NEXT: retl
;
; X64-LABEL: test_undef:
; X64: # %bb.0:
; X64-NEXT: retq
%b = call i32 @llvm.bswap.i32(i32 undef)
ret i32 %b
}
; fold (bswap (bswap x)) -> x
define i32 @test_bswap_bswap(i32 %a0) nounwind {
; X86-LABEL: test_bswap_bswap:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: retl
;
; X64-LABEL: test_bswap_bswap:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: retq
%b = call i32 @llvm.bswap.i32(i32 %a0)
%c = call i32 @llvm.bswap.i32(i32 %b)
ret i32 %c
}
define i32 @test_demandedbits_bswap(i32 %a0) nounwind {
; X86-LABEL: test_demandedbits_bswap:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: bswapl %eax
; X86-NEXT: andl $-65536, %eax # imm = 0xFFFF0000
; X86-NEXT: retl
;
; X64-LABEL: test_demandedbits_bswap:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: bswapl %eax
; X64-NEXT: andl $-65536, %eax # imm = 0xFFFF0000
; X64-NEXT: retq
%b = or i32 %a0, 4278190080
%c = call i32 @llvm.bswap.i32(i32 %b)
%d = and i32 %c, 4294901760
ret i32 %d
}
define void @demand_one_loaded_byte(i64* %xp, i32* %yp) {
; X86-LABEL: demand_one_loaded_byte:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movb 4(%ecx), %cl
; X86-NEXT: movb %cl, (%eax)
; X86-NEXT: retl
;
; X64-LABEL: demand_one_loaded_byte:
; X64: # %bb.0:
; X64-NEXT: movb 4(%rdi), %al
; X64-NEXT: movb %al, (%rsi)
; X64-NEXT: retq
%x = load i64, i64* %xp, align 8
%x_zzzz7654 = lshr i64 %x, 32
%x_z7654zzz = shl nuw nsw i64 %x_zzzz7654, 24
%x_4zzz = trunc i64 %x_z7654zzz to i32
%y = load i32, i32* %yp, align 4
%y_321z = and i32 %y, -256
%x_zzz4 = call i32 @llvm.bswap.i32(i32 %x_4zzz)
%r = or i32 %x_zzz4, %y_321z
store i32 %r, i32* %yp, align 4
ret void
}
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