340 lines
12 KiB
LLVM
340 lines
12 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt %s -passes=instsimplify -S | FileCheck %s
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; Here we subtract two values, check that subtraction did not overflow AND
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; that the result is non-zero. This can be simplified just to a comparison
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; between the base and offset.
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declare void @use8(i8)
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declare void @use64(i64)
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declare void @use1(i1)
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declare void @llvm.assume(i1)
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; If we are checking that we either did not get null or got no overflow,
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; this is tautological and is always true.
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define i1 @commutativity0(i8 %base, i8 %offset) {
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; CHECK-LABEL: @commutativity0(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
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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: ret i1 true
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%no_underflow = icmp uge i8 %base, %offset
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call void @use1(i1 %no_underflow)
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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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%r = or i1 %not_null, %no_underflow
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ret i1 %r
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}
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define i1 @commutativity1(i8 %base, i8 %offset) {
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; CHECK-LABEL: @commutativity1(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[OFFSET]], [[BASE]]
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; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
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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: ret i1 true
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%no_underflow = icmp ule i8 %offset, %base ; swapped
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call void @use1(i1 %no_underflow)
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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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%r = or i1 %not_null, %no_underflow
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ret i1 %r
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}
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define i1 @commutativity2(i8 %base, i8 %offset) {
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; CHECK-LABEL: @commutativity2(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
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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: ret i1 true
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%no_underflow = icmp uge i8 %base, %offset
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call void @use1(i1 %no_underflow)
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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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%r = or i1 %no_underflow, %not_null ; swapped
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ret i1 %r
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}
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define i1 @commutativity3(i8 %base, i8 %offset) {
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; CHECK-LABEL: @commutativity3(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[OFFSET]], [[BASE]]
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; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
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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: ret i1 true
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%no_underflow = icmp ule i8 %offset, %base ; swapped
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call void @use1(i1 %no_underflow)
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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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%r = or i1 %no_underflow, %not_null ; swapped
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ret i1 %r
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}
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;-------------------------------------------------------------------------------
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define i1 @exaustive_t0_no_underflow(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t0_no_underflow(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub 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 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[NO_UNDERFLOW]]
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;
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%adjusted = sub 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 %base, %offset
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%r = and i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t1_not_null(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t1_not_null(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub 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: ret i1 [[NOT_NULL]]
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;
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%adjusted = sub 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 %base, %offset
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%r = or i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t2_false(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t2_false(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: ret i1 false
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp eq i8 %adjusted, 0
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%no_underflow = icmp ult i8 %base, %offset
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%r = and i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t3_bad(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t3_bad(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: [[R:%.*]] = or i1 [[NO_UNDERFLOW]], [[NOT_NULL]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp eq i8 %adjusted, 0
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%no_underflow = icmp ult i8 %base, %offset
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%r = or i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t4_no_underflow(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t4_no_underflow(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[NO_UNDERFLOW]]
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;
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%adjusted = sub 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 ugt i8 %base, %offset
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%r = and i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t5_not_null(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t5_not_null(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub 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: ret i1 [[NOT_NULL]]
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;
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%adjusted = sub 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 ugt i8 %base, %offset
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%r = or i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t6_false(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t6_false(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: ret i1 false
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp eq i8 %adjusted, 0
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%no_underflow = icmp ugt i8 %base, %offset
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%r = and i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t7_bad(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t7_bad(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: [[R:%.*]] = or i1 [[NO_UNDERFLOW]], [[NOT_NULL]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp eq i8 %adjusted, 0
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%no_underflow = icmp ugt i8 %base, %offset
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%r = or i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t8_bad(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t8_bad(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub 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 ule i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: [[R:%.*]] = and i1 [[NO_UNDERFLOW]], [[NOT_NULL]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%adjusted = sub 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 ule i8 %base, %offset
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%r = and i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t9_true(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t9_true(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: ret i1 true
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;
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%adjusted = sub 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 ule i8 %base, %offset
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%r = or i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t10_not_null(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t10_not_null(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
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; CHECK-NEXT: ret i1 [[NOT_NULL]]
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp eq i8 %adjusted, 0
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%no_underflow = icmp ule i8 %base, %offset
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%r = and i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t11_no_underflow(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t11_no_underflow(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[NO_UNDERFLOW]]
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp eq i8 %adjusted, 0
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%no_underflow = icmp ule i8 %base, %offset
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%r = or i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t12_bad(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t12_bad(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub 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 uge i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: [[R:%.*]] = and i1 [[NO_UNDERFLOW]], [[NOT_NULL]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%adjusted = sub 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 uge i8 %base, %offset
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%r = and i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t13_true(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t13_true(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: ret i1 true
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;
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%adjusted = sub 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 uge i8 %base, %offset
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%r = or i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t14_not_null(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t14_not_null(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
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; CHECK-NEXT: ret i1 [[NOT_NULL]]
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp eq i8 %adjusted, 0
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%no_underflow = icmp uge i8 %base, %offset
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%r = and i1 %no_underflow, %not_null
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ret i1 %r
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}
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define i1 @exaustive_t15_no_underflow(i8 %base, i8 %offset) {
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; CHECK-LABEL: @exaustive_t15_no_underflow(
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; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
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; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]]
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; CHECK-NEXT: ret i1 [[NO_UNDERFLOW]]
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;
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%adjusted = sub i8 %base, %offset
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call void @use8(i8 %adjusted)
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%not_null = icmp eq i8 %adjusted, 0
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%no_underflow = icmp uge i8 %base, %offset
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%r = or i1 %no_underflow, %not_null
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ret i1 %r
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}
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