2017-03-15 13:44:59 +08:00
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; RUN: llc -stop-after=branch-folder < %s | FileCheck %s
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;
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; bb2 and bb3 in the IR below will be tail-merged into a single basic block.
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; As br instructions in bb2 and bb3 have the same debug location, make sure that
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; the branch instruction in the merged basic block still maintains the debug
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; location info.
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;
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; CHECK: [[DLOC:![0-9]+]] = !DILocation(line: 2, column: 2, scope: !{{[0-9]+}})
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2018-02-01 06:04:26 +08:00
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; CHECK: TEST64rr{{.*}}$rsi, renamable $rsi, implicit-def $eflags
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[X86] Merge the different Jcc instructions for each condition code into single instructions that store the condition code as an operand.
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
2019-04-06 03:28:09 +08:00
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; CHECK-NEXT: JCC_1{{.*}}, debug-location [[DLOC]]
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2017-03-15 13:44:59 +08:00
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @foo(i1 %b, i8* %p) {
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bb1:
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br i1 %b, label %bb2, label %bb3
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bb2:
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%a1 = icmp eq i8* %p, null
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br i1 %a1, label %bb4, label %bb5, !dbg !6
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bb3:
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%a2 = icmp eq i8* %p, null
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br i1 %a2, label %bb4, label %bb5, !dbg !6
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bb4:
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ret i32 1
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bb5:
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ret i32 0
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)
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!1 = !DIFile(filename: "foo.c", directory: "b/")
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!2 = !{i32 2, !"Dwarf Version", i32 4}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
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!5 = distinct !DILexicalBlock(scope: !4, file: !1, line: 1, column: 1)
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!6 = !DILocation(line: 2, column: 2, scope: !5)
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