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80 lines
1.8 KiB
Plaintext
80 lines
1.8 KiB
Plaintext
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# RUN: llc -mtriple=x86_64-- -verify-machineinstrs -run-pass block-placement -o - %s | FileCheck %s
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# Check the conditional jump in bb.1 is changed to unconditional after block placement swaps bb.2 and bb.3.
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--- |
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@a = external global i16
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@b = external global i32
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declare void @dummy1()
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declare void @dummy2()
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declare void @dummy3()
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; Function Attrs: nounwind
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define void @f2() {
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br i1 undef, label %bb1, label %bb3
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bb1:
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call void @dummy1()
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call void @dummy1()
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call void @dummy1()
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br i1 undef, label %bb2, label %bb2
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bb2:
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call void @dummy2()
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call void @dummy2()
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call void @dummy2()
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br label %bb4
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bb3:
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call void @dummy3()
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call void @dummy3()
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call void @dummy3()
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br label %bb2
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bb4:
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ret void
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}
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...
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---
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# CHECK-LABEL: name: f2
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# CHECK: bb.1:
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# CHECK: JMP_1 %bb.2
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# CHECK: bb.3:
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# CHECK: bb.2:
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name: f2
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body: |
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bb.0 (%ir-block.0):
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successors: %bb.1(50), %bb.3(50)
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JNE_1 %bb.1, implicit %eflags
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JMP_1 %bb.3
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bb.1:
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successors: %bb.2(100)
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CALL64pcrel32 @dummy1, csr_64, implicit %rsp, implicit-def %rsp
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CALL64pcrel32 @dummy1, csr_64, implicit %rsp, implicit-def %rsp
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CALL64pcrel32 @dummy1, csr_64, implicit %rsp, implicit-def %rsp
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JNE_1 %bb.2, implicit %eflags
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bb.2:
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successors: %bb.4(100)
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CALL64pcrel32 @dummy2, csr_64, implicit %rsp, implicit-def %rsp
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CALL64pcrel32 @dummy2, csr_64, implicit %rsp, implicit-def %rsp
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CALL64pcrel32 @dummy2, csr_64, implicit %rsp, implicit-def %rsp
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JMP_1 %bb.4
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bb.3:
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successors: %bb.2(100)
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CALL64pcrel32 @dummy3, csr_64, implicit %rsp, implicit-def %rsp
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CALL64pcrel32 @dummy3, csr_64, implicit %rsp, implicit-def %rsp
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CALL64pcrel32 @dummy3, csr_64, implicit %rsp, implicit-def %rsp
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JMP_1 %bb.2
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bb.4:
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RETQ
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...
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