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llvm-mirror/test/Transforms/SimplifyCFG/FoldValueComparisonIntoPredecessors-domtree-preservation-edgecase.ll

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[NFC][SimplifyCFG] Add test for switch creation where we fail to maintain DomTree Reduced from vanilla test-suite
2021-01-02 18:11:48 +01:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
[SimplifyCFG] FoldValueComparisonIntoPredecessors(): fine-tune/fix DomTree preservation
2021-01-02 19:27:19 +01:00
; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
[NFC][SimplifyCFG] Add test for switch creation where we fail to maintain DomTree Reduced from vanilla test-suite
2021-01-02 18:11:48 +01:00
define dso_local i32 @readCBPandCoeffsFromNAL(i1 %c, i32 %x, i32 %y) local_unnamed_addr {
; CHECK-LABEL: @readCBPandCoeffsFromNAL(
; CHECK-NEXT: if.end:
[NFCI-ish][SimplifyCFGPass] Rework and generalize `ret` block tail-merging This changes the approach taken to tail-merge the blocks to always create a new block instead of trying to reuse some block, and generalizes it to support dealing not with just the `ret` in the future. This effectively lifts the CallBr restriction, although this isn't really intentional. That is the only non-NFC change here, i'm not sure if it's reasonable/feasible to temporarily retain it. Other restrictions of the transform remain. Reviewed By: rnk Differential Revision: https://reviews.llvm.org/D104598
2021-06-23 13:28:51 +02:00
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_END80:%.*]], label [[COMMON_RET:%.*]]
; CHECK: common.ret:
; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[Y:%.*]], [[IF_END:%.*]] ], [ 1, [[IF_END172237:%.*]] ], [ 0, [[IF_END80]] ], [ 0, [[IF_END80]] ]
; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
[NFC][SimplifyCFG] Add test for switch creation where we fail to maintain DomTree Reduced from vanilla test-suite
2021-01-02 18:11:48 +01:00
; CHECK: if.end80:
; CHECK-NEXT: switch i32 [[X:%.*]], label [[INFLOOP:%.*]] [
; CHECK-NEXT: i32 10, label [[IF_END172237]]
; CHECK-NEXT: i32 14, label [[IF_END172237]]
[NFCI-ish][SimplifyCFGPass] Rework and generalize `ret` block tail-merging This changes the approach taken to tail-merge the blocks to always create a new block instead of trying to reuse some block, and generalizes it to support dealing not with just the `ret` in the future. This effectively lifts the CallBr restriction, although this isn't really intentional. That is the only non-NFC change here, i'm not sure if it's reasonable/feasible to temporarily retain it. Other restrictions of the transform remain. Reviewed By: rnk Differential Revision: https://reviews.llvm.org/D104598
2021-06-23 13:28:51 +02:00
; CHECK-NEXT: i32 9, label [[COMMON_RET]]
; CHECK-NEXT: i32 12, label [[COMMON_RET]]
[NFC][SimplifyCFG] Add test for switch creation where we fail to maintain DomTree Reduced from vanilla test-suite
2021-01-02 18:11:48 +01:00
; CHECK-NEXT: ]
; CHECK: if.end172237:
[NFCI-ish][SimplifyCFGPass] Rework and generalize `ret` block tail-merging This changes the approach taken to tail-merge the blocks to always create a new block instead of trying to reuse some block, and generalizes it to support dealing not with just the `ret` in the future. This effectively lifts the CallBr restriction, although this isn't really intentional. That is the only non-NFC change here, i'm not sure if it's reasonable/feasible to temporarily retain it. Other restrictions of the transform remain. Reviewed By: rnk Differential Revision: https://reviews.llvm.org/D104598
2021-06-23 13:28:51 +02:00
; CHECK-NEXT: br label [[COMMON_RET]]
[NFC][SimplifyCFG] Add test for switch creation where we fail to maintain DomTree Reduced from vanilla test-suite
2021-01-02 18:11:48 +01:00
; CHECK: infloop:
; CHECK-NEXT: br label [[INFLOOP]]
;
if.end:
br i1 %c, label %if.end80, label %if.then64
if.then64: ; preds = %if.end
ret i32 %y
if.end80: ; preds = %if.end
switch i32 %x, label %lor.lhs.false89 [
i32 10, label %if.end172237
i32 14, label %if.end172237
i32 9, label %if.end172
]
lor.lhs.false89: ; preds = %lor.lhs.false89, %if.end80
%cmp91 = icmp eq i32 %x, 12
br i1 %cmp91, label %if.end172, label %lor.lhs.false89
if.end172: ; preds = %lor.lhs.false89, %if.end80
br label %if.end239
if.end172237: ; preds = %if.end80, %if.end80
br label %if.end239
if.end239: ; preds = %if.end172237, %if.end172
%cbp.0 = phi i32 [ 1, %if.end172237 ], [ 0, %if.end172 ]
ret i32 %cbp.0
}
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