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Add tests for rotate with demanded bits. NFC 

llvm-svn: 373223
This commit is contained in:
Amaury Sechet 2019-09-30 16:26:09 +00:00
parent 8913882fa2
commit 09025ca6fc
1 changed files with 54 additions and 0 deletions
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54
llvm/test/CodeGen/X86/rot16.ll
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@ -177,3 +177,57 @@ define i16 @xbu(i16 %x, i16 %y, i16 %z) nounwind {
%t2 = or i16 %t0, %t1
ret i16 %t2
}
define i32 @rot16_demandedbits(i32 %x, i32 %y) nounwind {
; X32-LABEL: rot16_demandedbits:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl %eax, %ecx
; X32-NEXT: shrl $11, %ecx
; X32-NEXT: shll $5, %eax
; X32-NEXT: orl %ecx, %eax
; X32-NEXT: andl $65536, %eax # imm = 0x10000
; X32-NEXT: retl
;
; X64-LABEL: rot16_demandedbits:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: movl %edi, %ecx
; X64-NEXT: shrl $11, %ecx
; X64-NEXT: shll $5, %eax
; X64-NEXT: orl %ecx, %eax
; X64-NEXT: andl $65536, %eax # imm = 0x10000
; X64-NEXT: retq
%t0 = lshr i32 %x, 11
%t1 = shl i32 %x, 5
%t2 = or i32 %t0, %t1
%t3 = and i32 %t2, 65536
ret i32 %t3
}
define i16 @rot16_trunc(i32 %x, i32 %y) nounwind {
; X32-LABEL: rot16_trunc:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl %eax, %ecx
; X32-NEXT: shrl $11, %ecx
; X32-NEXT: shll $5, %eax
; X32-NEXT: orl %ecx, %eax
; X32-NEXT: # kill: def $ax killed $ax killed $eax
; X32-NEXT: retl
;
; X64-LABEL: rot16_trunc:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: movl %edi, %ecx
; X64-NEXT: shrl $11, %ecx
; X64-NEXT: shll $5, %eax
; X64-NEXT: orl %ecx, %eax
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
%t0 = lshr i32 %x, 11
%t1 = shl i32 %x, 5
%t2 = or i32 %t0, %t1
%t3 = trunc i32 %t2 to i16
ret i16 %t3
}