mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
fc1584be52
Summary: Following https://reviews.llvm.org/D82607. Reviewers: ychen Subscribers: asbirlea, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D82688
123 lines
3.8 KiB
LLVM
123 lines
3.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -basic-aa -newgvn -S | FileCheck %s
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
define i1 @patatino(i8* %blah, i32 %choice) {
|
|
; CHECK-LABEL: @patatino(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
|
|
; CHECK: while.cond:
|
|
; CHECK-NEXT: [[FOO:%.*]] = phi i8* [ [[BLAH:%.*]], [[ENTRY:%.*]] ], [ null, [[WHILE_BODY:%.*]] ]
|
|
; CHECK-NEXT: switch i32 [[CHOICE:%.*]], label [[WHILE_BODY]] [
|
|
; CHECK-NEXT: i32 -1, label [[WHILE_END:%.*]]
|
|
; CHECK-NEXT: i32 40, label [[LAND_END:%.*]]
|
|
; CHECK-NEXT: ]
|
|
; CHECK: land.end:
|
|
; CHECK-NEXT: br label [[WHILE_END]]
|
|
; CHECK: while.body:
|
|
; CHECK-NEXT: br label [[WHILE_COND]]
|
|
; CHECK: while.end:
|
|
; CHECK-NEXT: store i8 0, i8* [[FOO]], align 1
|
|
; CHECK-NEXT: [[TMP0:%.*]] = load i8, i8* [[BLAH]], align 1
|
|
; CHECK-NEXT: [[LOADED:%.*]] = icmp eq i8 [[TMP0]], 0
|
|
; CHECK-NEXT: store i8 0, i8* [[BLAH]], align 1
|
|
; CHECK-NEXT: ret i1 [[LOADED]]
|
|
;
|
|
entry:
|
|
br label %while.cond
|
|
|
|
while.cond:
|
|
%foo = phi i8* [ %blah, %entry ], [ null, %while.body ]
|
|
switch i32 %choice, label %while.body [
|
|
i32 -1, label %while.end
|
|
i32 40, label %land.end
|
|
]
|
|
|
|
land.end:
|
|
br label %while.end
|
|
|
|
while.body:
|
|
br label %while.cond
|
|
|
|
while.end:
|
|
%foo.lcssa = phi i8* [ %foo, %land.end ], [ %foo, %while.cond ]
|
|
;; These two stores will initially be considered equivalent, but then proven not.
|
|
;; the second store would previously end up deciding it's equivalent to a previous
|
|
;; store, but it was really just finding an optimistic version of itself
|
|
;; in the congruence class.
|
|
store i8 0, i8* %foo.lcssa, align 1
|
|
%0 = load i8, i8* %blah, align 1
|
|
%loaded = icmp eq i8 %0, 0
|
|
store i8 0, i8* %blah, align 1
|
|
ret i1 %loaded
|
|
}
|
|
|
|
|
|
;; This is an example of a case where the memory states are equivalent solely due to unreachability,
|
|
;; but the stores are not equal.
|
|
define void @foo(i8* %arg) {
|
|
; CHECK-LABEL: @foo(
|
|
; CHECK-NEXT: bb:
|
|
; CHECK-NEXT: br label [[BB1:%.*]]
|
|
; CHECK: bb1:
|
|
; CHECK-NEXT: [[TMP:%.*]] = phi i8* [ [[ARG:%.*]], [[BB:%.*]] ], [ null, [[BB2:%.*]] ]
|
|
; CHECK-NEXT: br i1 undef, label [[BB3:%.*]], label [[BB2]]
|
|
; CHECK: bb2:
|
|
; CHECK-NEXT: br label [[BB1]]
|
|
; CHECK: bb3:
|
|
; CHECK-NEXT: store i8 0, i8* [[TMP]], align 1, !g !0
|
|
; CHECK-NEXT: br label [[BB4:%.*]]
|
|
; CHECK: bb4:
|
|
; CHECK-NEXT: br label [[BB6:%.*]]
|
|
; CHECK: bb6:
|
|
; CHECK-NEXT: br i1 undef, label [[BB9:%.*]], label [[BB7:%.*]]
|
|
; CHECK: bb7:
|
|
; CHECK-NEXT: switch i8 0, label [[BB6]] [
|
|
; CHECK-NEXT: i8 6, label [[BB8:%.*]]
|
|
; CHECK-NEXT: ]
|
|
; CHECK: bb8:
|
|
; CHECK-NEXT: store i8 undef, i8* null, align 1
|
|
; CHECK-NEXT: br label [[BB4]]
|
|
; CHECK: bb9:
|
|
; CHECK-NEXT: store i8 0, i8* [[ARG]], align 1, !g !0
|
|
; CHECK-NEXT: unreachable
|
|
;
|
|
bb:
|
|
br label %bb1
|
|
|
|
bb1: ; preds = %bb2, %bb
|
|
%tmp = phi i8* [ %arg, %bb ], [ null, %bb2 ]
|
|
br i1 undef, label %bb3, label %bb2
|
|
|
|
bb2: ; preds = %bb1
|
|
br label %bb1
|
|
|
|
bb3: ; preds = %bb1
|
|
store i8 0, i8* %tmp, !g !0
|
|
br label %bb4
|
|
|
|
bb4: ; preds = %bb8, %bb3
|
|
%tmp5 = phi i8* [ null, %bb8 ], [ %arg, %bb3 ]
|
|
br label %bb6
|
|
|
|
bb6: ; preds = %bb7, %bb4
|
|
br i1 undef, label %bb9, label %bb7
|
|
|
|
bb7: ; preds = %bb6
|
|
switch i8 0, label %bb6 [
|
|
i8 6, label %bb8
|
|
]
|
|
|
|
bb8: ; preds = %bb7
|
|
store i8 undef, i8* %tmp5, !g !0
|
|
br label %bb4
|
|
|
|
bb9: ; preds = %bb6
|
|
%tmp10 = phi i8* [ %tmp5, %bb6 ]
|
|
store i8 0, i8* %tmp10, !g !0
|
|
unreachable
|
|
}
|
|
|
|
!0 = !{}
|