| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc -mtriple=i686-unknown-linux-gnu < %s | FileCheck %s --check-prefix=X86 |
| ; RUN: llc -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s --check-prefix=X64 |
| |
| ; Fold |
| ; ~(X - 1) |
| ; To |
| ; - X |
| ; |
| ; This needs to be a backend-level fold because only by now pointers |
| ; are just registers; in middle-end IR this can only be done via @llvm.ptrmask() |
| ; intrinsic which is not sufficiently widely-spread yet. |
| ; |
| ; https://bugs.llvm.org/show_bug.cgi?id=44448 |
| |
| ; The basic positive tests |
| |
| define i32 @t0_32(i32 %alignment) nounwind { |
| ; X86-LABEL: t0_32: |
| ; X86: # %bb.0: |
| ; X86-NEXT: xorl %eax, %eax |
| ; X86-NEXT: subl {{[0-9]+}}(%esp), %eax |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: t0_32: |
| ; X64: # %bb.0: |
| ; X64-NEXT: movl %edi, %eax |
| ; X64-NEXT: negl %eax |
| ; X64-NEXT: retq |
| %mask = add i32 %alignment, -1 |
| %invmask = xor i32 %mask, -1 |
| ret i32 %invmask |
| } |
| define i64 @t1_64(i64 %alignment) nounwind { |
| ; X86-LABEL: t1_64: |
| ; X86: # %bb.0: |
| ; X86-NEXT: xorl %edx, %edx |
| ; X86-NEXT: xorl %eax, %eax |
| ; X86-NEXT: subl {{[0-9]+}}(%esp), %eax |
| ; X86-NEXT: sbbl {{[0-9]+}}(%esp), %edx |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: t1_64: |
| ; X64: # %bb.0: |
| ; X64-NEXT: movq %rdi, %rax |
| ; X64-NEXT: negq %rax |
| ; X64-NEXT: retq |
| %mask = add i64 %alignment, -1 |
| %invmask = xor i64 %mask, -1 |
| ret i64 %invmask |
| } |
| |
| ; Extra use test |
| |
| define i32 @t2_extrause(i32 %alignment, i32* %mask_storage) nounwind { |
| ; X86-LABEL: t2_extrause: |
| ; X86: # %bb.0: |
| ; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx |
| ; X86-NEXT: movl {{[0-9]+}}(%esp), %eax |
| ; X86-NEXT: leal -1(%eax), %edx |
| ; X86-NEXT: movl %edx, (%ecx) |
| ; X86-NEXT: negl %eax |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: t2_extrause: |
| ; X64: # %bb.0: |
| ; X64-NEXT: movl %edi, %eax |
| ; X64-NEXT: leal -1(%rax), %ecx |
| ; X64-NEXT: movl %ecx, (%rsi) |
| ; X64-NEXT: negl %eax |
| ; X64-NEXT: # kill: def $eax killed $eax killed $rax |
| ; X64-NEXT: retq |
| %mask = add i32 %alignment, -1 |
| store i32 %mask, i32* %mask_storage |
| %invmask = xor i32 %mask, -1 |
| ret i32 %invmask |
| } |
| |
| ; Negative tests |
| |
| define i32 @n3_not_dec(i32 %alignment) nounwind { |
| ; X86-LABEL: n3_not_dec: |
| ; X86: # %bb.0: |
| ; X86-NEXT: movl {{[0-9]+}}(%esp), %eax |
| ; X86-NEXT: incl %eax |
| ; X86-NEXT: notl %eax |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: n3_not_dec: |
| ; X64: # %bb.0: |
| ; X64-NEXT: # kill: def $edi killed $edi def $rdi |
| ; X64-NEXT: leal 1(%rdi), %eax |
| ; X64-NEXT: notl %eax |
| ; X64-NEXT: retq |
| %mask = add i32 %alignment, 1 ; not -1 |
| %invmask = xor i32 %mask, -1 |
| ret i32 %invmask |
| } |
| |
| define i32 @n4_not_not(i32 %alignment) nounwind { |
| ; X86-LABEL: n4_not_not: |
| ; X86: # %bb.0: |
| ; X86-NEXT: movl {{[0-9]+}}(%esp), %eax |
| ; X86-NEXT: decl %eax |
| ; X86-NEXT: xorl $1, %eax |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: n4_not_not: |
| ; X64: # %bb.0: |
| ; X64-NEXT: # kill: def $edi killed $edi def $rdi |
| ; X64-NEXT: leal -1(%rdi), %eax |
| ; X64-NEXT: xorl $1, %eax |
| ; X64-NEXT: retq |
| %mask = add i32 %alignment, -1 |
| %invmask = xor i32 %mask, 1 ; not -1 |
| ret i32 %invmask |
| } |