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[NFC][SROA] Add more tests for non-capturing pointer-escaping calls

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Roman Lebedev 2021-11-12 17:06:22 +03:00
parent 0e185ceafb
commit 8d35c054e3
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1 changed files with 62 additions and 0 deletions
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62
llvm/test/Transforms/SROA/non-capturing-call.ll
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@ -772,6 +772,68 @@ exit:
ret [2 x i32] %i3
}
define i32 @all_uses_of_alloca_are_calls(i32* nocapture nonnull readonly %data, i64 %n) {
; CHECK-LABEL: @all_uses_of_alloca_are_calls(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[RETVAL:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[TMP0:%.*]] = call i32 @user_of_alloca(i32* nocapture nonnull [[RETVAL]])
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @user_of_alloca(i32* nocapture nonnull [[RETVAL]])
; CHECK-NEXT: ret i32 0
;
; CHECK-OPAQUE-LABEL: @all_uses_of_alloca_are_calls(
; CHECK-OPAQUE-NEXT: entry:
; CHECK-OPAQUE-NEXT: [[RETVAL:%.*]] = alloca i32, align 4
; CHECK-OPAQUE-NEXT: [[TMP0:%.*]] = call i32 @user_of_alloca(ptr nocapture nonnull [[RETVAL]])
; CHECK-OPAQUE-NEXT: [[TMP1:%.*]] = call i32 @user_of_alloca(ptr nocapture nonnull [[RETVAL]])
; CHECK-OPAQUE-NEXT: ret i32 0
;
entry:
%retval = alloca i32, align 4
call i32 @user_of_alloca(i32* nocapture nonnull %retval)
call i32 @user_of_alloca(i32* nocapture nonnull %retval)
ret i32 0
}
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
define i64 @do_schedule_instrs_for_dce_after_fixups() {
; CHECK-LABEL: @do_schedule_instrs_for_dce_after_fixups(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C:%.*]] = alloca i64, align 2
; CHECK-NEXT: [[TMP0:%.*]] = bitcast i64* [[C]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[TMP0]])
; CHECK-NEXT: [[ARRAYDECAY:%.*]] = bitcast i64* [[C]] to i32*
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAYDECAY]], i64 1
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @user_of_alloca(i32* [[ADD_PTR]])
; CHECK-NEXT: ret i64 0
;
; CHECK-OPAQUE-LABEL: @do_schedule_instrs_for_dce_after_fixups(
; CHECK-OPAQUE-NEXT: entry:
; CHECK-OPAQUE-NEXT: [[C:%.*]] = alloca i64, align 2
; CHECK-OPAQUE-NEXT: [[TMP0:%.*]] = bitcast ptr [[C]] to ptr
; CHECK-OPAQUE-NEXT: call void @llvm.lifetime.start.p0(i64 1, ptr [[TMP0]])
; CHECK-OPAQUE-NEXT: [[ARRAYDECAY:%.*]] = bitcast ptr [[C]] to ptr
; CHECK-OPAQUE-NEXT: br label [[IF_END:%.*]]
; CHECK-OPAQUE: if.end:
; CHECK-OPAQUE-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, ptr [[ARRAYDECAY]], i64 1
; CHECK-OPAQUE-NEXT: [[TMP1:%.*]] = call i32 @user_of_alloca(ptr [[ADD_PTR]])
; CHECK-OPAQUE-NEXT: ret i64 0
;
entry:
%c = alloca i64, align 2
%0 = bitcast i64* %c to i8*
call void @llvm.lifetime.start.p0i8(i64 1, i8* %0)
%arraydecay = bitcast i64* %c to i32*
br label %if.end
if.end: ; preds = %entry
%add.ptr = getelementptr inbounds i32, i32* %arraydecay, i64 1
call i32 @user_of_alloca(i32* %add.ptr)
ret i64 0
}
declare dso_local i32 @user_of_alloca(i32* nocapture nonnull)
declare dso_local i32 @user_of_alloca_with_multiple_args(i32* nocapture nonnull, i32* nocapture nonnull)
declare dso_local i32 @capture_of_alloca(i32 *nonnull)