| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instsimplify -S | FileCheck %s |
| |
| 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" |
| |
| declare void @usei8ptr(ptr %ptr) |
| |
| ; Ensure that we do not crash when looking at such a weird bitcast. |
| define i1 @bitcast_from_single_element_pointer_vector_to_pointer(<1 x ptr> %ptr1vec, ptr %ptr2) { |
| ; CHECK-LABEL: @bitcast_from_single_element_pointer_vector_to_pointer( |
| ; CHECK-NEXT: [[PTR1:%.*]] = bitcast <1 x ptr> [[PTR1VEC:%.*]] to ptr |
| ; CHECK-NEXT: call void @usei8ptr(ptr [[PTR1]]) |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[PTR1]], [[PTR2:%.*]] |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| %ptr1 = bitcast <1 x ptr> %ptr1vec to ptr |
| call void @usei8ptr(ptr %ptr1) |
| %cmp = icmp eq ptr %ptr1, %ptr2 |
| ret i1 %cmp |
| } |
| |
| define i1 @poison(i32 %x) { |
| ; CHECK-LABEL: @poison( |
| ; CHECK-NEXT: ret i1 poison |
| ; |
| %v = icmp eq i32 %x, poison |
| ret i1 %v |
| } |
| |
| define i1 @poison2(i32 %x) { |
| ; CHECK-LABEL: @poison2( |
| ; CHECK-NEXT: ret i1 poison |
| ; |
| %v = icmp slt i32 %x, poison |
| ret i1 %v |
| } |
| |
| define i1 @mul_div_cmp_smaller(i8 %x) { |
| ; CHECK-LABEL: @mul_div_cmp_smaller( |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %mul = mul i8 %x, 3 |
| %div = udiv i8 %mul, 4 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| define i1 @mul_div_cmp_equal(i8 %x) { |
| ; CHECK-LABEL: @mul_div_cmp_equal( |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %mul = mul i8 %x, 3 |
| %div = udiv i8 %mul, 3 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| ; Negative test: 3>2 |
| define i1 @mul_div_cmp_greater(i8 %x) { |
| ; CHECK-LABEL: @mul_div_cmp_greater( |
| ; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 3 |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 2 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[DIV]], [[X]] |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| %mul = mul i8 %x, 3 |
| %div = udiv i8 %mul, 2 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| define i1 @mul_div_cmp_ugt(i8 %x) { |
| ; CHECK-LABEL: @mul_div_cmp_ugt( |
| ; CHECK-NEXT: ret i1 false |
| ; |
| %mul = mul i8 %x, 3 |
| %div = udiv i8 %mul, 4 |
| %cmp = icmp ugt i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| ; Negative test: Wrong predicate |
| define i1 @mul_div_cmp_uge(i8 %x) { |
| ; CHECK-LABEL: @mul_div_cmp_uge( |
| ; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 3 |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 4 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp uge i8 [[DIV]], [[X]] |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| %mul = mul i8 %x, 3 |
| %div = udiv i8 %mul, 4 |
| %cmp = icmp uge i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| ; Negative test: Wrong predicate |
| define i1 @mul_div_cmp_ult(i8 %x) { |
| ; CHECK-LABEL: @mul_div_cmp_ult( |
| ; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 3 |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 4 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[DIV]], [[X]] |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| %mul = mul i8 %x, 3 |
| %div = udiv i8 %mul, 4 |
| %cmp = icmp ult i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| ; Negative test: Wrong icmp operand |
| define i1 @mul_div_cmp_wrong_operand(i8 %x, i8 %y) { |
| ; CHECK-LABEL: @mul_div_cmp_wrong_operand( |
| ; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 3 |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 4 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[DIV]], [[Y:%.*]] |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| %mul = mul i8 %x, 3 |
| %div = udiv i8 %mul, 4 |
| %cmp = icmp ule i8 %div, %y |
| ret i1 %cmp |
| } |
| |
| define i1 @mul_lshr_cmp_smaller(i8 %x) { |
| ; CHECK-LABEL: @mul_lshr_cmp_smaller( |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %mul = mul i8 %x, 3 |
| %div = lshr i8 %mul, 2 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| define i1 @mul_lshr_cmp_equal(i8 %x) { |
| ; CHECK-LABEL: @mul_lshr_cmp_equal( |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %mul = mul i8 %x, 4 |
| %div = lshr i8 %mul, 2 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| define i1 @mul_lshr_cmp_greater(i8 %x) { |
| ; CHECK-LABEL: @mul_lshr_cmp_greater( |
| ; CHECK-NEXT: [[MUL:%.*]] = mul i8 [[X:%.*]], 5 |
| ; CHECK-NEXT: [[DIV:%.*]] = lshr i8 [[MUL]], 2 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[DIV]], [[X]] |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| %mul = mul i8 %x, 5 |
| %div = lshr i8 %mul, 2 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| define i1 @shl_div_cmp_smaller(i8 %x) { |
| ; CHECK-LABEL: @shl_div_cmp_smaller( |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %mul = shl i8 %x, 2 |
| %div = udiv i8 %mul, 5 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| define i1 @shl_div_cmp_equal(i8 %x) { |
| ; CHECK-LABEL: @shl_div_cmp_equal( |
| ; CHECK-NEXT: ret i1 true |
| ; |
| %mul = shl i8 %x, 2 |
| %div = udiv i8 %mul, 4 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| define i1 @shl_div_cmp_greater(i8 %x) { |
| ; CHECK-LABEL: @shl_div_cmp_greater( |
| ; CHECK-NEXT: [[MUL:%.*]] = shl i8 [[X:%.*]], 2 |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv i8 [[MUL]], 3 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ule i8 [[DIV]], [[X]] |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| %mul = shl i8 %x, 2 |
| %div = udiv i8 %mul, 3 |
| %cmp = icmp ule i8 %div, %x |
| ret i1 %cmp |
| } |
| |
| ; Don't crash matching recurrences/invertible ops. |
| |
| define void @PR50191(i32 %x) { |
| ; CHECK-LABEL: @PR50191( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: loop: |
| ; CHECK-NEXT: [[P1:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ [[SUB1:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[P2:%.*]] = phi i32 [ [[X]], [[ENTRY]] ], [ [[SUB2:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[SUB1]] = sub i32 [[P1]], [[P2]] |
| ; CHECK-NEXT: [[SUB2]] = sub i32 42, [[P2]] |
| ; CHECK-NEXT: br label [[LOOP]] |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %p1 = phi i32 [ %x, %entry ], [ %sub1, %loop ] |
| %p2 = phi i32 [ %x, %entry ], [ %sub2, %loop ] |
| %cmp = icmp eq i32 %p1, %p2 |
| %user = zext i1 %cmp to i32 |
| %sub1 = sub i32 %p1, %p2 |
| %sub2 = sub i32 42, %p2 |
| br label %loop |
| } |