mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
78 lines
1.9 KiB
LLVM
78 lines
1.9 KiB
LLVM
|
; 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() {
|
||
|
|
%t = icmp eq i32* @opte_a, @opte_b
|
||
|
|
ret i1 %t
|
||
|
|
; CHECK: no_offsets(
|
||
|
|
; CHECK: ret i1 false
|
||
|
|
}
|
||
|
|
|
||
|
|
; Comparing past-the-end addresses of two distinct globals. Never equal.
|
||
|
|
|
||
|
|
define zeroext i1 @both_past_the_end() {
|
||
|
|
%x = getelementptr i32* @opte_a, i32 1
|
||
|
|
%y = getelementptr i32* @opte_b, i32 1
|
||
|
|
%t = icmp eq i32* %x, %y
|
||
|
|
ret i1 %t
|
||
|
|
; CHECK: both_past_the_end(
|
||
|
|
; CHECK-NOT: ret i1 true
|
||
|
|
; 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() {
|
||
|
|
%x = getelementptr i32* @opte_a, i32 1
|
||
|
|
%t = icmp eq i32* %x, @opte_b
|
||
|
|
ret i1 %t
|
||
|
|
; CHECK: just_one_past_the_end(
|
||
|
|
; CHECK: ret i1 icmp eq (i32* getelementptr inbounds (i32* @opte_a, i32 1), i32* @opte_b)
|
||
|
|
}
|
||
|
|
|
||
|
|
; Comparing base addresses of two distinct allocas. Never equal.
|
||
|
|
|
||
|
|
define zeroext i1 @no_alloca_offsets() {
|
||
|
|
%m = alloca i32
|
||
|
|
%n = alloca i32
|
||
|
|
%t = icmp eq i32* %m, %n
|
||
|
|
ret i1 %t
|
||
|
|
; CHECK: no_alloca_offsets(
|
||
|
|
; CHECK: ret i1 false
|
||
|
|
}
|
||
|
|
|
||
|
|
; Comparing past-the-end addresses of two distinct allocas. Never equal.
|
||
|
|
|
||
|
|
define zeroext i1 @both_past_the_end_alloca() {
|
||
|
|
%m = alloca i32
|
||
|
|
%n = alloca i32
|
||
|
|
%x = getelementptr i32* %m, i32 1
|
||
|
|
%y = getelementptr i32* %n, i32 1
|
||
|
|
%t = icmp eq i32* %x, %y
|
||
|
|
ret i1 %t
|
||
|
|
; CHECK: both_past_the_end_alloca(
|
||
|
|
; CHECK-NOT: ret i1 true
|
||
|
|
; 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() {
|
||
|
|
%m = alloca i32
|
||
|
|
%n = alloca i32
|
||
|
|
%x = getelementptr i32* %m, i32 1
|
||
|
|
%t = icmp eq i32* %x, %n
|
||
|
|
ret i1 %t
|
||
|
|
; CHECK: just_one_past_the_end_alloca(
|
||
|
|
; CHECK: ret i1 %t
|
||
|
|
}
|