; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5 ; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+cmov,+sse2,+bmi | FileCheck %s --check-prefixes=X86 ; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+cmov,+sse2,+bmi,+bmi2 | FileCheck %s --check-prefixes=X86 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+bmi | FileCheck %s --check-prefixes=X64 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+bmi,+bmi2 | FileCheck %s --check-prefixes=X64 ; PR131587 define i32 @and_select_neg_to_blsi1(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_neg_to_blsi1: ; X86: # %bb.0: ; X86-NEXT: blsil %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_neg_to_blsi1: ; X64: # %bb.0: ; X64-NEXT: blsil %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovel %esi, %eax ; X64-NEXT: retq %sub = sub i32 0, %a1 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %a1, %bls ret i32 %ret } ; PR131587 define i32 @and_select_neg_to_blsi2(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_neg_to_blsi2: ; X86: # %bb.0: ; X86-NEXT: blsil %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_neg_to_blsi2: ; X64: # %bb.0: ; X64-NEXT: blsil %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovel %esi, %eax ; X64-NEXT: retq %sub = sub i32 0, %a1 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %bls, %a1 ret i32 %ret } ; PR131587 define i32 @and_select_neg_to_blsi3(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_neg_to_blsi3: ; X86: # %bb.0: ; X86-NEXT: blsil %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_neg_to_blsi3: ; X64: # %bb.0: ; X64-NEXT: blsil %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %esi, %eax ; X64-NEXT: retq %sub = sub i32 0, %a1 %bls = select i1 %a0, i32 -1, i32 %sub %ret = and i32 %a1, %bls ret i32 %ret } ; PR131587 define i64 @and_select_neg_to_blsi_i64(i1 %a0, i64 %a1) nounwind { ; X86-LABEL: and_select_neg_to_blsi_i64: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: movl {{[0-9]+}}(%esp), %esi ; X86-NEXT: xorl %edx, %edx ; X86-NEXT: movl %ecx, %eax ; X86-NEXT: negl %eax ; X86-NEXT: sbbl %esi, %edx ; X86-NEXT: andl %esi, %edx ; X86-NEXT: andl %ecx, %eax ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %esi, %edx ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: and_select_neg_to_blsi_i64: ; X64: # %bb.0: ; X64-NEXT: blsiq %rsi, %rax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmoveq %rsi, %rax ; X64-NEXT: retq %sub = sub i64 0, %a1 %bls = select i1 %a0, i64 %sub, i64 -1 %ret = and i64 %a1, %bls ret i64 %ret } ; The transformation also applies to the following test although we do not emit a BLSI instruction ; here because the negation instruction is used more than once. define i32 @and_neg_select_pos_i32(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_neg_select_pos_i32: ; X86: # %bb.0: ; X86-NEXT: movl %eax, %ecx ; X86-NEXT: negl %ecx ; X86-NEXT: andl %ecx, %eax ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_neg_select_pos_i32: ; X64: # %bb.0: ; X64-NEXT: movl %esi, %eax ; X64-NEXT: negl %eax ; X64-NEXT: andl %eax, %esi ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %esi, %eax ; X64-NEXT: retq %sub = sub i32 0, %a1 %bls = select i1 %a0, i32 %a1, i32 -1 %ret = and i32 %sub, %bls ret i32 %ret } ; Negative test define i16 @and_select_neg_i16(i1 %a0, i16 %a1) nounwind { ; X86-LABEL: and_select_neg_i16: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: andb $1, %cl ; X86-NEXT: movl {{[0-9]+}}(%esp), %edx ; X86-NEXT: movl %edx, %esi ; X86-NEXT: negl %esi ; X86-NEXT: xorl %eax, %eax ; X86-NEXT: cmpb $1, %cl ; X86-NEXT: sbbl %eax, %eax ; X86-NEXT: orl %esi, %eax ; X86-NEXT: andl %edx, %eax ; X86-NEXT: # kill: def $ax killed $ax killed $eax ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: and_select_neg_i16: ; X64: # %bb.0: ; X64-NEXT: andb $1, %dil ; X64-NEXT: movl %esi, %ecx ; X64-NEXT: negl %ecx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: cmpb $1, %dil ; X64-NEXT: sbbl %eax, %eax ; X64-NEXT: orl %ecx, %eax ; X64-NEXT: andl %esi, %eax ; X64-NEXT: # kill: def $ax killed $ax killed $eax ; X64-NEXT: retq %sub = sub i16 0, %a1 %bls = select i1 %a0, i16 %sub, i16 -1 %ret = and i16 %a1, %bls ret i16 %ret } ; Negative test define <4 x i32> @and_select_neg_v4xi32(i1 %a0, <4 x i32> %a1) nounwind { ; X86-LABEL: and_select_neg_v4xi32: ; X86: # %bb.0: ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: jne .LBB6_1 ; X86-NEXT: # %bb.2: ; X86-NEXT: pcmpeqd %xmm1, %xmm1 ; X86-NEXT: pand %xmm1, %xmm0 ; X86-NEXT: retl ; X86-NEXT: .LBB6_1: ; X86-NEXT: pxor %xmm1, %xmm1 ; X86-NEXT: psubd %xmm0, %xmm1 ; X86-NEXT: pand %xmm1, %xmm0 ; X86-NEXT: retl ; ; X64-LABEL: and_select_neg_v4xi32: ; X64: # %bb.0: ; X64-NEXT: testb $1, %dil ; X64-NEXT: jne .LBB6_1 ; X64-NEXT: # %bb.2: ; X64-NEXT: pcmpeqd %xmm1, %xmm1 ; X64-NEXT: pand %xmm1, %xmm0 ; X64-NEXT: retq ; X64-NEXT: .LBB6_1: ; X64-NEXT: pxor %xmm1, %xmm1 ; X64-NEXT: psubd %xmm0, %xmm1 ; X64-NEXT: pand %xmm1, %xmm0 ; X64-NEXT: retq %sub = sub <4 x i32> zeroinitializer, %a1 %bls = select i1 %a0, <4 x i32> %sub, <4 x i32> %ret = and <4 x i32> %a1, %bls ret <4 x i32> %ret } ; Negative test define i32 @and_select_no_neg(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_no_neg: ; X86: # %bb.0: ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: andb $1, %cl ; X86-NEXT: xorl %edx, %edx ; X86-NEXT: cmpb $1, %cl ; X86-NEXT: sbbl %edx, %edx ; X86-NEXT: orl %eax, %edx ; X86-NEXT: andl %edx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_no_neg: ; X64: # %bb.0: ; X64-NEXT: andb $1, %dil ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: cmpb $1, %dil ; X64-NEXT: sbbl %eax, %eax ; X64-NEXT: orl %esi, %eax ; X64-NEXT: andl %esi, %eax ; X64-NEXT: retq %sub = sub i32 %a1, 0 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %a1, %bls ret i32 %ret } ; Negative test define i32 @and_select_neg_wrong_const(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_neg_wrong_const: ; X86: # %bb.0: ; X86-NEXT: movl %eax, %ecx ; X86-NEXT: negl %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: movl $1, %edx ; X86-NEXT: cmovnel %ecx, %edx ; X86-NEXT: andl %edx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_neg_wrong_const: ; X64: # %bb.0: ; X64-NEXT: movl %esi, %ecx ; X64-NEXT: negl %ecx ; X64-NEXT: testb $1, %dil ; X64-NEXT: movl $1, %eax ; X64-NEXT: cmovnel %ecx, %eax ; X64-NEXT: andl %esi, %eax ; X64-NEXT: retq %sub = sub i32 0, %a1 %bls = select i1 %a0, i32 %sub, i32 1 %ret = and i32 %a1, %bls ret i32 %ret } ; Negative test define i32 @and_select_neg_different_op(i1 %a0, i32 inreg %a1, i32 inreg %a2) nounwind { ; X86-LABEL: and_select_neg_different_op: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: andb $1, %cl ; X86-NEXT: negl %edx ; X86-NEXT: xorl %esi, %esi ; X86-NEXT: cmpb $1, %cl ; X86-NEXT: sbbl %esi, %esi ; X86-NEXT: orl %edx, %esi ; X86-NEXT: andl %esi, %eax ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: and_select_neg_different_op: ; X64: # %bb.0: ; X64-NEXT: andb $1, %dil ; X64-NEXT: negl %edx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: cmpb $1, %dil ; X64-NEXT: sbbl %eax, %eax ; X64-NEXT: orl %edx, %eax ; X64-NEXT: andl %esi, %eax ; X64-NEXT: retq %sub = sub i32 0, %a2 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %a1, %bls ret i32 %ret } ; PR133848 define i32 @and_select_sub_1_to_blsr1(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_sub_1_to_blsr1: ; X86: # %bb.0: ; X86-NEXT: blsrl %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_to_blsr1: ; X64: # %bb.0: ; X64-NEXT: blsrl %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovel %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %a1, %bls ret i32 %ret } ; PR133848 define i32 @and_select_sub_1_to_blsr2(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_sub_1_to_blsr2: ; X86: # %bb.0: ; X86-NEXT: blsrl %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_to_blsr2: ; X64: # %bb.0: ; X64-NEXT: blsrl %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovel %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %bls, %a1 ret i32 %ret } ; PR133848 define i32 @and_select_sub_1_to_blsr3(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_sub_1_to_blsr3: ; X86: # %bb.0: ; X86-NEXT: blsrl %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_to_blsr3: ; X64: # %bb.0: ; X64-NEXT: blsrl %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 -1, i32 %sub %ret = and i32 %a1, %bls ret i32 %ret } ; PR133848 define i32 @and_select_sub_1_to_blsr4(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_sub_1_to_blsr4: ; X86: # %bb.0: ; X86-NEXT: blsrl %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_to_blsr4: ; X64: # %bb.0: ; X64-NEXT: blsrl %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovel %esi, %eax ; X64-NEXT: retq %sub = sub i32 %a1, 1 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %a1, %bls ret i32 %ret } ; The transformation also applies to the following test although we do not emit a BLSR instruction ; here because the subtraction instruction is used more than once. define i32 @and_sub_1_select_orig(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_sub_1_select_orig: ; X86: # %bb.0: ; X86-NEXT: leal -1(%eax), %ecx ; X86-NEXT: andl %ecx, %eax ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_sub_1_select_orig: ; X64: # %bb.0: ; X64-NEXT: # kill: def $esi killed $esi def $rsi ; X64-NEXT: leal -1(%rsi), %eax ; X64-NEXT: andl %eax, %esi ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 %a1, i32 -1 %ret = and i32 %sub, %bls ret i32 %ret } ; PR133848 define i64 @and_select_sub_1_to_blsr_i64(i1 %a0, i64 %a1) nounwind { ; X86-LABEL: and_select_sub_1_to_blsr_i64: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: movl {{[0-9]+}}(%esp), %esi ; X86-NEXT: movl %ecx, %eax ; X86-NEXT: addl $-1, %eax ; X86-NEXT: movl %esi, %edx ; X86-NEXT: adcl $-1, %edx ; X86-NEXT: andl %esi, %edx ; X86-NEXT: andl %ecx, %eax ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: cmovel %esi, %edx ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_to_blsr_i64: ; X64: # %bb.0: ; X64-NEXT: blsrq %rsi, %rax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmoveq %rsi, %rax ; X64-NEXT: retq %sub = add i64 %a1, -1 %bls = select i1 %a0, i64 %sub, i64 -1 %ret = and i64 %a1, %bls ret i64 %ret } ; Negative test define i16 @and_select_sub_1_i16(i1 %a0, i16 %a1) nounwind { ; X86-LABEL: and_select_sub_1_i16: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: andb $1, %cl ; X86-NEXT: movl {{[0-9]+}}(%esp), %edx ; X86-NEXT: leal -1(%edx), %esi ; X86-NEXT: xorl %eax, %eax ; X86-NEXT: cmpb $1, %cl ; X86-NEXT: sbbl %eax, %eax ; X86-NEXT: orl %esi, %eax ; X86-NEXT: andl %edx, %eax ; X86-NEXT: # kill: def $ax killed $ax killed $eax ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_i16: ; X64: # %bb.0: ; X64-NEXT: # kill: def $esi killed $esi def $rsi ; X64-NEXT: andb $1, %dil ; X64-NEXT: leal -1(%rsi), %ecx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: cmpb $1, %dil ; X64-NEXT: sbbl %eax, %eax ; X64-NEXT: orl %ecx, %eax ; X64-NEXT: andl %esi, %eax ; X64-NEXT: # kill: def $ax killed $ax killed $eax ; X64-NEXT: retq %sub = add i16 %a1, -1 %bls = select i1 %a0, i16 %sub, i16 -1 %ret = and i16 %a1, %bls ret i16 %ret } ; Negative test define <4 x i32> @and_select_sub_1_v4xi32(i1 %a0, <4 x i32> %a1) nounwind { ; X86-LABEL: and_select_sub_1_v4xi32: ; X86: # %bb.0: ; X86-NEXT: pcmpeqd %xmm1, %xmm1 ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: je .LBB17_2 ; X86-NEXT: # %bb.1: ; X86-NEXT: paddd %xmm0, %xmm1 ; X86-NEXT: .LBB17_2: ; X86-NEXT: pand %xmm1, %xmm0 ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_v4xi32: ; X64: # %bb.0: ; X64-NEXT: pcmpeqd %xmm1, %xmm1 ; X64-NEXT: testb $1, %dil ; X64-NEXT: je .LBB17_2 ; X64-NEXT: # %bb.1: ; X64-NEXT: paddd %xmm0, %xmm1 ; X64-NEXT: .LBB17_2: ; X64-NEXT: pand %xmm1, %xmm0 ; X64-NEXT: retq %sub = add <4 x i32> %a1, %bls = select i1 %a0, <4 x i32> %sub, <4 x i32> %ret = and <4 x i32> %a1, %bls ret <4 x i32> %ret } ; Negative test define i32 @and_select_no_sub_1(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_no_sub_1: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: andb $1, %cl ; X86-NEXT: leal -2(%eax), %edx ; X86-NEXT: xorl %esi, %esi ; X86-NEXT: cmpb $1, %cl ; X86-NEXT: sbbl %esi, %esi ; X86-NEXT: orl %edx, %esi ; X86-NEXT: andl %esi, %eax ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: and_select_no_sub_1: ; X64: # %bb.0: ; X64-NEXT: # kill: def $esi killed $esi def $rsi ; X64-NEXT: andb $1, %dil ; X64-NEXT: leal -2(%rsi), %ecx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: cmpb $1, %dil ; X64-NEXT: sbbl %eax, %eax ; X64-NEXT: orl %ecx, %eax ; X64-NEXT: andl %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -2 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %a1, %bls ret i32 %ret } ; Negative test define i32 @and_select_sub_1_wrong_const(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: and_select_sub_1_wrong_const: ; X86: # %bb.0: ; X86-NEXT: leal -1(%eax), %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: movl $1, %edx ; X86-NEXT: cmovnel %ecx, %edx ; X86-NEXT: andl %edx, %eax ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_wrong_const: ; X64: # %bb.0: ; X64-NEXT: # kill: def $esi killed $esi def $rsi ; X64-NEXT: leal -1(%rsi), %ecx ; X64-NEXT: testb $1, %dil ; X64-NEXT: movl $1, %eax ; X64-NEXT: cmovnel %ecx, %eax ; X64-NEXT: andl %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 %sub, i32 1 %ret = and i32 %a1, %bls ret i32 %ret } ; Negative test define i32 @and_select_sub_1_different_op(i1 %a0, i32 inreg %a1, i32 inreg %a2) nounwind { ; X86-LABEL: and_select_sub_1_different_op: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: andb $1, %cl ; X86-NEXT: decl %edx ; X86-NEXT: xorl %esi, %esi ; X86-NEXT: cmpb $1, %cl ; X86-NEXT: sbbl %esi, %esi ; X86-NEXT: orl %edx, %esi ; X86-NEXT: andl %esi, %eax ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: and_select_sub_1_different_op: ; X64: # %bb.0: ; X64-NEXT: # kill: def $edx killed $edx def $rdx ; X64-NEXT: andb $1, %dil ; X64-NEXT: leal -1(%rdx), %ecx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: cmpb $1, %dil ; X64-NEXT: sbbl %eax, %eax ; X64-NEXT: orl %ecx, %eax ; X64-NEXT: andl %esi, %eax ; X64-NEXT: retq %sub = add i32 %a2, -1 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = and i32 %a1, %bls ret i32 %ret } define i32 @xor_select_sub_1_to_blsmsk1(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: xor_select_sub_1_to_blsmsk1: ; X86: # %bb.0: ; X86-NEXT: blsmskl %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_to_blsmsk1: ; X64: # %bb.0: ; X64-NEXT: blsmskl %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovel %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 %sub, i32 0 %ret = xor i32 %a1, %bls ret i32 %ret } define i32 @xor_select_sub_1_to_blsmsk2(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: xor_select_sub_1_to_blsmsk2: ; X86: # %bb.0: ; X86-NEXT: blsmskl %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_to_blsmsk2: ; X64: # %bb.0: ; X64-NEXT: blsmskl %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovel %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 %sub, i32 0 %ret = xor i32 %bls, %a1 ret i32 %ret } define i32 @xor_select_sub_1_to_blsmsk3(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: xor_select_sub_1_to_blsmsk3: ; X86: # %bb.0: ; X86-NEXT: blsmskl %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_to_blsmsk3: ; X64: # %bb.0: ; X64-NEXT: blsmskl %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 0, i32 %sub %ret = xor i32 %a1, %bls ret i32 %ret } define i32 @xor_select_sub_1_to_blsmsk4(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: xor_select_sub_1_to_blsmsk4: ; X86: # %bb.0: ; X86-NEXT: blsmskl %eax, %ecx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_to_blsmsk4: ; X64: # %bb.0: ; X64-NEXT: blsmskl %esi, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovel %esi, %eax ; X64-NEXT: retq %sub = sub i32 %a1, 1 %bls = select i1 %a0, i32 %sub, i32 0 %ret = xor i32 %a1, %bls ret i32 %ret } ; The transformation also applies to the following test although we do not emit a BLSMSK instruction ; here because the subtraction instruction is used more than once. define i32 @xor_sub_1_select_orig(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: xor_sub_1_select_orig: ; X86: # %bb.0: ; X86-NEXT: leal -1(%eax), %ecx ; X86-NEXT: xorl %ecx, %eax ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: retl ; ; X64-LABEL: xor_sub_1_select_orig: ; X64: # %bb.0: ; X64-NEXT: # kill: def $esi killed $esi def $rsi ; X64-NEXT: leal -1(%rsi), %eax ; X64-NEXT: xorl %eax, %esi ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 %a1, i32 0 %ret = xor i32 %sub, %bls ret i32 %ret } define i64 @xor_select_sub_1_to_blsmsk_i64(i1 %a0, i64 %a1) nounwind { ; X86-LABEL: xor_select_sub_1_to_blsmsk_i64: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: movl {{[0-9]+}}(%esp), %esi ; X86-NEXT: movl %ecx, %eax ; X86-NEXT: addl $-1, %eax ; X86-NEXT: movl %esi, %edx ; X86-NEXT: adcl $-1, %edx ; X86-NEXT: xorl %esi, %edx ; X86-NEXT: xorl %ecx, %eax ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovel %ecx, %eax ; X86-NEXT: cmovel %esi, %edx ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_to_blsmsk_i64: ; X64: # %bb.0: ; X64-NEXT: blsmskq %rsi, %rax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmoveq %rsi, %rax ; X64-NEXT: retq %sub = add i64 %a1, -1 %bls = select i1 %a0, i64 %sub, i64 0 %ret = xor i64 %a1, %bls ret i64 %ret } ; Negative test define i16 @xor_select_sub_1_i16(i1 %a0, i16 %a1) nounwind { ; X86-LABEL: xor_select_sub_1_i16: ; X86: # %bb.0: ; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: leal -1(%ecx), %edx ; X86-NEXT: xorl %eax, %eax ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %edx, %eax ; X86-NEXT: xorl %ecx, %eax ; X86-NEXT: # kill: def $ax killed $ax killed $eax ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_i16: ; X64: # %bb.0: ; X64-NEXT: # kill: def $esi killed $esi def $rsi ; X64-NEXT: leal -1(%rsi), %ecx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %ecx, %eax ; X64-NEXT: xorl %esi, %eax ; X64-NEXT: # kill: def $ax killed $ax killed $eax ; X64-NEXT: retq %sub = add i16 %a1, -1 %bls = select i1 %a0, i16 %sub, i16 0 %ret = xor i16 %a1, %bls ret i16 %ret } ; Negative test define <4 x i32> @xor_select_sub_1_v4xi32(i1 %a0, <4 x i32> %a1) nounwind { ; X86-LABEL: xor_select_sub_1_v4xi32: ; X86: # %bb.0: ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: jne .LBB28_1 ; X86-NEXT: # %bb.2: ; X86-NEXT: xorps %xmm1, %xmm1 ; X86-NEXT: xorps %xmm1, %xmm0 ; X86-NEXT: retl ; X86-NEXT: .LBB28_1: ; X86-NEXT: pcmpeqd %xmm1, %xmm1 ; X86-NEXT: paddd %xmm0, %xmm1 ; X86-NEXT: pxor %xmm1, %xmm0 ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_v4xi32: ; X64: # %bb.0: ; X64-NEXT: testb $1, %dil ; X64-NEXT: jne .LBB28_1 ; X64-NEXT: # %bb.2: ; X64-NEXT: xorps %xmm1, %xmm1 ; X64-NEXT: xorps %xmm1, %xmm0 ; X64-NEXT: retq ; X64-NEXT: .LBB28_1: ; X64-NEXT: pcmpeqd %xmm1, %xmm1 ; X64-NEXT: paddd %xmm0, %xmm1 ; X64-NEXT: pxor %xmm1, %xmm0 ; X64-NEXT: retq %sub = add <4 x i32> %a1, %bls = select i1 %a0, <4 x i32> %sub, <4 x i32> zeroinitializer %ret = xor <4 x i32> %a1, %bls ret <4 x i32> %ret } ; Negative test define i32 @xor_select_no_sub_1(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: xor_select_no_sub_1: ; X86: # %bb.0: ; X86-NEXT: leal 1(%eax), %ecx ; X86-NEXT: xorl %edx, %edx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %edx ; X86-NEXT: xorl %edx, %eax ; X86-NEXT: retl ; ; X64-LABEL: xor_select_no_sub_1: ; X64: # %bb.0: ; X64-NEXT: # kill: def $esi killed $esi def $rsi ; X64-NEXT: leal 1(%rsi), %ecx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %ecx, %eax ; X64-NEXT: xorl %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, 1 %bls = select i1 %a0, i32 %sub, i32 0 %ret = xor i32 %a1, %bls ret i32 %ret } ; Negative test define i32 @xor_select_sub_1_wrong_const(i1 %a0, i32 inreg %a1) nounwind { ; X86-LABEL: xor_select_sub_1_wrong_const: ; X86: # %bb.0: ; X86-NEXT: pushl %esi ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx ; X86-NEXT: andb $1, %cl ; X86-NEXT: leal -1(%eax), %edx ; X86-NEXT: xorl %esi, %esi ; X86-NEXT: cmpb $1, %cl ; X86-NEXT: sbbl %esi, %esi ; X86-NEXT: orl %edx, %esi ; X86-NEXT: xorl %esi, %eax ; X86-NEXT: popl %esi ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_wrong_const: ; X64: # %bb.0: ; X64-NEXT: # kill: def $esi killed $esi def $rsi ; X64-NEXT: andb $1, %dil ; X64-NEXT: leal -1(%rsi), %ecx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: cmpb $1, %dil ; X64-NEXT: sbbl %eax, %eax ; X64-NEXT: orl %ecx, %eax ; X64-NEXT: xorl %esi, %eax ; X64-NEXT: retq %sub = add i32 %a1, -1 %bls = select i1 %a0, i32 %sub, i32 -1 %ret = xor i32 %a1, %bls ret i32 %ret } ; Negative test define i32 @xor_select_sub_1_different_op(i1 %a0, i32 inreg %a1, i32 inreg %a2) nounwind { ; X86-LABEL: xor_select_sub_1_different_op: ; X86: # %bb.0: ; X86-NEXT: leal -1(%edx), %ecx ; X86-NEXT: xorl %edx, %edx ; X86-NEXT: testb $1, {{[0-9]+}}(%esp) ; X86-NEXT: cmovnel %ecx, %edx ; X86-NEXT: xorl %edx, %eax ; X86-NEXT: retl ; ; X64-LABEL: xor_select_sub_1_different_op: ; X64: # %bb.0: ; X64-NEXT: # kill: def $edx killed $edx def $rdx ; X64-NEXT: leal -1(%rdx), %ecx ; X64-NEXT: xorl %eax, %eax ; X64-NEXT: testb $1, %dil ; X64-NEXT: cmovnel %ecx, %eax ; X64-NEXT: xorl %esi, %eax ; X64-NEXT: retq %sub = add i32 %a2, -1 %bls = select i1 %a0, i32 %sub, i32 0 %ret = xor i32 %a1, %bls ret i32 %ret }