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[x86] add tests for bswap/rotate; NFC

This commit is contained in:
Sanjay Patel 2020-07-13 11:23:45 -04:00
parent 8f7d3430b7
commit 69fff1fc49
1 changed files with 70 additions and 2 deletions
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72
llvm/test/CodeGen/X86/rot16.ll
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@ -1,6 +1,8 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s --check-prefix=X32
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=X64
; RUN: llc < %s -mtriple=i686-- | FileCheck %s --check-prefixes=X32,BASE32
; RUN: llc < %s -mtriple=i686-- -mattr=movbe | FileCheck %s --check-prefixes=X32,MOVBE32
; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s --check-prefixes=X64,BASE64
; RUN: llc < %s -mtriple=x86_64-- -mattr=movbe | FileCheck %s --check-prefixes=X64,MOVBE64
define i16 @foo(i16 %x, i16 %y, i16 %z) nounwind {
; X32-LABEL: foo:
@ -230,3 +232,69 @@ define i16 @rot16_trunc(i32 %x, i32 %y) nounwind {
%t3 = trunc i32 %t2 to i16
ret i16 %t3
}
define i16 @rotate16(i16 %x) {
; X32-LABEL: rotate16:
; X32: # %bb.0:
; X32-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X32-NEXT: rolw $8, %ax
; X32-NEXT: retl
;
; X64-LABEL: rotate16:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: rolw $8, %ax
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
%r = call i16 @llvm.fshl.i16(i16 %x, i16 %x, i16 8)
ret i16 %r
}
define void @rotate16_in_place_memory(i8* %p) {
; X32-LABEL: rotate16_in_place_memory:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: rolw $8, (%eax)
; X32-NEXT: retl
;
; X64-LABEL: rotate16_in_place_memory:
; X64: # %bb.0:
; X64-NEXT: rolw $8, (%rdi)
; X64-NEXT: retq
%p0 = getelementptr i8, i8* %p, i64 0
%p1 = getelementptr i8, i8* %p, i64 1
%i0 = load i8, i8* %p0, align 1
%i1 = load i8, i8* %p1, align 1
store i8 %i1, i8* %p0, align 1
store i8 %i0, i8* %p1, align 1
ret void
}
define void @rotate16_memory(i8* %p, i8* %q) {
; X32-LABEL: rotate16_memory:
; X32: # %bb.0:
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: movzwl (%ecx), %ecx
; X32-NEXT: rolw $8, %cx
; X32-NEXT: movw %cx, (%eax)
; X32-NEXT: retl
;
; X64-LABEL: rotate16_memory:
; X64: # %bb.0:
; X64-NEXT: movzwl (%rdi), %eax
; X64-NEXT: rolw $8, %ax
; X64-NEXT: movw %ax, (%rsi)
; X64-NEXT: retq
%p0 = getelementptr i8, i8* %p, i64 0
%p1 = getelementptr i8, i8* %p, i64 1
%q0 = getelementptr i8, i8* %q, i64 0
%q1 = getelementptr i8, i8* %q, i64 1
%i0 = load i8, i8* %p0, align 1
%i1 = load i8, i8* %p1, align 1
store i8 %i1, i8* %q0, align 1
store i8 %i0, i8* %q1, align 1
ret void
}
declare i16 @llvm.fshl.i16(i16, i16, i16)