80aa2290fb
Summary: This avoids needing an isel pattern for each condition code. And it removes translation switches for converting between Jcc instructions and condition codes. Now the printer, encoder and disassembler take care of converting the immediate. We use InstAliases to handle the assembly matching. But we print using the asm string in the instruction definition. The instruction itself is marked IsCodeGenOnly=1 to hide it from the assembly parser. Reviewers: spatel, lebedev.ri, courbet, gchatelet, RKSimon Reviewed By: RKSimon Subscribers: MatzeB, qcolombet, eraman, hiraditya, arphaman, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D60228 llvm-svn: 357802
80 lines
1.8 KiB
YAML
80 lines
1.8 KiB
YAML
# 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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JCC_1 %bb.1, 2, 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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JCC_1 %bb.2, 5, 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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