derek.holloway
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71 lines
2.1 KiB
LLVM
71 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=aggressive-instcombine -S | FileCheck %s
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define i16 @trunc_shl(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_shl(
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; CHECK-NEXT: [[CMP0:%.*]] = icmp ult i16 [[Y:%.*]], 16
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP0]])
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; CHECK-NEXT: [[I0:%.*]] = shl i16 [[X:%.*]], [[Y]]
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; CHECK-NEXT: ret i16 [[I0]]
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;
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%cmp0 = icmp ult i16 %y, 16
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call void @llvm.assume(i1 %cmp0)
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%zextx = zext i16 %x to i32
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%zexty = zext i16 %y to i32
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%i0 = shl i32 %zextx, %zexty
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%r = trunc i32 %i0 to i16
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ret i16 %r
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}
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define i16 @trunc_lshr(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_lshr(
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; CHECK-NEXT: [[CMP0:%.*]] = icmp ult i16 [[X:%.*]], 0
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i16 [[Y:%.*]], 16
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP0]])
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])
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; CHECK-NEXT: [[I0:%.*]] = lshr i16 [[X]], [[Y]]
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; CHECK-NEXT: ret i16 [[I0]]
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;
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%cmp0 = icmp ult i16 %x, 65536
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%cmp1 = icmp ult i16 %y, 16
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call void @llvm.assume(i1 %cmp0)
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call void @llvm.assume(i1 %cmp1)
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%zextx = zext i16 %x to i32
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%zexty = zext i16 %y to i32
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%i0 = lshr i32 %zextx, %zexty
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%r = trunc i32 %i0 to i16
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ret i16 %r
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}
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define i16 @trunc_ashr(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_ashr(
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; CHECK-NEXT: [[CMP0:%.*]] = icmp slt i16 [[X:%.*]], 32767
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; CHECK-NEXT: [[CMP1:%.*]] = icmp sge i16 [[X]], -32768
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i16 [[Y:%.*]], 16
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP0]])
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP2]])
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; CHECK-NEXT: [[I0:%.*]] = ashr i16 [[X]], [[Y]]
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; CHECK-NEXT: ret i16 [[I0]]
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;
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%cmp0 = icmp slt i16 %x, 32767
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%cmp1 = icmp sge i16 %x, -32768
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%cmp2 = icmp ult i16 %y, 16
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call void @llvm.assume(i1 %cmp0)
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call void @llvm.assume(i1 %cmp1)
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call void @llvm.assume(i1 %cmp2)
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%zextx = sext i16 %x to i32
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%zexty = sext i16 %y to i32
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%i0 = ashr i32 %zextx, %zexty
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%r = trunc i32 %i0 to i16
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ret i16 %r
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}
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declare void @llvm.assume(i1)
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