94 lines
2.7 KiB
LLVM
94 lines
2.7 KiB
LLVM
; 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
|
|
}
|