307 lines
9 KiB
LLVM
307 lines
9 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=instcombine < %s | FileCheck %s
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define i32 @or_and_shifts1(i32 %x) {
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; CHECK-LABEL: @or_and_shifts1(
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; CHECK-NEXT: [[I:%.*]] = shl i32 [[X:%.*]], 3
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; CHECK-NEXT: [[I1:%.*]] = and i32 [[I]], 8
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; CHECK-NEXT: [[I2:%.*]] = shl i32 [[X]], 5
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; CHECK-NEXT: [[I3:%.*]] = and i32 [[I2]], 32
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; CHECK-NEXT: [[I4:%.*]] = or disjoint i32 [[I1]], [[I3]]
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; CHECK-NEXT: ret i32 [[I4]]
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;
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%i = shl i32 %x, 3
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%i1 = and i32 %i, 15
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%i2 = shl i32 %x, 5
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%i3 = and i32 %i2, 60
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%i4 = or i32 %i1, %i3
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ret i32 %i4
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}
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define i32 @or_and_shifts2(i32 %x) {
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; CHECK-LABEL: @or_and_shifts2(
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; CHECK-NEXT: [[I:%.*]] = shl i32 [[X:%.*]], 3
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; CHECK-NEXT: [[I1:%.*]] = and i32 [[I]], 896
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; CHECK-NEXT: [[I2:%.*]] = lshr i32 [[X]], 4
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; CHECK-NEXT: [[I3:%.*]] = and i32 [[I2]], 7
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; CHECK-NEXT: [[I4:%.*]] = or disjoint i32 [[I1]], [[I3]]
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; CHECK-NEXT: ret i32 [[I4]]
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;
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%i = shl i32 %x, 3
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%i1 = and i32 %i, 896
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%i2 = lshr i32 %x, 4
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%i3 = and i32 %i2, 7
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%i4 = or i32 %i1, %i3
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ret i32 %i4
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}
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define i32 @or_and_shift_shift_and(i32 %x) {
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; CHECK-LABEL: @or_and_shift_shift_and(
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; CHECK-NEXT: [[I:%.*]] = shl i32 [[X:%.*]], 3
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; CHECK-NEXT: [[I1:%.*]] = and i32 [[I]], 56
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; CHECK-NEXT: [[I2:%.*]] = shl i32 [[X]], 2
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; CHECK-NEXT: [[I3:%.*]] = and i32 [[I2]], 28
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; CHECK-NEXT: [[I4:%.*]] = or i32 [[I1]], [[I3]]
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; CHECK-NEXT: ret i32 [[I4]]
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;
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%i = and i32 %x, 7
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%i1 = shl i32 %i, 3
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%i2 = shl i32 %x, 2
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%i3 = and i32 %i2, 28
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%i4 = or i32 %i1, %i3
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ret i32 %i4
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}
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define i32 @multiuse1(i32 %x) {
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; CHECK-LABEL: @multiuse1(
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; CHECK-NEXT: [[I:%.*]] = lshr i32 [[X:%.*]], 1
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; CHECK-NEXT: [[I3:%.*]] = and i32 [[I]], 1
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; CHECK-NEXT: [[I1:%.*]] = lshr i32 [[X]], 1
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; CHECK-NEXT: [[I5:%.*]] = and i32 [[I1]], 2
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; CHECK-NEXT: [[I21:%.*]] = shl i32 [[X]], 6
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; CHECK-NEXT: [[I6:%.*]] = and i32 [[I21]], 384
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; CHECK-NEXT: [[I7:%.*]] = or disjoint i32 [[I3]], [[I5]]
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; CHECK-NEXT: [[I8:%.*]] = or disjoint i32 [[I7]], [[I6]]
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; CHECK-NEXT: ret i32 [[I8]]
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;
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%i = and i32 %x, 2
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%i1 = and i32 %x, 4
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%i2 = shl nuw nsw i32 %i, 6
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%i3 = lshr exact i32 %i, 1
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%i4 = shl nuw nsw i32 %i1, 6
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%i5 = lshr exact i32 %i1, 1
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%i6 = or i32 %i2, %i4
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%i7 = or i32 %i3, %i5
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%i8 = or i32 %i7, %i6
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ret i32 %i8
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}
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define i32 @multiuse2(i32 %x) {
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; CHECK-LABEL: @multiuse2(
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; CHECK-NEXT: [[I:%.*]] = shl i32 [[X:%.*]], 1
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; CHECK-NEXT: [[I2:%.*]] = and i32 [[I]], 12
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; CHECK-NEXT: [[I3:%.*]] = shl i32 [[X]], 1
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; CHECK-NEXT: [[I5:%.*]] = and i32 [[I3]], 48
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; CHECK-NEXT: [[I6:%.*]] = shl i32 [[X]], 1
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; CHECK-NEXT: [[I8:%.*]] = and i32 [[I6]], 192
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; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X]], 8
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; CHECK-NEXT: [[I10:%.*]] = and i32 [[TMP1]], 32256
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; CHECK-NEXT: [[I11:%.*]] = or disjoint i32 [[I8]], [[I5]]
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; CHECK-NEXT: [[I12:%.*]] = or disjoint i32 [[I2]], [[I11]]
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; CHECK-NEXT: [[I13:%.*]] = or disjoint i32 [[I10]], [[I12]]
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; CHECK-NEXT: ret i32 [[I13]]
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;
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%i = and i32 %x, 6
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%i1 = shl nuw nsw i32 %i, 8
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%i2 = shl nuw nsw i32 %i, 1
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%i3 = and i32 %x, 24
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%i4 = shl nuw nsw i32 %i3, 8
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%i5 = shl nuw nsw i32 %i3, 1
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%i6 = and i32 %x, 96
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%i7 = shl nuw nsw i32 %i6, 8
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%i8 = shl nuw nsw i32 %i6, 1
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%i9 = or i32 %i1, %i4
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%i10 = or i32 %i7, %i9
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%i11 = or i32 %i8, %i5
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%i12 = or i32 %i2, %i11
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%i13 = or i32 %i10, %i12
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ret i32 %i13
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}
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define i32 @multiuse3(i32 %x) {
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; CHECK-LABEL: @multiuse3(
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; CHECK-NEXT: [[I:%.*]] = lshr i32 [[X:%.*]], 1
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; CHECK-NEXT: [[I2:%.*]] = and i32 [[I]], 48
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; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[X]], 6
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; CHECK-NEXT: [[I5:%.*]] = and i32 [[TMP1]], 8064
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; CHECK-NEXT: [[I6:%.*]] = lshr i32 [[X]], 1
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; CHECK-NEXT: [[I7:%.*]] = and i32 [[I6]], 15
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; CHECK-NEXT: [[I8:%.*]] = or disjoint i32 [[I2]], [[I7]]
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; CHECK-NEXT: [[I9:%.*]] = or disjoint i32 [[I8]], [[I5]]
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; CHECK-NEXT: ret i32 [[I9]]
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;
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%i = and i32 %x, 96
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%i1 = shl nuw nsw i32 %i, 6
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%i2 = lshr exact i32 %i, 1
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%i3 = shl i32 %x, 6
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%i4 = and i32 %i3, 1920
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%i5 = or i32 %i1, %i4
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%i6 = lshr i32 %x, 1
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%i7 = and i32 %i6, 15
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%i8 = or i32 %i2, %i7
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%i9 = or i32 %i8, %i5
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ret i32 %i9
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}
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define i32 @multiuse4(i32 %x) local_unnamed_addr {
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; CHECK-LABEL: @multiuse4(
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; CHECK-NEXT: [[I1:%.*]] = icmp sgt i32 [[X:%.*]], -1
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; CHECK-NEXT: br i1 [[I1]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: if:
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; CHECK-NEXT: [[I:%.*]] = lshr i32 [[X]], 22
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; CHECK-NEXT: [[I2:%.*]] = and i32 [[I]], 24
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; CHECK-NEXT: [[I3:%.*]] = lshr i32 [[X]], 22
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; CHECK-NEXT: [[I4:%.*]] = and i32 [[I3]], 480
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; CHECK-NEXT: [[I5:%.*]] = or disjoint i32 [[I4]], [[I2]]
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X]], 17
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; CHECK-NEXT: [[I9:%.*]] = and i32 [[TMP1]], 16128
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: [[I10:%.*]] = phi i32 [ [[I5]], [[IF]] ], [ [[I9]], [[ELSE]] ]
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; CHECK-NEXT: ret i32 [[I10]]
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;
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%i = and i32 %x, 100663296
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%i1 = icmp sgt i32 %x, -1
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br i1 %i1, label %if, label %else
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if:
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%i2 = lshr exact i32 %i, 22
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%i3 = lshr i32 %x, 22
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%i4 = and i32 %i3, 480
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%i5 = or i32 %i4, %i2
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br label %end
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else:
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%i6 = lshr exact i32 %i, 17
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%i7 = lshr i32 %x, 17
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%i8 = and i32 %i7, 15360
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%i9 = or i32 %i8, %i6
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br label %end
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end:
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%i10 = phi i32 [ %i5, %if ], [ %i9, %else ]
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ret i32 %i10
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}
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define i32 @multiuse5(i32 %x) local_unnamed_addr {
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; CHECK-LABEL: @multiuse5(
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; CHECK-NEXT: [[I:%.*]] = shl i32 [[X:%.*]], 5
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; CHECK-NEXT: [[I1:%.*]] = icmp sgt i32 [[X]], -1
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; CHECK-NEXT: br i1 [[I1]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: if:
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; CHECK-NEXT: [[I2:%.*]] = and i32 [[I]], 21760
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; CHECK-NEXT: [[I3:%.*]] = shl i32 [[X]], 5
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; CHECK-NEXT: [[I4:%.*]] = and i32 [[I3]], 43520
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; CHECK-NEXT: [[I5:%.*]] = or disjoint i32 [[I4]], [[I2]]
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[I6:%.*]] = and i32 [[I]], 5570560
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; CHECK-NEXT: [[I7:%.*]] = shl i32 [[X]], 5
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; CHECK-NEXT: [[I8:%.*]] = and i32 [[I7]], 11141120
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; CHECK-NEXT: [[I9:%.*]] = or disjoint i32 [[I8]], [[I6]]
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: [[I10:%.*]] = phi i32 [ [[I5]], [[IF]] ], [ [[I9]], [[ELSE]] ]
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; CHECK-NEXT: ret i32 [[I10]]
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;
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%i = shl i32 %x, 5
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%i1 = icmp sgt i32 %x, -1
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br i1 %i1, label %if, label %else
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if:
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%i2 = and i32 %i, 21760
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%i3 = and i32 %x, 1360
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%i4 = shl nuw nsw i32 %i3, 5
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%i5 = or i32 %i4, %i2
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br label %end
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else:
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%i6 = and i32 %i, 5570560
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%i7 = and i32 %x, 348160
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%i8 = shl nuw nsw i32 %i7, 5
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%i9 = or i32 %i8, %i6
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br label %end
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end:
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%i10 = phi i32 [ %i5, %if ], [ %i9, %else ]
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ret i32 %i10
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}
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define i32 @shl_mask(i32 %x) {
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; CHECK-LABEL: @shl_mask(
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; CHECK-NEXT: [[Z:%.*]] = and i32 [[X:%.*]], 255
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; CHECK-NEXT: [[S:%.*]] = shl nuw nsw i32 [[Z]], 8
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; CHECK-NEXT: [[R:%.*]] = or disjoint i32 [[Z]], [[S]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%z = and i32 %x, 255
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%s = shl i32 %z, 8
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%r = or i32 %z, %s
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ret i32 %r
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}
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define i32 @shl_mask_wrong_shl_const(i32 %x) {
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; CHECK-LABEL: @shl_mask_wrong_shl_const(
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; CHECK-NEXT: [[Z:%.*]] = and i32 [[X:%.*]], 255
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; CHECK-NEXT: [[S:%.*]] = shl nuw nsw i32 [[Z]], 7
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; CHECK-NEXT: [[R:%.*]] = or i32 [[Z]], [[S]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%z = and i32 %x, 255
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%s = shl i32 %z, 7
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%r = or i32 %z, %s
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ret i32 %r
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}
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define i37 @shl_mask_weird_type(i37 %x) {
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; CHECK-LABEL: @shl_mask_weird_type(
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; CHECK-NEXT: [[Z:%.*]] = and i37 [[X:%.*]], 255
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; CHECK-NEXT: [[S:%.*]] = shl nuw nsw i37 [[Z]], 8
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; CHECK-NEXT: [[R:%.*]] = or disjoint i37 [[Z]], [[S]]
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; CHECK-NEXT: ret i37 [[R]]
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;
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%z = and i37 %x, 255
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%s = shl i37 %z, 8
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%r = or i37 %z, %s
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ret i37 %r
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}
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define i32 @shl_mask_extra_use(i32 %x, ptr %p) {
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; CHECK-LABEL: @shl_mask_extra_use(
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; CHECK-NEXT: [[Z:%.*]] = and i32 [[X:%.*]], 255
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; CHECK-NEXT: [[S:%.*]] = shl nuw nsw i32 [[Z]], 8
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; CHECK-NEXT: store i32 [[S]], ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[R:%.*]] = or disjoint i32 [[Z]], [[S]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%z = and i32 %x, 255
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%s = shl i32 %z, 8
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store i32 %s, ptr %p, align 4
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%r = or i32 %z, %s
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ret i32 %r
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}
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; This could be "Z * 65793".
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define i32 @shl_mul_mask(i32 %x) {
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; CHECK-LABEL: @shl_mul_mask(
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; CHECK-NEXT: [[Z:%.*]] = and i32 [[X:%.*]], 255
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; CHECK-NEXT: [[M:%.*]] = mul nuw nsw i32 [[Z]], 65537
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; CHECK-NEXT: [[S:%.*]] = shl nuw nsw i32 [[Z]], 8
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; CHECK-NEXT: [[R:%.*]] = or i32 [[M]], [[S]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%z = and i32 %x, 255
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%m = mul i32 %z, 65537
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%s = shl i32 %z, 8
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%r = or i32 %m, %s
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ret i32 %r
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}
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define i32 @shl_mul_mask_wrong_mul_const(i32 %x) {
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; CHECK-LABEL: @shl_mul_mask_wrong_mul_const(
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; CHECK-NEXT: [[Z:%.*]] = and i32 [[X:%.*]], 255
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; CHECK-NEXT: [[M:%.*]] = mul nuw nsw i32 [[Z]], 65535
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; CHECK-NEXT: [[S:%.*]] = shl nuw nsw i32 [[Z]], 8
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; CHECK-NEXT: [[R:%.*]] = or i32 [[M]], [[S]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%z = and i32 %x, 255
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%m = mul i32 %z, 65535
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%s = shl i32 %z, 8
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%r = or i32 %m, %s
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ret i32 %r
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}
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