derek.holloway
7502bf64a4
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88 lines
1.6 KiB
LLVM
88 lines
1.6 KiB
LLVM
; RUN: opt -passes=simplifycfg -S %s | FileCheck %s
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;
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; Minimized regression for repeated branch-weight disjunction in SimplifyCFG.
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; We build a test-and-set ladder that SimplifyCFG merges through
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; mergeConditionalStores. The resulting synthesized branch must keep !prof.
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;
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; CHECK-LABEL: define void @test(
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; CHECK-LABEL: entry:
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; CHECK: br i1 %{{[0-9]+}}, label %{{[0-9]+}}, label %{{[0-9]+}}, !prof ![[BW:[0-9]+]]
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; CHECK: ![[BW]] = !{!"branch_weights", i32 {{-?[0-9]+}}, i32 {{-?[0-9]+}}}
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define void @test(i1 %c0, i1 %c1, i1 %c2, i1 %c3, i1 %c4, i1 %c5, i1 %c6, i1 %c7, i1 %c8, i1 %c9, ptr %p) {
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entry:
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br i1 %c0, label %s0, label %n0, !prof !0
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s0:
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store i32 1, ptr %p, align 4
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br label %n0
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n0:
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br i1 %c1, label %s1, label %n1, !prof !0
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s1:
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store i32 1, ptr %p, align 4
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br label %n1
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n1:
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br i1 %c2, label %s2, label %n2, !prof !0
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s2:
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store i32 1, ptr %p, align 4
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br label %n2
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n2:
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br i1 %c3, label %s3, label %n3, !prof !0
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s3:
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store i32 1, ptr %p, align 4
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br label %n3
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n3:
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br i1 %c4, label %s4, label %n4, !prof !0
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s4:
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store i32 1, ptr %p, align 4
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br label %n4
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n4:
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br i1 %c5, label %s5, label %n5, !prof !0
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s5:
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store i32 1, ptr %p, align 4
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br label %n5
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n5:
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br i1 %c6, label %s6, label %n6, !prof !0
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s6:
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store i32 1, ptr %p, align 4
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br label %n6
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n6:
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br i1 %c7, label %s7, label %n7, !prof !0
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s7:
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store i32 1, ptr %p, align 4
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br label %n7
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n7:
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br i1 %c8, label %s8, label %n8, !prof !0
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s8:
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store i32 1, ptr %p, align 4
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br label %n8
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n8:
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br i1 %c9, label %s9, label %exit, !prof !0
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s9:
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store i32 1, ptr %p, align 4
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br label %exit
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exit:
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ret void
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}
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!0 = !{!"branch_weights", i32 2000, i32 0}
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