forked from OSchip/llvm-project
[Test] Add more sophisticated tests for switch UB opt
Optimizer is being too smart with existing tests, and the transform gets concealed by following transforms.
This commit is contained in:
Max Kazantsev
parent
f29336104d
commit
7e337d8ba2
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@ -2,6 +2,10 @@
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; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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declare void @foo_01()
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declare void @foo_02()
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declare void @foo_03()
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; TODO: Basing on fact that load(null) is UB, we can remove edge pred->bb.
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; TODO: Basing on fact that load(null) is UB, we can remove edge pred->bb.
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define i32 @test_01(i32* %p, i32 %x, i1 %cond) {
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define i32 @test_01(i32* %p, i32 %x, i1 %cond) {
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; CHECK-LABEL: @test_01(
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; CHECK-LABEL: @test_01(
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@ -73,3 +77,129 @@ bb:
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other_succ:
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other_succ:
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ret i32 0
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ret i32 0
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}
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}
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; TODO: Basing on fact that load(null) is UB, we can remove edge pred->bb.
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define i32 @test_03(i32* %p, i32 %x, i1 %cond) {
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; CHECK-LABEL: @test_03(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB:%.*]], label [[PRED:%.*]]
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; CHECK: pred:
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; CHECK-NEXT: switch i32 [[X:%.*]], label [[BB]] [
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; CHECK-NEXT: i32 42, label [[COMMON_RET:%.*]]
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; CHECK-NEXT: i32 123456, label [[COMMON_RET]]
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; CHECK-NEXT: i32 -654321, label [[COMMON_RET]]
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; CHECK-NEXT: i32 1, label [[DO_1:%.*]]
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; CHECK-NEXT: i32 2, label [[DO_2:%.*]]
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; CHECK-NEXT: i32 3, label [[DO_3:%.*]]
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; CHECK-NEXT: ]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[R:%.*]], [[BB]] ], [ 1, [[DO_1]] ], [ 1, [[DO_2]] ], [ 1, [[DO_3]] ], [ 0, [[PRED]] ], [ 0, [[PRED]] ], [ 0, [[PRED]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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; CHECK: bb:
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; CHECK-NEXT: [[PHI:%.*]] = phi i32* [ null, [[PRED]] ], [ [[P:%.*]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[R]] = load i32, i32* [[PHI]], align 4
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: do_1:
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; CHECK-NEXT: call void @foo_01()
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: do_2:
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; CHECK-NEXT: call void @foo_02()
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: do_3:
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; CHECK-NEXT: call void @foo_03()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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entry:
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br i1 %cond, label %bb, label %pred
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pred:
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switch i32 %x, label %bb [i32 42, label %other_succ
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i32 123456, label %other_succ
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i32 -654321, label %other_succ
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i32 1, label %do_1
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i32 2, label %do_2
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i32 3, label %do_3]
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bb:
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%phi = phi i32* [null, %pred], [%p, %entry]
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%r = load i32, i32* %phi
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ret i32 %r
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do_1:
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call void @foo_01()
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ret i32 1
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do_2:
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call void @foo_02()
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ret i32 1
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do_3:
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call void @foo_03()
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ret i32 1
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other_succ:
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ret i32 0
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}
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; TODO: Basing on fact that load(null) is UB, we can remove edge pred->bb.
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define i32 @test_04(i32* %p, i32 %x, i1 %cond) {
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; CHECK-LABEL: @test_04(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB:%.*]], label [[PRED:%.*]]
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; CHECK: pred:
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; CHECK-NEXT: switch i32 [[X:%.*]], label [[COMMON_RET:%.*]] [
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; CHECK-NEXT: i32 42, label [[BB]]
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; CHECK-NEXT: i32 123456, label [[BB]]
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; CHECK-NEXT: i32 -654321, label [[BB]]
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; CHECK-NEXT: i32 1, label [[DO_1:%.*]]
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; CHECK-NEXT: i32 2, label [[DO_2:%.*]]
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; CHECK-NEXT: i32 3, label [[DO_3:%.*]]
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; CHECK-NEXT: ]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ [[R:%.*]], [[BB]] ], [ 1, [[DO_1]] ], [ 1, [[DO_2]] ], [ 1, [[DO_3]] ], [ 0, [[PRED]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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; CHECK: bb:
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; CHECK-NEXT: [[PHI:%.*]] = phi i32* [ null, [[PRED]] ], [ null, [[PRED]] ], [ null, [[PRED]] ], [ [[P:%.*]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[R]] = load i32, i32* [[PHI]], align 4
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: do_1:
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; CHECK-NEXT: call void @foo_01()
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: do_2:
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; CHECK-NEXT: call void @foo_02()
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: do_3:
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; CHECK-NEXT: call void @foo_03()
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; CHECK-NEXT: br label [[COMMON_RET]]
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;
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entry:
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br i1 %cond, label %bb, label %pred
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pred:
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switch i32 %x, label %other_succ [i32 42, label %bb
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i32 123456, label %bb
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i32 -654321, label %bb
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i32 1, label %do_1
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i32 2, label %do_2
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i32 3, label %do_3]
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bb:
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%phi = phi i32* [null, %pred], [null, %pred], [null, %pred], [%p, %entry]
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%r = load i32, i32* %phi
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ret i32 %r
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do_1:
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call void @foo_01()
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ret i32 1
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do_2:
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call void @foo_02()
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ret i32 1
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do_3:
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call void @foo_03()
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ret i32 1
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other_succ:
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ret i32 0
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}
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