486 lines
17 KiB
LLVM
486 lines
17 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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declare void @use8(i8)
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declare void @use1(i1)
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declare void @llvm.assume(i1)
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; Here we don't know that at least one of the values being added is non-zero
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define i1 @t0_bad(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t0_bad(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i8 [[ADJUSTED]], [[BASE]]
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; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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%no_underflow = icmp ult i8 %adjusted, %base
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%r = and i1 %not_null, %no_underflow
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ret i1 %r
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}
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define i1 @t0_bad_logical(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t0_bad_logical(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i8 [[ADJUSTED]], [[BASE]]
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; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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%no_underflow = icmp ult i8 %adjusted, %base
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%r = select i1 %not_null, i1 %no_underflow, i1 false
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ret i1 %r
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}
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; Ok, base is non-zero.
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define i1 @t1(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t1(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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%no_underflow = icmp ult i8 %adjusted, %base
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%r = and i1 %not_null, %no_underflow
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ret i1 %r
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}
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define i1 @t1_logical(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t1_logical(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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%no_underflow = icmp ult i8 %adjusted, %base
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%r = select i1 %not_null, i1 %no_underflow, i1 false
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ret i1 %r
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}
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; Ok, offset is non-zero.
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define i1 @t2(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t2(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[OFFSET:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %offset, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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%no_underflow = icmp ult i8 %adjusted, %base
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%r = and i1 %not_null, %no_underflow
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ret i1 %r
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}
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define i1 @t2_logical(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t2_logical(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[OFFSET:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %offset, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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%no_underflow = icmp ult i8 %adjusted, %base
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%r = select i1 %not_null, i1 %no_underflow, i1 false
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ret i1 %r
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}
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; We need to produce extra instruction, so one of icmp's must go away.
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define i1 @t3_oneuse0(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t3_oneuse0(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
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; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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call void @use1(i1 %not_null)
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%no_underflow = icmp ult i8 %adjusted, %base
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%r = and i1 %not_null, %no_underflow
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ret i1 %r
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}
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define i1 @t3_oneuse0_logical(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t3_oneuse0_logical(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
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; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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call void @use1(i1 %not_null)
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%no_underflow = icmp ult i8 %adjusted, %base
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%r = select i1 %not_null, i1 %no_underflow, i1 false
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ret i1 %r
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}
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define i1 @t4_oneuse1(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t4_oneuse1(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i8 [[ADJUSTED]], [[BASE]]
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; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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%no_underflow = icmp ult i8 %adjusted, %base
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call void @use1(i1 %no_underflow)
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%r = and i1 %not_null, %no_underflow
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ret i1 %r
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}
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define i1 @t4_oneuse1_logical(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t4_oneuse1_logical(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i8 [[ADJUSTED]], [[BASE]]
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; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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%no_underflow = icmp ult i8 %adjusted, %base
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call void @use1(i1 %no_underflow)
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%r = select i1 %not_null, i1 %no_underflow, i1 false
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ret i1 %r
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}
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define i1 @t5_oneuse2_bad(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t5_oneuse2_bad(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
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; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i8 [[ADJUSTED]], [[BASE]]
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; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
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; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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call void @use1(i1 %not_null)
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%no_underflow = icmp ult i8 %adjusted, %base
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call void @use1(i1 %no_underflow)
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%r = and i1 %not_null, %no_underflow
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ret i1 %r
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}
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define i1 @t5_oneuse2_bad_logical(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t5_oneuse2_bad_logical(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
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; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i8 [[ADJUSTED]], [[BASE]]
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; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
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; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp ne i8 %adjusted, 0
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call void @use1(i1 %not_null)
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%no_underflow = icmp ult i8 %adjusted, %base
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call void @use1(i1 %no_underflow)
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%r = select i1 %not_null, i1 %no_underflow, i1 false
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ret i1 %r
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}
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define i1 @t6_commutativity0(i8 %base, i8 %offset) {
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; CHECK-LABEL: @t6_commutativity0(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[TMP2]]
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;
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%cmp = icmp slt i8 %base, 0
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call void @llvm.assume(i1 %cmp)
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%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp ne i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp ult i8 %adjusted, %base
|
||
|
|
%r = and i1 %no_underflow, %not_null ; swapped
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @t6_commutativity0_logical(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t6_commutativity0_logical(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp ne i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp ult i8 %adjusted, %base
|
||
|
|
%r = select i1 %no_underflow, i1 %not_null, i1 false ; swapped
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
define i1 @t7_commutativity1(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t7_commutativity1(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp ne i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp ugt i8 %base, %adjusted ; swapped
|
||
|
|
%r = and i1 %not_null, %no_underflow
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @t7_commutativity1_logical(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t7_commutativity1_logical(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp ne i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp ugt i8 %base, %adjusted ; swapped
|
||
|
|
%r = select i1 %not_null, i1 %no_underflow, i1 false
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
define i1 @t7_commutativity3(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t7_commutativity3(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp ne i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp ugt i8 %base, %adjusted ; swapped
|
||
|
|
%r = and i1 %no_underflow, %not_null ; swapped
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @t7_commutativity3_logical(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t7_commutativity3_logical(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp ne i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp ugt i8 %base, %adjusted ; swapped
|
||
|
|
%r = select i1 %no_underflow, i1 %not_null, i1 false ; swapped
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; We could have the opposite question, did we get null or overflow happened?
|
||
|
|
define i1 @t8(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t8(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp uge i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp eq i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp uge i8 %adjusted, %base
|
||
|
|
%r = or i1 %not_null, %no_underflow
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @t8_logical(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t8_logical(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp uge i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp eq i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp uge i8 %adjusted, %base
|
||
|
|
%r = select i1 %not_null, i1 true, i1 %no_underflow
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; The comparison can be with any of the values being added.
|
||
|
|
define i1 @t9(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t9(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp ne i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp ult i8 %adjusted, %offset
|
||
|
|
%r = and i1 %not_null, %no_underflow
|
||
|
|
ret i1 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i1 @t9_logical(i8 %base, i8 %offset) {
|
||
|
|
; CHECK-LABEL: @t9_logical(
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[BASE:%.*]], 0
|
||
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
|
||
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE]], [[OFFSET:%.*]]
|
||
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
||
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]]
|
||
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]]
|
||
|
|
; CHECK-NEXT: ret i1 [[TMP2]]
|
||
|
|
;
|
||
|
|
%cmp = icmp slt i8 %base, 0
|
||
|
|
call void @llvm.assume(i1 %cmp)
|
||
|
|
|
||
|
|
%adjusted = add i8 %base, %offset
|
||
|
|
call void @use8(i8 %adjusted)
|
||
|
|
%not_null = icmp ne i8 %adjusted, 0
|
||
|
|
%no_underflow = icmp ult i8 %adjusted, %offset
|
||
|
|
%r = select i1 %not_null, i1 %no_underflow, i1 false
|
||
|
|
ret i1 %r
|
||
|
|
}
|