| ; NOTE: Assertions have been autogenerated by update_test_checks.py |
| ; RUN: opt < %s -instsimplify -S | FileCheck %s |
| target datalayout = "p:32:32" |
| |
| ; Check some past-the-end subtleties. |
| |
| @opte_a = global i32 0 |
| @opte_b = global i32 0 |
| |
| ; Comparing base addresses of two distinct globals. Never equal. |
| |
| define zeroext i1 @no_offsets() { |
| ; CHECK-LABEL: @no_offsets( |
| ; CHECK: ret i1 false |
| ; |
| %t = icmp eq i32* @opte_a, @opte_b |
| ret i1 %t |
| } |
| |
| ; Comparing past-the-end addresses of two distinct globals. Never equal. |
| |
| define zeroext i1 @both_past_the_end() { |
| ; CHECK-LABEL: @both_past_the_end( |
| ; CHECK: ret i1 icmp eq (i32* getelementptr inbounds (i32, i32* @opte_a, i32 1), i32* getelementptr inbounds (i32, i32* @opte_b, i32 1)) |
| ; |
| %x = getelementptr i32, i32* @opte_a, i32 1 |
| %y = getelementptr i32, i32* @opte_b, i32 1 |
| %t = icmp eq i32* %x, %y |
| ret i1 %t |
| ; TODO: refine this |
| } |
| |
| ; Comparing past-the-end addresses of one global to the base address |
| ; of another. Can't fold this. |
| |
| define zeroext i1 @just_one_past_the_end() { |
| ; CHECK-LABEL: @just_one_past_the_end( |
| ; CHECK: ret i1 icmp eq (i32* getelementptr inbounds (i32, i32* @opte_a, i32 1), i32* @opte_b) |
| ; |
| %x = getelementptr i32, i32* @opte_a, i32 1 |
| %t = icmp eq i32* %x, @opte_b |
| ret i1 %t |
| } |
| |
| ; Comparing base addresses of two distinct allocas. Never equal. |
| |
| define zeroext i1 @no_alloca_offsets() { |
| ; CHECK-LABEL: @no_alloca_offsets( |
| ; CHECK: ret i1 false |
| ; |
| %m = alloca i32 |
| %n = alloca i32 |
| %t = icmp eq i32* %m, %n |
| ret i1 %t |
| } |
| |
| ; Comparing past-the-end addresses of two distinct allocas. Never equal. |
| |
| define zeroext i1 @both_past_the_end_alloca() { |
| ; CHECK-LABEL: @both_past_the_end_alloca( |
| ; CHECK: [[M:%.*]] = alloca i32 |
| ; CHECK-NEXT: [[N:%.*]] = alloca i32 |
| ; CHECK-NEXT: [[X:%.*]] = getelementptr i32, i32* [[M]], i32 1 |
| ; CHECK-NEXT: [[Y:%.*]] = getelementptr i32, i32* [[N]], i32 1 |
| ; CHECK-NEXT: [[T:%.*]] = icmp eq i32* [[X]], [[Y]] |
| ; CHECK-NEXT: ret i1 [[T]] |
| ; |
| %m = alloca i32 |
| %n = alloca i32 |
| %x = getelementptr i32, i32* %m, i32 1 |
| %y = getelementptr i32, i32* %n, i32 1 |
| %t = icmp eq i32* %x, %y |
| ret i1 %t |
| ; TODO: refine this |
| } |
| |
| ; Comparing past-the-end addresses of one alloca to the base address |
| ; of another. Can't fold this. |
| |
| define zeroext i1 @just_one_past_the_end_alloca() { |
| ; CHECK-LABEL: @just_one_past_the_end_alloca( |
| ; CHECK: [[M:%.*]] = alloca i32 |
| ; CHECK-NEXT: [[N:%.*]] = alloca i32 |
| ; CHECK-NEXT: [[X:%.*]] = getelementptr i32, i32* [[M]], i32 1 |
| ; CHECK-NEXT: [[T:%.*]] = icmp eq i32* [[X]], [[N]] |
| ; CHECK-NEXT: ret i1 [[T]] |
| ; |
| %m = alloca i32 |
| %n = alloca i32 |
| %x = getelementptr i32, i32* %m, i32 1 |
| %t = icmp eq i32* %x, %n |
| ret i1 %t |
| } |