| ; 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 $16711680, %ecx # imm = 0xFF0000 |
| ; CHECK-NEXT: movl %eax, %edx |
| ; CHECK-NEXT: orl $-16777216, %edx # imm = 0xFF000000 |
| ; CHECK-NEXT: shll $8, %ecx |
| ; CHECK-NEXT: shrl $8, %edx |
| ; CHECK-NEXT: orl %ecx, %edx |
| ; CHECK-NEXT: bswapl %eax |
| ; CHECK-NEXT: shrl $16, %eax |
| ; CHECK-NEXT: orl %edx, %eax |
| ; CHECK-NEXT: retl |
| ; |
| ; CHECK64-LABEL: test1: |
| ; CHECK64: # %bb.0: |
| ; CHECK64-NEXT: movl %edi, %eax |
| ; CHECK64-NEXT: andl $16711680, %eax # imm = 0xFF0000 |
| ; CHECK64-NEXT: movl %edi, %ecx |
| ; CHECK64-NEXT: orl $-16777216, %ecx # imm = 0xFF000000 |
| ; CHECK64-NEXT: shll $8, %eax |
| ; CHECK64-NEXT: shrl $8, %ecx |
| ; CHECK64-NEXT: orl %eax, %ecx |
| ; CHECK64-NEXT: bswapl %edi |
| ; CHECK64-NEXT: shrl $16, %edi |
| ; CHECK64-NEXT: orl %ecx, %edi |
| ; CHECK64-NEXT: movl %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: leal (%rax,%rcx), %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 {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: movzwl {{[0-9]+}}(%esp), %eax |
| ; CHECK-NEXT: movw $3199, {{[0-9]+}}(%esp) # imm = 0xC7F |
| ; CHECK-NEXT: fldcw {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: movw %ax, {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: fistpl {{[0-9]+}}(%esp) |
| ; CHECK-NEXT: fldcw {{[0-9]+}}(%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 |
| } |