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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=dse -S | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
define void @test2(ptr noalias %P) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: store i32 0, ptr [[P:%.*]], align 4
; CHECK-NEXT: ret void
;
store i32 1, ptr %P
br i1 true, label %bb1, label %bb2
bb1:
br label %bb3
bb2:
br label %bb3
bb3:
store i32 0, ptr %P
ret void
}
define void @test3(ptr noalias %P) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: store i32 0, ptr [[P:%.*]], align 4
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: store i32 1, ptr [[P]], align 4
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: ret void
;
store i32 0, ptr %P
br i1 true, label %bb1, label %bb2
bb1:
br label %bb3
bb2:
store i32 1, ptr %P
br label %bb3
bb3:
ret void
}
define void @test7(ptr noalias %P, ptr noalias %Q) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[P:%.*]], align 4
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: store i32 0, ptr [[Q:%.*]], align 4
; CHECK-NEXT: store i32 0, ptr [[P]], align 4
; CHECK-NEXT: ret void
;
store i32 1, ptr %Q
br i1 true, label %bb1, label %bb2
bb1:
load i32, ptr %P
br label %bb3
bb2:
br label %bb3
bb3:
store i32 0, ptr %Q
store i32 0, ptr %P
ret void
}
define i32 @test22(ptr %P, ptr noalias %Q, ptr %R) {
; CHECK-LABEL: @test22(
; CHECK-NEXT: store i32 2, ptr [[P:%.*]], align 4
; CHECK-NEXT: store i32 3, ptr [[Q:%.*]], align 4
; CHECK-NEXT: [[L:%.*]] = load i32, ptr [[R:%.*]], align 4
; CHECK-NEXT: ret i32 [[L]]
;
store i32 1, ptr %Q
store i32 2, ptr %P
store i32 3, ptr %Q
%l = load i32, ptr %R
ret i32 %l
}
define void @test9(ptr noalias %P) {
; CHECK-LABEL: @test9(
; CHECK-NEXT: store i32 0, ptr [[P:%.*]], align 4
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: ret void
; CHECK: bb3:
; CHECK-NEXT: store i32 1, ptr [[P]], align 4
; CHECK-NEXT: ret void
;
store i32 0, ptr %P
br i1 true, label %bb1, label %bb2
bb1:
br label %bb3
bb2:
ret void
bb3:
store i32 1, ptr %P
ret void
}
; We cannot eliminate `store i32 0, ptr %P`, as it is read by the later load.
; Make sure that we check the uses of `store i32 1, ptr %P.1 which does not
; alias %P. Note that uses point to the *first* def that may alias.
define void @overlapping_read(ptr %P) {
; CHECK-LABEL: @overlapping_read(
; CHECK-NEXT: store i32 0, ptr [[P:%.*]], align 4
; CHECK-NEXT: [[P_1:%.*]] = getelementptr i32, ptr [[P]], i32 1
; CHECK-NEXT: store i32 1, ptr [[P_1]], align 4
; CHECK-NEXT: [[LV:%.*]] = load i64, ptr [[P]], align 8
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: store i32 2, ptr [[P]], align 4
; CHECK-NEXT: ret void
;
store i32 0, ptr %P
%P.1 = getelementptr i32, ptr %P, i32 1
store i32 1, ptr %P.1
%lv = load i64, ptr %P
br i1 true, label %bb1, label %bb2
bb1:
br label %bb3
bb2:
br label %bb3
bb3:
store i32 2, ptr %P
ret void
}
define void @test10(ptr %P) {
; CHECK-LABEL: @test10(
; CHECK-NEXT: store i32 0, ptr [[P:%.*]], align 4
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: store i32 1, ptr [[P]], align 4
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: ret void
; CHECK: bb3:
; CHECK-NEXT: ret void
;
store i32 0, ptr %P
br i1 true, label %bb1, label %bb2
bb1:
store i32 1, ptr %P
br label %bb3
bb2:
ret void
bb3:
ret void
}
define void @test11() {
; CHECK-LABEL: @test11(
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: ret void
; CHECK: bb3:
; CHECK-NEXT: ret void
;
%P = alloca i32
store i32 0, ptr %P
br i1 true, label %bb1, label %bb2
bb1:
store i32 0, ptr %P
br label %bb3
bb2:
ret void
bb3:
ret void
}
define void @test12(ptr %P) {
; CHECK-LABEL: @test12(
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: store i32 1, ptr [[P:%.*]], align 4
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: store i32 1, ptr [[P]], align 4
; CHECK-NEXT: ret void
; CHECK: bb3:
; CHECK-NEXT: ret void
;
store i32 0, ptr %P
br i1 true, label %bb1, label %bb2
bb1:
store i32 1, ptr %P
br label %bb3
bb2:
store i32 1, ptr %P
ret void
bb3:
ret void
}
define void @test13(ptr %P) {
; CHECK-LABEL: @test13(
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: store i32 1, ptr [[P:%.*]], align 4
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: store i32 1, ptr [[P]], align 4
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: ret void
;
store i32 0, ptr %P
br i1 true, label %bb1, label %bb2
bb1:
store i32 1, ptr %P
br label %bb3
bb2:
store i32 1, ptr %P
br label %bb3
bb3:
ret void
}
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