| ; RUN: llc -fast-isel-sink-local-values -O0 < %s | FileCheck %s |
| |
| target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" |
| target triple = "i386-linux-gnu" |
| |
| ; Try some simple cases that show how local value sinking improves line tables. |
| |
| @sink_across = external global i32 |
| |
| declare void @simple_callee(i32, i32) |
| |
| define void @simple() !dbg !5 { |
| store i32 44, i32* @sink_across, !dbg !7 |
| call void @simple_callee(i32 13, i32 55), !dbg !8 |
| ret void, !dbg !9 |
| } |
| |
| ; CHECK-LABEL: simple: |
| ; CHECK-NOT: movl $13, |
| ; CHECK: .loc 1 1 1 prologue_end |
| ; CHECK: movl $44, sink_across |
| ; CHECK: .loc 1 2 1 |
| ; CHECK: movl $13, |
| ; CHECK: movl $55, |
| ; CHECK: calll simple_callee |
| |
| declare void @simple_reg_callee(i32 inreg, i32 inreg) |
| |
| define void @simple_reg() !dbg !10 { |
| store i32 44, i32* @sink_across, !dbg !11 |
| call void @simple_reg_callee(i32 inreg 13, i32 inreg 55), !dbg !12 |
| ret void, !dbg !13 |
| } |
| |
| ; CHECK-LABEL: simple_reg: |
| ; CHECK: .loc 1 4 1 prologue_end |
| ; CHECK: movl $44, sink_across |
| ; CHECK: .loc 1 5 1 |
| ; CHECK: movl $13, |
| ; CHECK: movl $55, |
| ; CHECK: calll simple_reg_callee |
| |
| ; There are two interesting cases where local values have no uses but are not |
| ; dead: when the local value is directly used by a phi, and when the local |
| ; value is used by a no-op cast instruction. In these cases, we get side tables |
| ; referring to the local value vreg that we need to check. |
| |
| define i8* @phi_const(i32 %c) !dbg !14 { |
| entry: |
| %tobool = icmp eq i32 %c, 0, !dbg !20 |
| call void @llvm.dbg.value(metadata i1 %tobool, metadata !16, metadata !DIExpression()), !dbg !20 |
| br i1 %tobool, label %if.else, label %if.then, !dbg !21 |
| |
| if.then: ; preds = %entry |
| br label %if.end, !dbg !22 |
| |
| if.else: ; preds = %entry |
| br label %if.end, !dbg !23 |
| |
| if.end: ; preds = %if.else, %if.then |
| %r.0 = phi i8* [ inttoptr (i32 42 to i8*), %if.then ], [ inttoptr (i32 1 to i8*), %if.else ], !dbg !24 |
| call void @llvm.dbg.value(metadata i8* %r.0, metadata !18, metadata !DIExpression()), !dbg !24 |
| ret i8* %r.0, !dbg !25 |
| } |
| |
| ; CHECK-LABEL: phi_const: |
| ; CHECK: # %entry |
| ; CHECK: cmpl $0, |
| ; CHECK: # %if.then |
| ; CHECK: movl $42, |
| ; CHECK: jmp |
| ; CHECK: # %if.else |
| ; CHECK: movl $1, |
| ; CHECK: # %if.end |
| |
| define i8* @phi_const_cast(i32 %c) !dbg !26 { |
| entry: |
| %tobool = icmp eq i32 %c, 0, !dbg !32 |
| call void @llvm.dbg.value(metadata i1 %tobool, metadata !28, metadata !DIExpression()), !dbg !32 |
| br i1 %tobool, label %if.else, label %if.then, !dbg !33 |
| |
| if.then: ; preds = %entry |
| %v42 = inttoptr i32 42 to i8*, !dbg !34 |
| call void @llvm.dbg.value(metadata i8* %v42, metadata !29, metadata !DIExpression()), !dbg !34 |
| br label %if.end, !dbg !35 |
| |
| if.else: ; preds = %entry |
| %v1 = inttoptr i32 1 to i8*, !dbg !36 |
| call void @llvm.dbg.value(metadata i8* %v1, metadata !30, metadata !DIExpression()), !dbg !36 |
| br label %if.end, !dbg !37 |
| |
| if.end: ; preds = %if.else, %if.then |
| %r.0 = phi i8* [ %v42, %if.then ], [ %v1, %if.else ], !dbg !38 |
| call void @llvm.dbg.value(metadata i8* %r.0, metadata !31, metadata !DIExpression()), !dbg !38 |
| ret i8* %r.0, !dbg !39 |
| } |
| |
| ; CHECK-LABEL: phi_const_cast: |
| ; CHECK: # %entry |
| ; CHECK: cmpl $0, |
| ; CHECK: # %if.then |
| ; CHECK: movl $42, %[[REG:[a-z]+]] |
| ; CHECK: #DEBUG_VALUE: phi_const_cast:4 <- $[[REG]] |
| ; CHECK: jmp |
| ; CHECK: # %if.else |
| ; CHECK: movl $1, %[[REG:[a-z]+]] |
| ; CHECK: #DEBUG_VALUE: phi_const_cast:5 <- $[[REG]] |
| ; CHECK: # %if.end |
| |
| declare void @may_throw() local_unnamed_addr #1 |
| |
| declare i32 @__gxx_personality_v0(...) |
| |
| define i32 @invoke_phi() personality i32 (...)* @__gxx_personality_v0 { |
| entry: |
| store i32 42, i32* @sink_across |
| invoke void @may_throw() |
| to label %try.cont unwind label %lpad |
| |
| lpad: ; preds = %entry |
| %0 = landingpad { i8*, i32 } |
| catch i8* null |
| store i32 42, i32* @sink_across |
| br label %try.cont |
| |
| try.cont: ; preds = %entry, %lpad |
| %r.0 = phi i32 [ 13, %entry ], [ 55, %lpad ] |
| ret i32 %r.0 |
| } |
| |
| ; The constant materialization should be *after* the stores to sink_across, but |
| ; before any EH_LABEL. |
| |
| ; CHECK-LABEL: invoke_phi: |
| ; CHECK: movl $42, sink_across |
| ; CHECK: movl $13, %{{[a-z]*}} |
| ; CHECK: .Ltmp{{.*}}: |
| ; CHECK: calll may_throw |
| ; CHECK: .Ltmp{{.*}}: |
| ; CHECK: jmp .LBB{{.*}} |
| ; CHECK: .LBB{{.*}}: # %lpad |
| ; CHECK: movl $42, sink_across |
| ; CHECK: movl $55, %{{[a-z]*}} |
| ; CHECK: .LBB{{.*}}: # %try.cont |
| ; CHECK: retl |
| |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #0 |
| |
| attributes #0 = { nounwind readnone speculatable } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.debugify = !{!3, !4} |
| !llvm.module.flags = !{!52, !53} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "../llvm/test/CodeGen/X86/sink-local-value.ll", directory: "/") |
| !2 = !{} |
| !3 = !{i32 27} |
| !4 = !{i32 8} |
| !5 = distinct !DISubprogram(name: "simple", linkageName: "simple", scope: null, file: !1, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, retainedNodes: !2) |
| !6 = !DISubroutineType(types: !2) |
| !7 = !DILocation(line: 1, column: 1, scope: !5) |
| !8 = !DILocation(line: 2, column: 1, scope: !5) |
| !9 = !DILocation(line: 3, column: 1, scope: !5) |
| !10 = distinct !DISubprogram(name: "simple_reg", linkageName: "simple_reg", scope: null, file: !1, line: 4, type: !6, isLocal: false, isDefinition: true, scopeLine: 4, isOptimized: true, unit: !0, retainedNodes: !2) |
| !11 = !DILocation(line: 4, column: 1, scope: !10) |
| !12 = !DILocation(line: 5, column: 1, scope: !10) |
| !13 = !DILocation(line: 6, column: 1, scope: !10) |
| !14 = distinct !DISubprogram(name: "phi_const", linkageName: "phi_const", scope: null, file: !1, line: 7, type: !6, isLocal: false, isDefinition: true, scopeLine: 7, isOptimized: true, unit: !0, retainedNodes: !15) |
| !15 = !{!16, !18} |
| !16 = !DILocalVariable(name: "1", scope: !14, file: !1, line: 7, type: !17) |
| !17 = !DIBasicType(name: "ty8", size: 8, encoding: DW_ATE_unsigned) |
| !18 = !DILocalVariable(name: "2", scope: !14, file: !1, line: 11, type: !19) |
| !19 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned) |
| !20 = !DILocation(line: 7, column: 1, scope: !14) |
| !21 = !DILocation(line: 8, column: 1, scope: !14) |
| !22 = !DILocation(line: 9, column: 1, scope: !14) |
| !23 = !DILocation(line: 10, column: 1, scope: !14) |
| !24 = !DILocation(line: 11, column: 1, scope: !14) |
| !25 = !DILocation(line: 12, column: 1, scope: !14) |
| !26 = distinct !DISubprogram(name: "phi_const_cast", linkageName: "phi_const_cast", scope: null, file: !1, line: 13, type: !6, isLocal: false, isDefinition: true, scopeLine: 13, isOptimized: true, unit: !0, retainedNodes: !27) |
| !27 = !{!28, !29, !30, !31} |
| !28 = !DILocalVariable(name: "3", scope: !26, file: !1, line: 13, type: !17) |
| !29 = !DILocalVariable(name: "4", scope: !26, file: !1, line: 15, type: !19) |
| !30 = !DILocalVariable(name: "5", scope: !26, file: !1, line: 17, type: !19) |
| !31 = !DILocalVariable(name: "6", scope: !26, file: !1, line: 19, type: !19) |
| !32 = !DILocation(line: 13, column: 1, scope: !26) |
| !33 = !DILocation(line: 14, column: 1, scope: !26) |
| !34 = !DILocation(line: 15, column: 1, scope: !26) |
| !35 = !DILocation(line: 16, column: 1, scope: !26) |
| !36 = !DILocation(line: 17, column: 1, scope: !26) |
| !37 = !DILocation(line: 18, column: 1, scope: !26) |
| !38 = !DILocation(line: 19, column: 1, scope: !26) |
| !39 = !DILocation(line: 20, column: 1, scope: !26) |
| !40 = distinct !DISubprogram(name: "invoke_phi", linkageName: "invoke_phi", scope: null, file: !1, line: 21, type: !6, isLocal: false, isDefinition: true, scopeLine: 21, isOptimized: true, unit: !0, retainedNodes: !41) |
| !41 = !{!42, !44} |
| !42 = !DILocalVariable(name: "7", scope: !40, file: !1, line: 23, type: !43) |
| !43 = !DIBasicType(name: "ty64", size: 64, encoding: DW_ATE_unsigned) |
| !44 = !DILocalVariable(name: "8", scope: !40, file: !1, line: 26, type: !19) |
| !45 = !DILocation(line: 21, column: 1, scope: !40) |
| !46 = !DILocation(line: 22, column: 1, scope: !40) |
| !47 = !DILocation(line: 23, column: 1, scope: !40) |
| !48 = !DILocation(line: 24, column: 1, scope: !40) |
| !49 = !DILocation(line: 25, column: 1, scope: !40) |
| !50 = !DILocation(line: 26, column: 1, scope: !40) |
| !51 = !DILocation(line: 27, column: 1, scope: !40) |
| !52 = !{i32 2, !"Dwarf Version", i32 4} |
| !53 = !{i32 2, !"Debug Info Version", i32 3} |
