; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=CHECK64
; Check a few invalid patterns for halfword bswap pattern matching
; Don't match a near-miss 32-bit packed halfword bswap
; (with only half of the swap tree valid).
define i32 @test1(i32 %x) nounwind {
; CHECK-LABEL: test1:
; CHECK: # %bb.0:
; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
; CHECK-NEXT: movl %eax, %ecx
; CHECK-NEXT: andl $16711935, %ecx # imm = 0xFF00FF
; CHECK-NEXT: shll $8, %ecx
; CHECK-NEXT: orl $-16777216, %eax # imm = 0xFF000000
; CHECK-NEXT: shrl $8, %eax
; CHECK-NEXT: orl %ecx, %eax
; CHECK-NEXT: retl
;
; CHECK64-LABEL: test1:
; CHECK64: # %bb.0:
; CHECK64-NEXT: movl %edi, %eax
; CHECK64-NEXT: andl $16711935, %eax # imm = 0xFF00FF
; CHECK64-NEXT: shll $8, %eax
; CHECK64-NEXT: orl $-16777216, %edi # imm = 0xFF000000
; CHECK64-NEXT: shrl $8, %edi
; CHECK64-NEXT: orl %edi, %eax
; CHECK64-NEXT: retq
%byte0 = and i32 %x, 255 ; 0x000000ff
%byte1 = and i32 %x, 65280 ; 0x0000ff00
%byte2 = and i32 %x, 16711680 ; 0x00ff0000
%byte3 = or i32 %x, 4278190080 ; 0xff000000
%tmp0 = shl i32 %byte0, 8
%tmp1 = lshr i32 %byte1, 8
%tmp2 = shl i32 %byte2, 8
%tmp3 = lshr i32 %byte3, 8
%or0 = or i32 %tmp0, %tmp1
%or1 = or i32 %tmp2, %tmp3
%result = or i32 %or0, %or1
ret i32 %result
}
; Don't match a near-miss 32-bit packed halfword bswap
; (with swapped lshr/shl)
; ((x >> 8) & 0x0000ff00) |
; ((x << 8) & 0x000000ff) |
; ((x << 8) & 0xff000000) |
; ((x >> 8) & 0x00ff0000)
define i32 @test2(i32 %x) nounwind {
; CHECK-LABEL: test2:
; CHECK: # %bb.0:
; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
; CHECK-NEXT: movl %ecx, %eax
; CHECK-NEXT: shrl $8, %eax
; CHECK-NEXT: shll $8, %ecx
; CHECK-NEXT: movl %eax, %edx
; CHECK-NEXT: andl $65280, %edx # imm = 0xFF00
; CHECK-NEXT: andl $-16777216, %ecx # imm = 0xFF000000
; CHECK-NEXT: andl $16711680, %eax # imm = 0xFF0000
; CHECK-NEXT: orl %ecx, %eax
; CHECK-NEXT: orl %edx, %eax
; CHECK-NEXT: retl
;
; CHECK64-LABEL: test2:
; CHECK64: # %bb.0:
; CHECK64-NEXT: movl %edi, %eax
; CHECK64-NEXT: shrl $8, %eax
; CHECK64-NEXT: shll $8, %edi
; CHECK64-NEXT: movl %eax, %ecx
; CHECK64-NEXT: andl $65280, %ecx # imm = 0xFF00
; CHECK64-NEXT: andl $-16777216, %edi # imm = 0xFF000000
; CHECK64-NEXT: andl $16711680, %eax # imm = 0xFF0000
; CHECK64-NEXT: orl %edi, %eax
; CHECK64-NEXT: orl %ecx, %eax
; CHECK64-NEXT: retq
%byte1 = lshr i32 %x, 8
%byte0 = shl i32 %x, 8
%byte3 = shl i32 %x, 8
%byte2 = lshr i32 %x, 8
%tmp1 = and i32 %byte1, 65280 ; 0x0000ff00
%tmp0 = and i32 %byte0, 255 ; 0x000000ff
%tmp3 = and i32 %byte3, 4278190080 ; 0xff000000
%tmp2 = and i32 %byte2, 16711680 ; 0x00ff0000
%or0 = or i32 %tmp0, %tmp1
%or1 = or i32 %tmp2, %tmp3
%result = or i32 %or0, %or1
ret i32 %result
}
; Invalid pattern involving a unary op
define i32 @test3(float %x) nounwind {
; CHECK-LABEL: test3:
; CHECK: # %bb.0:
; CHECK-NEXT: subl $8, %esp
; CHECK-NEXT: flds {{[0-9]+}}(%esp)
; CHECK-NEXT: fnstcw (%esp)
; CHECK-NEXT: movzwl (%esp), %eax
; CHECK-NEXT: orl $3072, %eax # imm = 0xC00
; CHECK-NEXT: movw %ax, {{[0-9]+}}(%esp)
; CHECK-NEXT: fldcw {{[0-9]+}}(%esp)
; CHECK-NEXT: fistpl {{[0-9]+}}(%esp)
; CHECK-NEXT: fldcw (%esp)
; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
; CHECK-NEXT: movl %ecx, %edx
; CHECK-NEXT: shll $8, %edx
; CHECK-NEXT: movl %ecx, %eax
; CHECK-NEXT: shrl $8, %eax
; CHECK-NEXT: andl $65280, %ecx # imm = 0xFF00
; CHECK-NEXT: andl $-16777216, %edx # imm = 0xFF000000
; CHECK-NEXT: andl $16711680, %eax # imm = 0xFF0000
; CHECK-NEXT: orl %edx, %eax
; CHECK-NEXT: orl %ecx, %eax
; CHECK-NEXT: addl $8, %esp
; CHECK-NEXT: retl
;
; CHECK64-LABEL: test3:
; CHECK64: # %bb.0:
; CHECK64-NEXT: cvttss2si %xmm0, %ecx
; CHECK64-NEXT: movl %ecx, %edx
; CHECK64-NEXT: shll $8, %edx
; CHECK64-NEXT: movl %ecx, %eax
; CHECK64-NEXT: shrl $8, %eax
; CHECK64-NEXT: andl $65280, %ecx # imm = 0xFF00
; CHECK64-NEXT: andl $-16777216, %edx # imm = 0xFF000000
; CHECK64-NEXT: andl $16711680, %eax # imm = 0xFF0000
; CHECK64-NEXT: orl %edx, %eax
; CHECK64-NEXT: orl %ecx, %eax
; CHECK64-NEXT: retq
%integer = fptosi float %x to i32
%byte0 = shl i32 %integer, 8
%byte3 = shl i32 %integer, 8
%byte2 = lshr i32 %integer, 8
%tmp1 = and i32 %integer, 65280 ; 0x0000ff00
%tmp0 = and i32 %byte0, 255 ; 0x000000ff
%tmp3 = and i32 %byte3, 4278190080 ; 0xff000000
%tmp2 = and i32 %byte2, 16711680 ; 0x00ff0000
%or0 = or i32 %tmp0, %tmp1
%or1 = or i32 %tmp2, %tmp3
%result = or i32 %or0, %or1
ret i32 %result
}
Codebase Browser
llvm