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[CodeGen][X86][NFC] Copy two selectcc tests from AArch64.
These tests are for DAGCombiner::foldSelectCCToShiftAnd(). Right now, they were only tested for AArch64, but given the upcoming X86 changes to the hasAndNot(), the test coverage needs to be added. These tests originated from D27489 / rL289738 llvm-svn: 331454
This commit is contained in:
Roman Lebedev
parent
c4c90c5eac
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8cf123ed80
27
test/CodeGen/X86/icmp-opt.ll
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27
test/CodeGen/X86/icmp-opt.ll
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@ -0,0 +1,27 @@
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; 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-prefix=CHECK-NOBMI
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi < %s | FileCheck %s --check-prefix=CHECK-BMI
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; Optimize (x > -1) to (x >= 0) etc.
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; Optimize (cmp (add / sub), 0): eliminate the subs used to update flag
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; for comparison only
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; rdar://10233472
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define i32 @t1(i64 %a) {
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; CHECK-NOBMI-LABEL: t1:
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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: testq %rdi, %rdi
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; CHECK-NOBMI-NEXT: setns %al
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: t1:
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; CHECK-BMI: # %bb.0:
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; CHECK-BMI-NEXT: shrq $63, %rdi
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; CHECK-BMI-NEXT: xorl $1, %edi
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; CHECK-BMI-NEXT: movl %edi, %eax
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; CHECK-BMI-NEXT: retq
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%cmp = icmp sgt i64 %a, -1
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%conv = zext i1 %cmp to i32
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ret i32 %conv
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}
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200
test/CodeGen/X86/selectcc-to-shiftand.ll
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200
test/CodeGen/X86/selectcc-to-shiftand.ll
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@ -0,0 +1,200 @@
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; 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-prefix=CHECK-NOBMI
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi < %s | FileCheck %s --check-prefix=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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; CHECK-NOBMI-LABEL: neg_sel_constants:
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; CHECK-NOBMI: # %bb.0:
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; CHECK-NOBMI-NEXT: sarl $31, %edi
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; CHECK-NOBMI-NEXT: andl $5, %edi
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; CHECK-NOBMI-NEXT: movl %edi, %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: neg_sel_constants:
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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: andl $5, %edi
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; CHECK-BMI-NEXT: movl %edi, %eax
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; CHECK-BMI-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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; CHECK-NOBMI-LABEL: neg_sel_special_constant:
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; CHECK-NOBMI: # %bb.0:
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; CHECK-NOBMI-NEXT: shrl $22, %edi
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; CHECK-NOBMI-NEXT: andl $512, %edi # imm = 0x200
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; CHECK-NOBMI-NEXT: movl %edi, %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: neg_sel_special_constant:
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; CHECK-BMI: # %bb.0:
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; CHECK-BMI-NEXT: shrl $22, %edi
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; CHECK-BMI-NEXT: andl $512, %edi # imm = 0x200
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; CHECK-BMI-NEXT: movl %edi, %eax
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; CHECK-BMI-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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; CHECK-NOBMI-LABEL: neg_sel_variable_and_zero:
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; CHECK-NOBMI: # %bb.0:
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; CHECK-NOBMI-NEXT: sarl $31, %edi
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; CHECK-NOBMI-NEXT: andl %esi, %edi
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; CHECK-NOBMI-NEXT: movl %edi, %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: neg_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: andl %esi, %edi
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; CHECK-BMI-NEXT: movl %edi, %eax
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; CHECK-BMI-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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; CHECK-NOBMI-LABEL: not_pos_sel_same_variable:
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; CHECK-NOBMI: # %bb.0:
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; CHECK-NOBMI-NEXT: movl %edi, %eax
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; CHECK-NOBMI-NEXT: sarl $31, %eax
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; CHECK-NOBMI-NEXT: andl %edi, %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: not_pos_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: andl %edi, %eax
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; CHECK-BMI-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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; CHECK-NOBMI-LABEL: pos_sel_constants:
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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: setns %al
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; CHECK-NOBMI-NEXT: leal (%rax,%rax,4), %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: pos_sel_constants:
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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: notl %edi
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; CHECK-BMI-NEXT: andl $5, %edi
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; CHECK-BMI-NEXT: movl %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 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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; CHECK-NOBMI-LABEL: pos_sel_special_constant:
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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: setns %al
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; CHECK-NOBMI-NEXT: shll $9, %eax
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; CHECK-NOBMI-NEXT: retq
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;
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; CHECK-BMI-LABEL: pos_sel_special_constant:
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; CHECK-BMI: # %bb.0:
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; CHECK-BMI-NEXT: shrl $22, %edi
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; CHECK-BMI-NEXT: notl %edi
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; CHECK-BMI-NEXT: andl $512, %edi # imm = 0x200
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; CHECK-BMI-NEXT: movl %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 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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