diff options
Diffstat (limited to 'test/CodeGen/X86/bswap_tree2.ll')
| -rw-r--r-- | test/CodeGen/X86/bswap_tree2.ll | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/test/CodeGen/X86/bswap_tree2.ll b/test/CodeGen/X86/bswap_tree2.ll new file mode 100644 index 000000000000..a9c74df9d0d9 --- /dev/null +++ b/test/CodeGen/X86/bswap_tree2.ll @@ -0,0 +1,150 @@ +; 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), %ecx +; CHECK-NEXT: movl %ecx, %edx +; CHECK-NEXT: andl $16711680, %edx # imm = 0xFF0000 +; CHECK-NEXT: movl %ecx, %eax +; CHECK-NEXT: orl $-16777216, %eax # imm = 0xFF000000 +; CHECK-NEXT: shll $8, %edx +; CHECK-NEXT: shrl $8, %eax +; CHECK-NEXT: bswapl %ecx +; CHECK-NEXT: shrl $16, %ecx +; CHECK-NEXT: orl %edx, %eax +; CHECK-NEXT: orl %ecx, %eax +; CHECK-NEXT: retl +; +; CHECK64-LABEL: test1: +; CHECK64: # BB#0: +; CHECK64-NEXT: movl %edi, %ecx +; CHECK64-NEXT: andl $16711680, %ecx # imm = 0xFF0000 +; CHECK64-NEXT: movl %edi, %eax +; CHECK64-NEXT: orl $-16777216, %eax # imm = 0xFF000000 +; CHECK64-NEXT: shll $8, %ecx +; CHECK64-NEXT: shrl $8, %eax +; CHECK64-NEXT: bswapl %edi +; CHECK64-NEXT: shrl $16, %edi +; CHECK64-NEXT: orl %ecx, %eax +; 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: 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 +} |