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[SystemZ] Return true from convertSetCCLogicToBitwiseLogic for scalar integer.

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Review: Ulrich Weigand
This commit is contained in:
Jonas Paulsson 2021-06-01 11:38:00 -05:00
parent 26c9404ebd
commit e4de68ed74
2 changed files with 28 additions and 0 deletions
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3
lib/Target/SystemZ/SystemZISelLowering.h
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@ -441,6 +441,9 @@ public:
ConstantInt* Mask = dyn_cast<ConstantInt>(AndI.getOperand(1)); ConstantInt* Mask = dyn_cast<ConstantInt>(AndI.getOperand(1));
return Mask && Mask->getValue().isIntN(16); return Mask && Mask->getValue().isIntN(16);
} }
bool convertSetCCLogicToBitwiseLogic(EVT VT) const override {
return VT.isScalarInteger();
}
EVT getSetCCResultType(const DataLayout &DL, LLVMContext &, EVT getSetCCResultType(const DataLayout &DL, LLVMContext &,
EVT) const override; EVT) const override;
bool isFMAFasterThanFMulAndFAdd(const MachineFunction &MF, bool isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,

25
test/CodeGen/SystemZ/int-cmp-61.ll Normal file
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@ -0,0 +1,25 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 | FileCheck %s
;
; Test using bitwise logic on icmp operands instead of i1 logic when
; possible.
define i32 @fun(i32* %Src) {
; CHECK-LABEL: fun:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: lhi %r0, -2
; CHECK-NEXT: s %r0, 0(%r2)
; CHECK-NEXT: nill %r0, 65533
; CHECK-NEXT: chi %r0, 0
; CHECK-NEXT: lhi %r2, 0
; CHECK-NEXT: lochilh %r2, 1
; CHECK-NEXT: br %r14
bb:
%i = load i32, i32* %Src
%i3 = sub nsw i32 0, %i
%i4 = icmp ne i32 %i3, 2
%i5 = icmp ne i32 %i3, 4
%i6 = and i1 %i4, %i5
%i7 = zext i1 %i6 to i32
ret i32 %i7
}