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[DSE,MSSA] Add additional merging test cases (NFC).

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Additional tests added ahead of partial overlapping store merging.
This commit is contained in:
Florian Hahn 2020-06-15 12:34:12 +01:00
parent e95e4419fe
commit 748ec7bf78
1 changed files with 121 additions and 9 deletions
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130
test/Transforms/DeadStoreElimination/MSSA/multiblock-partial.ll
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@ -3,11 +3,10 @@
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
define void @second_store_smaller(i32* noalias %P) {
; CHECK-LABEL: @second_store_smaller(
define void @second_store_smaller_1(i32* noalias %P, i1 %c) {
; CHECK-LABEL: @second_store_smaller_1(
; CHECK-NEXT: store i32 1, i32* [[P:%.*]], align 4
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
@ -18,7 +17,7 @@ define void @second_store_smaller(i32* noalias %P) {
; CHECK-NEXT: ret void
;
store i32 1, i32* %P
br i1 true, label %bb1, label %bb2
br i1 %c, label %bb1, label %bb2
bb1:
br label %bb3
bb2:
@ -29,10 +28,124 @@ bb3:
ret void
}
define void @second_store_smaller_2(i32* noalias %P, i1 %c) {
; CHECK-LABEL: @second_store_smaller_2(
; CHECK-NEXT: store i32 1, i32* [[P:%.*]], align 4
; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: [[P_I16:%.*]] = bitcast i32* [[P]] to i16*
; CHECK-NEXT: store i16 12345, i16* [[P_I16]], align 2
; CHECK-NEXT: ret void
;
store i32 1, i32* %P
br i1 %c, label %bb1, label %bb2
bb1:
br label %bb3
bb2:
br label %bb3
bb3:
%P.i16 = bitcast i32* %P to i16*
store i16 12345, i16* %P.i16
ret void
}
define void @second_store_bigger(i32* noalias %P) {
declare void @use(i16) readnone
declare void @use.i8(i8) readnone
define void @second_store_smaller_3(i32* noalias %P, i1 %c) {
; CHECK-LABEL: @second_store_smaller_3(
; CHECK-NEXT: store i32 1, i32* [[P:%.*]], align 4
; CHECK-NEXT: [[P_I16:%.*]] = bitcast i32* [[P]] to i16*
; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[L1:%.*]] = load i16, i16* [[P_I16]], align 2
; CHECK-NEXT: call void @use(i16 [[L1]])
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: store i16 -31073, i16* [[P_I16]], align 2
; CHECK-NEXT: ret void
;
store i32 1, i32* %P
%P.i16 = bitcast i32* %P to i16*
br i1 %c, label %bb1, label %bb2
bb1:
%l1 = load i16, i16* %P.i16
call void @use(i16 %l1)
br label %bb3
bb2:
br label %bb3
bb3:
store i16 -31073, i16* %P.i16
ret void
}
define void @second_store_smaller_4(i32* noalias %P, i1 %c) {
; CHECK-LABEL: @second_store_smaller_4(
; CHECK-NEXT: store i32 1, i32* [[P:%.*]], align 4
; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[P_I8:%.*]] = bitcast i32* [[P]] to i8*
; CHECK-NEXT: [[L1:%.*]] = load i8, i8* [[P_I8]], align 1
; CHECK-NEXT: call void @use.i8(i8 [[L1]])
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: [[P_I16:%.*]] = bitcast i32* [[P]] to i16*
; CHECK-NEXT: store i16 -31073, i16* [[P_I16]], align 2
; CHECK-NEXT: ret void
;
store i32 1, i32* %P
br i1 %c, label %bb1, label %bb2
bb1:
%P.i8 = bitcast i32* %P to i8*
%l1 = load i8, i8* %P.i8
call void @use.i8(i8 %l1)
br label %bb3
bb2:
br label %bb3
bb3:
%P.i16 = bitcast i32* %P to i16*
store i16 -31073, i16* %P.i16
ret void
}
define void @second_store_smaller_5(i32* noalias %P, i16 %x, i1 %c) {
; CHECK-LABEL: @second_store_smaller_5(
; CHECK-NEXT: store i32 1, i32* [[P:%.*]], align 4
; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: [[P_I16:%.*]] = bitcast i32* [[P]] to i16*
; CHECK-NEXT: store i16 [[X:%.*]], i16* [[P_I16]], align 2
; CHECK-NEXT: ret void
;
store i32 1, i32* %P
br i1 %c, label %bb1, label %bb2
bb1:
br label %bb3
bb2:
br label %bb3
bb3:
%P.i16 = bitcast i32* %P to i16*
store i16 %x, i16* %P.i16
ret void
}
define void @second_store_bigger(i32* noalias %P, i1 %c) {
; CHECK-LABEL: @second_store_bigger(
; CHECK-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb2:
@ -43,7 +156,7 @@ define void @second_store_bigger(i32* noalias %P) {
; CHECK-NEXT: ret void
;
store i32 1, i32* %P
br i1 true, label %bb1, label %bb2
br i1 %c, label %bb1, label %bb2
bb1:
br label %bb3
bb2:
@ -53,4 +166,3 @@ bb3:
store i64 0, i64* %P.i64
ret void
}