190 lines
4.8 KiB
LLVM
190 lines
4.8 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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target datalayout = "e-p:64:64:64-p1:16:16:16-p2:32:32:32-p3:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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declare void @usei8ptr(i8* %ptr)
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; Ensure that we do not crash when looking at such a weird bitcast.
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define i1 @bitcast_from_single_element_pointer_vector_to_pointer(<1 x i8*> %ptr1vec, i8* %ptr2) {
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; CHECK-LABEL: @bitcast_from_single_element_pointer_vector_to_pointer(
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; CHECK-NEXT: [[PTR1:%.*]] = bitcast <1 x i8*> [[PTR1VEC:%.*]] to i8*
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; CHECK-NEXT: call void @usei8ptr(i8* [[PTR1]])
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8* [[PTR1]], [[PTR2:%.*]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%ptr1 = bitcast <1 x i8*> %ptr1vec to i8*
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call void @usei8ptr(i8* %ptr1)
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%cmp = icmp eq i8* %ptr1, %ptr2
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ret i1 %cmp
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}
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; TODO: these should return poison
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define i1 @poison(i32 %x) {
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; CHECK-LABEL: @poison(
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; CHECK-NEXT: ret i1 undef
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;
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%v = icmp eq i32 %x, poison
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ret i1 %v
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}
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define i1 @poison2(i32 %x) {
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; CHECK-LABEL: @poison2(
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; CHECK-NEXT: ret i1 false
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;
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%v = icmp slt i32 %x, poison
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ret i1 %v
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}
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define i1 @mul_div_cmp_smaller(i8 %x) {
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; CHECK-LABEL: @mul_div_cmp_smaller(
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; CHECK-NEXT: ret i1 true
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;
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%mul = mul i8 %x, 3
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%div = udiv i8 %mul, 4
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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define i1 @mul_div_cmp_equal(i8 %x) {
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; CHECK-LABEL: @mul_div_cmp_equal(
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; CHECK-NEXT: ret i1 true
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;
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%mul = mul i8 %x, 3
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%div = udiv i8 %mul, 3
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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; Negative test: 3>2
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define i1 @mul_div_cmp_greater(i8 %x) {
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; CHECK-LABEL: @mul_div_cmp_greater(
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; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 3
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; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 2
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; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[DIV]], [[X]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%mul = mul i8 %x, 3
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%div = udiv i8 %mul, 2
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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define i1 @mul_div_cmp_ugt(i8 %x) {
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; CHECK-LABEL: @mul_div_cmp_ugt(
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; CHECK-NEXT: ret i1 false
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;
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%mul = mul i8 %x, 3
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%div = udiv i8 %mul, 4
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%cmp = icmp ugt i8 %div, %x
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ret i1 %cmp
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}
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; Negative test: Wrong predicate
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define i1 @mul_div_cmp_uge(i8 %x) {
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; CHECK-LABEL: @mul_div_cmp_uge(
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; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 3
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; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 4
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; CHECK-NEXT: [[CMP:%.*]] = icmp uge i8 [[DIV]], [[X]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%mul = mul i8 %x, 3
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%div = udiv i8 %mul, 4
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%cmp = icmp uge i8 %div, %x
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ret i1 %cmp
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}
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; Negative test: Wrong predicate
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define i1 @mul_div_cmp_ult(i8 %x) {
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; CHECK-LABEL: @mul_div_cmp_ult(
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; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 3
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; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 4
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[DIV]], [[X]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%mul = mul i8 %x, 3
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%div = udiv i8 %mul, 4
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%cmp = icmp ult i8 %div, %x
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ret i1 %cmp
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}
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; Negative test: Wrong icmp operand
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define i1 @mul_div_cmp_wrong_operand(i8 %x, i8 %y) {
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; CHECK-LABEL: @mul_div_cmp_wrong_operand(
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; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 3
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; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 4
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; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[DIV]], [[Y:%.*]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%mul = mul i8 %x, 3
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%div = udiv i8 %mul, 4
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%cmp = icmp ule i8 %div, %y
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ret i1 %cmp
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}
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define i1 @mul_lshr_cmp_smaller(i8 %x) {
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; CHECK-LABEL: @mul_lshr_cmp_smaller(
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; CHECK-NEXT: ret i1 true
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;
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%mul = mul i8 %x, 3
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%div = lshr i8 %mul, 2
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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define i1 @mul_lshr_cmp_equal(i8 %x) {
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; CHECK-LABEL: @mul_lshr_cmp_equal(
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; CHECK-NEXT: ret i1 true
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;
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%mul = mul i8 %x, 4
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%div = lshr i8 %mul, 2
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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define i1 @mul_lshr_cmp_greater(i8 %x) {
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; CHECK-LABEL: @mul_lshr_cmp_greater(
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; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 5
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; CHECK-NEXT: [[DIV:%.*]] = lshr i8 [[MUL]], 2
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; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[DIV]], [[X]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%mul = mul i8 %x, 5
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%div = lshr i8 %mul, 2
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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define i1 @shl_div_cmp_smaller(i8 %x) {
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; CHECK-LABEL: @shl_div_cmp_smaller(
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; CHECK-NEXT: ret i1 true
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;
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%mul = shl i8 %x, 2
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%div = udiv i8 %mul, 5
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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define i1 @shl_div_cmp_equal(i8 %x) {
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; CHECK-LABEL: @shl_div_cmp_equal(
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; CHECK-NEXT: ret i1 true
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;
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%mul = shl i8 %x, 2
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%div = udiv i8 %mul, 4
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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define i1 @shl_div_cmp_greater(i8 %x) {
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; CHECK-LABEL: @shl_div_cmp_greater(
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; CHECK-NEXT: [[MUL:%.*]] = shl i8 [[X:%.*]], 2
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; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 3
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; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[DIV]], [[X]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%mul = shl i8 %x, 2
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%div = udiv i8 %mul, 3
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%cmp = icmp ule i8 %div, %x
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ret i1 %cmp
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}
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