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|
; RUN: opt %s -passes=newgvn -S | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define i8* @test1(i8** %v0, i8** %v1) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: top:
; CHECK-NEXT: [[V2:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], align 8, !nonnull !0
; CHECK-NEXT: store i8* [[V2]], i8** [[V1:%.*]]
; CHECK-NEXT: ret i8* [[V2]]
;
top:
%v2 = load i8*, i8** %v0, !nonnull !0
store i8* %v2, i8** %v1
%v3 = load i8*, i8** %v1
ret i8* %v3
}
; FIXME: could propagate nonnull to first load?
define i8* @test2(i8** %v0, i8** %v1) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: top:
; CHECK-NEXT: [[V2:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
; CHECK-NOT: !nonnull
; CHECK-NEXT: store i8* [[V2]], i8** [[V1:%.*]]
; CHECK-NEXT: ret i8* [[V2]]
;
top:
%v2 = load i8*, i8** %v0
store i8* %v2, i8** %v1
%v3 = load i8*, i8** %v1, !nonnull !0
ret i8* %v3
}
declare void @use1(i8* %a) readonly
define i8* @test3(i8** %v0) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: top:
; CHECK-NEXT: [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
; CHECK-NOT: !nonnull
; CHECK-NEXT: call void @use1(i8* [[V1]])
; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: ret i8* [[V1]]
; CHECK: bb2:
; CHECK-NEXT: ret i8* [[V1]]
;
top:
%v1 = load i8*, i8** %v0
call void @use1(i8* %v1)
br i1 undef, label %bb1, label %bb2
bb1:
%v2 = load i8*, i8** %v0, !nonnull !0
ret i8* %v2
bb2:
%v3 = load i8*, i8** %v0
ret i8* %v3
}
define i8* @test4(i8** %v0) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: top:
; CHECK-NEXT: [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
; CHECK-NOT: !nonnull
; CHECK-NEXT: call void @use1(i8* [[V1]])
; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: ret i8* [[V1]]
; CHECK: bb2:
; CHECK-NEXT: ret i8* [[V1]]
;
top:
%v1 = load i8*, i8** %v0
call void @use1(i8* %v1)
br i1 undef, label %bb1, label %bb2
bb1:
%v2 = load i8*, i8** %v0
ret i8* %v2
bb2:
%v3 = load i8*, i8** %v0, !nonnull !0
ret i8* %v3
}
define i8* @test5(i8** %v0) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: top:
; CHECK-NEXT: [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], align 8, !nonnull !0
; CHECK-NEXT: call void @use1(i8* [[V1]])
; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: ret i8* [[V1]]
; CHECK: bb2:
; CHECK-NEXT: ret i8* [[V1]]
;
top:
%v1 = load i8*, i8** %v0, !nonnull !0
call void @use1(i8* %v1)
br i1 undef, label %bb1, label %bb2
bb1:
%v2 = load i8*, i8** %v0
ret i8* %v2
bb2:
%v3 = load i8*, i8** %v0
ret i8* %v3
}
define i8* @test6(i8** %v0, i8** %v1) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: top:
; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[V2:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], align 8, !nonnull !0
; CHECK-NEXT: store i8* [[V2]], i8** [[V1:%.*]]
; CHECK-NEXT: ret i8* [[V2]]
; CHECK: bb2:
; CHECK-NEXT: [[V4:%.*]] = load i8*, i8** [[V0]]
; CHECK-NOT: !nonnull
; CHECK-NEXT: store i8* [[V4]], i8** [[V1]]
; CHECK-NOT: !nonnull
; CHECK-NEXT: ret i8* [[V4]]
;
top:
br i1 undef, label %bb1, label %bb2
bb1:
%v2 = load i8*, i8** %v0, !nonnull !0
store i8* %v2, i8** %v1
%v3 = load i8*, i8** %v1
ret i8* %v3
bb2:
%v4 = load i8*, i8** %v0
store i8* %v4, i8** %v1
%v5 = load i8*, i8** %v1, !nonnull !0
ret i8* %v5
}
declare void @use2(i8* %a)
define i8* @test7(i8** %v0) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: top:
; CHECK-NEXT: [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], align 8, !nonnull !0
; CHECK-NEXT: call void @use2(i8* [[V1]])
; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[V2:%.*]] = load i8*, i8** [[V0]]
; CHECK-NOT: !nonnull
; CHECK-NEXT: ret i8* [[V2]]
; CHECK: bb2:
; CHECK-NEXT: [[V3:%.*]] = load i8*, i8** [[V0]]
; CHECK-NOT: !nonnull
; CHECK-NEXT: ret i8* [[V3]]
;
top:
%v1 = load i8*, i8** %v0, !nonnull !0
call void @use2(i8* %v1)
br i1 undef, label %bb1, label %bb2
bb1:
%v2 = load i8*, i8** %v0
ret i8* %v2
bb2:
%v3 = load i8*, i8** %v0
ret i8* %v3
}
!0 = !{}
|
