242 lines
7.2 KiB
LLVM
242 lines
7.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=-bmi < %s | FileCheck %s --check-prefixes=ANY,CHECK-NOBMI
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi < %s | FileCheck %s --check-prefixes=ANY,CHECK-BMI
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; Compare if negative and select of constants where one constant is zero.
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define i32 @neg_sel_constants(i32 %a) {
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; ANY-LABEL: neg_sel_constants:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: sarl $31, %eax
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; ANY-NEXT: andl $5, %eax
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; ANY-NEXT: retq
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%tmp.1 = icmp slt i32 %a, 0
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%retval = select i1 %tmp.1, i32 5, i32 0
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ret i32 %retval
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}
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; Compare if negative and select of constants where one constant is zero and the other is a single bit.
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define i32 @neg_sel_special_constant(i32 %a) {
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; ANY-LABEL: neg_sel_special_constant:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: shrl $22, %eax
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; ANY-NEXT: andl $512, %eax # imm = 0x200
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; ANY-NEXT: retq
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%tmp.1 = icmp slt i32 %a, 0
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%retval = select i1 %tmp.1, i32 512, i32 0
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ret i32 %retval
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}
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; Compare if negative and select variable or zero.
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define i32 @neg_sel_variable_and_zero(i32 %a, i32 %b) {
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; ANY-LABEL: neg_sel_variable_and_zero:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: sarl $31, %eax
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; ANY-NEXT: andl %esi, %eax
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; ANY-NEXT: retq
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%tmp.1 = icmp slt i32 %a, 0
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%retval = select i1 %tmp.1, i32 %b, i32 0
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ret i32 %retval
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}
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; Compare if not positive and select the same variable as being compared: smin(a, 0).
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define i32 @not_pos_sel_same_variable(i32 %a) {
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; ANY-LABEL: not_pos_sel_same_variable:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: sarl $31, %eax
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; ANY-NEXT: andl %edi, %eax
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; ANY-NEXT: retq
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%tmp = icmp slt i32 %a, 1
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%min = select i1 %tmp, i32 %a, i32 0
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ret i32 %min
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}
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; Flipping the comparison condition can be handled by getting the bitwise not of the sign mask.
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; Compare if positive and select of constants where one constant is zero.
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define i32 @pos_sel_constants(i32 %a) {
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; ANY-LABEL: pos_sel_constants:
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; ANY: # %bb.0:
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; ANY-NEXT: # kill: def $edi killed $edi def $rdi
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; ANY-NEXT: notl %edi
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; ANY-NEXT: shrl $31, %edi
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; ANY-NEXT: leal (%rdi,%rdi,4), %eax
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; ANY-NEXT: retq
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%tmp.1 = icmp sgt i32 %a, -1
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%retval = select i1 %tmp.1, i32 5, i32 0
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ret i32 %retval
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}
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; Compare if positive and select of constants where one constant is zero and the other is a single bit.
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define i32 @pos_sel_special_constant(i32 %a) {
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; ANY-LABEL: pos_sel_special_constant:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: notl %eax
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; ANY-NEXT: shrl $22, %eax
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; ANY-NEXT: andl $512, %eax # imm = 0x200
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; ANY-NEXT: retq
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%tmp.1 = icmp sgt i32 %a, -1
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%retval = select i1 %tmp.1, i32 512, i32 0
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ret i32 %retval
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}
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; Compare if positive and select variable or zero.
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define i32 @pos_sel_variable_and_zero(i32 %a, i32 %b) {
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; CHECK-NOBMI-LABEL: pos_sel_variable_and_zero:
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; CHECK-NOBMI: # %bb.0:
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; CHECK-NOBMI-NEXT: xorl %eax, %eax
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; CHECK-NOBMI-NEXT: testl %edi, %edi
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; CHECK-NOBMI-NEXT: cmovnsl %esi, %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: pos_sel_variable_and_zero:
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; CHECK-BMI: # %bb.0:
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; CHECK-BMI-NEXT: sarl $31, %edi
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; CHECK-BMI-NEXT: andnl %esi, %edi, %eax
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; CHECK-BMI-NEXT: retq
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%tmp.1 = icmp sgt i32 %a, -1
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%retval = select i1 %tmp.1, i32 %b, i32 0
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ret i32 %retval
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}
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; Compare if not negative or zero and select the same variable as being compared: smax(a, 0).
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define i32 @not_neg_sel_same_variable(i32 %a) {
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; CHECK-NOBMI-LABEL: not_neg_sel_same_variable:
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; CHECK-NOBMI: # %bb.0:
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; CHECK-NOBMI-NEXT: xorl %eax, %eax
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; CHECK-NOBMI-NEXT: testl %edi, %edi
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; CHECK-NOBMI-NEXT: cmovnsl %edi, %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: not_neg_sel_same_variable:
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; CHECK-BMI: # %bb.0:
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; CHECK-BMI-NEXT: movl %edi, %eax
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; CHECK-BMI-NEXT: sarl $31, %eax
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; CHECK-BMI-NEXT: andnl %edi, %eax, %eax
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; CHECK-BMI-NEXT: retq
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%tmp = icmp sgt i32 %a, 0
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%min = select i1 %tmp, i32 %a, i32 0
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ret i32 %min
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}
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; https://llvm.org/bugs/show_bug.cgi?id=31175
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; ret = (x-y) > 0 ? x-y : 0
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define i32 @PR31175(i32 %x, i32 %y) {
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; CHECK-NOBMI-LABEL: PR31175:
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; CHECK-NOBMI: # %bb.0:
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; CHECK-NOBMI-NEXT: xorl %eax, %eax
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; CHECK-NOBMI-NEXT: subl %esi, %edi
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; CHECK-NOBMI-NEXT: cmovnsl %edi, %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: PR31175:
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; CHECK-BMI: # %bb.0:
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; CHECK-BMI-NEXT: subl %esi, %edi
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; CHECK-BMI-NEXT: movl %edi, %eax
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; CHECK-BMI-NEXT: sarl $31, %eax
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; CHECK-BMI-NEXT: andnl %edi, %eax, %eax
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; CHECK-BMI-NEXT: retq
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%sub = sub nsw i32 %x, %y
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%cmp = icmp sgt i32 %sub, 0
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i8 @sel_shift_bool_i8(i1 %t) {
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; ANY-LABEL: sel_shift_bool_i8:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: shlb $7, %al
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; ANY-NEXT: # kill: def $al killed $al killed $eax
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; ANY-NEXT: retq
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%shl = select i1 %t, i8 128, i8 0
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ret i8 %shl
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}
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define i16 @sel_shift_bool_i16(i1 %t) {
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; ANY-LABEL: sel_shift_bool_i16:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: andl $1, %eax
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; ANY-NEXT: shll $7, %eax
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; ANY-NEXT: # kill: def $ax killed $ax killed $eax
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; ANY-NEXT: retq
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%shl = select i1 %t, i16 128, i16 0
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ret i16 %shl
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}
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define i32 @sel_shift_bool_i32(i1 %t) {
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; ANY-LABEL: sel_shift_bool_i32:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: andl $1, %eax
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; ANY-NEXT: shll $6, %eax
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; ANY-NEXT: retq
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%shl = select i1 %t, i32 64, i32 0
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ret i32 %shl
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}
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define i64 @sel_shift_bool_i64(i1 %t) {
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; ANY-LABEL: sel_shift_bool_i64:
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; ANY: # %bb.0:
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; ANY-NEXT: movl %edi, %eax
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; ANY-NEXT: andl $1, %eax
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; ANY-NEXT: shlq $16, %rax
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; ANY-NEXT: retq
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%shl = select i1 %t, i64 65536, i64 0
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ret i64 %shl
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}
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define <16 x i8> @sel_shift_bool_v16i8(<16 x i1> %t) {
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; ANY-LABEL: sel_shift_bool_v16i8:
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; ANY: # %bb.0:
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; ANY-NEXT: psllw $7, %xmm0
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; ANY-NEXT: pand {{.*}}(%rip), %xmm0
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; ANY-NEXT: retq
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%shl = select <16 x i1> %t, <16 x i8> <i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128, i8 128>, <16 x i8> zeroinitializer
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ret <16 x i8> %shl
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}
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define <8 x i16> @sel_shift_bool_v8i16(<8 x i1> %t) {
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; ANY-LABEL: sel_shift_bool_v8i16:
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; ANY: # %bb.0:
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; ANY-NEXT: pand {{.*}}(%rip), %xmm0
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; ANY-NEXT: psllw $7, %xmm0
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; ANY-NEXT: retq
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%shl= select <8 x i1> %t, <8 x i16> <i16 128, i16 128, i16 128, i16 128, i16 128, i16 128, i16 128, i16 128>, <8 x i16> zeroinitializer
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ret <8 x i16> %shl
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}
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define <4 x i32> @sel_shift_bool_v4i32(<4 x i1> %t) {
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; ANY-LABEL: sel_shift_bool_v4i32:
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; ANY: # %bb.0:
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; ANY-NEXT: pand {{.*}}(%rip), %xmm0
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; ANY-NEXT: pslld $6, %xmm0
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; ANY-NEXT: retq
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%shl = select <4 x i1> %t, <4 x i32> <i32 64, i32 64, i32 64, i32 64>, <4 x i32> zeroinitializer
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ret <4 x i32> %shl
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}
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define <2 x i64> @sel_shift_bool_v2i64(<2 x i1> %t) {
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; ANY-LABEL: sel_shift_bool_v2i64:
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; ANY: # %bb.0:
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; ANY-NEXT: pand {{.*}}(%rip), %xmm0
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; ANY-NEXT: psllq $16, %xmm0
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; ANY-NEXT: retq
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%shl = select <2 x i1> %t, <2 x i64> <i64 65536, i64 65536>, <2 x i64> zeroinitializer
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ret <2 x i64> %shl
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}
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