ee4ba9f3a1
Unfortunately, it seems we really do need to take the long route; start from the "merge" block, find (all the) "dispatch" blocks, and deal with each "dispatch" block separately, instead of simply starting from each "dispatch" block like it would logically make sense, otherwise we run into a number of other missing folds around `switch` formation, missing sinking/hoisting and phase ordering. This reverts commit85628ce75b. This reverts commitc5fff90953. This reverts commit34a98e1046. This reverts commit1e353f0922.
56 lines
1.6 KiB
LLVM
56 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -sink-common-insts -S | FileCheck %s
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; RUN: opt < %s -passes='simplifycfg<sink-common-insts>' -S | FileCheck %s
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define i1 @test1(i1 zeroext %flag, i8* %y) #0 {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[S:%.*]] = call i1 @llvm.type.test(i8* [[Y:%.*]], metadata [[META0:![0-9]+]])
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; CHECK-NEXT: [[R:%.*]] = call i1 @llvm.type.test(i8* [[Y]], metadata [[META1:![0-9]+]])
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; CHECK-NEXT: [[T:%.*]] = select i1 [[FLAG:%.*]], i1 [[R]], i1 [[S]]
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; CHECK-NEXT: ret i1 [[T]]
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;
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%r = call i1 @llvm.type.test(i8* %y, metadata !0)
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br label %if.end
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if.else:
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%s = call i1 @llvm.type.test(i8* %y, metadata !1)
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br label %if.end
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if.end:
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%t = phi i1 [ %s, %if.else ], [ %r, %if.then ]
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ret i1 %t
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}
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!0 = !{i32 0, !"typeid1"}
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!1 = !{i32 4, !"typeid1"}
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declare i1 @llvm.type.test(i8* %ptr, metadata %bitset) nounwind readnone
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define i1 @test2(i1 zeroext %flag, i8* %y, i8* %z) #0 {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[Y_Z:%.*]] = select i1 [[FLAG:%.*]], i8* [[Y:%.*]], i8* [[Z:%.*]]
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; CHECK-NEXT: [[S:%.*]] = call i1 @llvm.type.test(i8* [[Y_Z]], metadata [[META1]])
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; CHECK-NEXT: ret i1 [[S]]
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;
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%r = call i1 @llvm.type.test(i8* %y, metadata !0)
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br label %if.end
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if.else:
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%s = call i1 @llvm.type.test(i8* %z, metadata !0)
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br label %if.end
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if.end:
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%t = phi i1 [ %s, %if.else ], [ %r, %if.then ]
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ret i1 %t
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}
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