diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86FrameLowering.cpp | 5 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic-2.ll | 72 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic.ll | 41 |
3 files changed, 110 insertions, 8 deletions
diff --git a/llvm/lib/Target/X86/X86FrameLowering.cpp b/llvm/lib/Target/X86/X86FrameLowering.cpp index 1deefe1231c..87355d46f9b 100644 --- a/llvm/lib/Target/X86/X86FrameLowering.cpp +++ b/llvm/lib/Target/X86/X86FrameLowering.cpp @@ -373,6 +373,10 @@ int X86FrameLowering::mergeSPUpdates(MachineBasicBlock &MBB, MachineBasicBlock::iterator PI = doMergeWithPrevious ? std::prev(MBBI) : MBBI; MachineBasicBlock::iterator NI = doMergeWithPrevious ? nullptr : std::next(MBBI); + PI = skipDebugInstructionsBackward(PI, MBB.begin()); + if (NI != nullptr) + NI = skipDebugInstructionsForward(NI, MBB.end()); + unsigned Opc = PI->getOpcode(); int Offset = 0; @@ -2586,6 +2590,7 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, uint64_t Amount = !reserveCallFrame ? I->getOperand(0).getImm() : 0; uint64_t InternalAmt = (isDestroy || Amount) ? I->getOperand(1).getImm() : 0; I = MBB.erase(I); + I = skipDebugInstructionsForward(I, MBB.end()); if (!reserveCallFrame) { // If the stack pointer can be changed after prologue, turn the diff --git a/llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic-2.ll b/llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic-2.ll new file mode 100644 index 00000000000..ab797e04b40 --- /dev/null +++ b/llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic-2.ll @@ -0,0 +1,72 @@ +; Test ensuring debug intrinsics do not affect generated function prologue. +; +; RUN: llc -O1 -mtriple=x86_64-unknown-unknown -o - %s | FileCheck %s + +@a = local_unnamed_addr global i64 0, align 8 + +define void @noDebug() { +entry: + %0 = load i64, i64* @a, align 8 + %1 = load i64, i64* @a, align 8 + %2 = load i64, i64* @a, align 8 + %3 = tail call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %0, i64 %1) + %4 = extractvalue { i64, i1 } %3, 0 + %5 = tail call i64 @fn1(i64 %4, i64 %2) + tail call void (...) @printf() + tail call void (...) @printf(i64 1, i64 2, i64 3, i64 4, i32 0, i64 0, i64 %4, i64 %5) + ret void +} + +; CHECK-LABEL: noDebug +; CHECK: addq $24, %rsp +; CHECK: popq %rbx +; CHECK-NEXT: popq %r14 +; CHECK-NEXT: retq + + +define void @withDebug() !dbg !18 { +entry: + %0 = load i64, i64* @a, align 8 + %1 = load i64, i64* @a, align 8 + %2 = load i64, i64* @a, align 8 + %3 = tail call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %0, i64 %1) + %4 = extractvalue { i64, i1 } %3, 0 + %5 = tail call i64 @fn1(i64 %4, i64 %2) + tail call void @llvm.dbg.value(metadata i64 %4, i64 0, metadata !23, metadata !33), !dbg !34 + tail call void @llvm.dbg.value(metadata i64 %5, i64 0, metadata !22, metadata !33), !dbg !35 + tail call void (...) @printf() + tail call void (...) @printf(i64 1, i64 2, i64 3, i64 4, i32 0, i64 0, i64 %4, i64 %5) + ret void +} + +; CHECK-LABEL: withDebug +; CHECK: #DEBUG_VALUE: test:j <- %RBX +; CHECK-NEXT: addq $24, %rsp +; CHECK: popq %rbx +; CHECK-NEXT: popq %r14 +; CHECK-NEXT: retq + +declare { i64, i1 } @llvm.uadd.with.overflow.i64(i64, i64) +declare i64 @fn1(i64, i64) + +declare void @printf(...) + +declare void @llvm.dbg.value(metadata, i64, metadata, metadata) + + +!llvm.dbg.cu = !{!1} +!llvm.module.flags = !{!15, !16} + +!1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 4.0.0") +!2 = !DIFile(filename: "test.cpp", directory: "") +!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed) +!15 = !{i32 2, !"Dwarf Version", i32 4} +!16 = !{i32 2, !"Debug Info Version", i32 3} +!18 = distinct !DISubprogram(name: "test", scope: !2, file: !2, line: 5, unit: !1) +!22 = !DILocalVariable(name: "i", scope: !18, file: !2, line: 6, type: !11) +!23 = !DILocalVariable(name: "j", scope: !18, file: !2, line: 7, type: !11) +!33 = !DIExpression() +!34 = !DILocation(line: 7, column: 17, scope: !18) +!35 = !DILocation(line: 6, column: 8, scope: !18) +!36 = !DILocation(line: 9, column: 3, scope: !18) +!37 = !DILocation(line: 10, column: 10, scope: !18) diff --git a/llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic.ll b/llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic.ll index 8614d1b4c6c..e86d094ac34 100644 --- a/llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic.ll +++ b/llvm/test/CodeGen/X86/frame-lowering-debug-intrinsic.ll @@ -2,31 +2,56 @@ ; ; RUN: llc -O1 -mtriple=x86_64-unknown-unknown -o - %s | FileCheck %s - -define i64 @noDebug(i64 %a) { +define i64 @fn1NoDebug(i64 %a) { %call = call i64 @fn(i64 %a, i64 0) ret i64 %call } -; CHECK-LABEL: noDebug +; CHECK-LABEL: fn1NoDebug ; CHECK: popq %rcx -; CHECK: ret - +; CHECK-NEXT: ret -define i64 @withDebug(i64 %a) !dbg !4 { +define i64 @fn1WithDebug(i64 %a) !dbg !4 { %call = call i64 @fn(i64 %a, i64 0) tail call void @llvm.dbg.value(metadata i64 %call, i64 0, metadata !5, metadata !6), !dbg !7 ret i64 %call } -; CHECK-LABEL: withDebug +; CHECK-LABEL: fn1WithDebug ; CHECK: popq %rcx -; CHECK: ret +; CHECK-NEXT: ret + +%struct.Buffer = type { i8, [63 x i8] } + +define void @fn2NoDebug(%struct.Buffer* byval align 64 %p1) { + ret void +} + +; CHECK-LABEL: fn2NoDebug +; CHECK: and +; CHECK-NOT: add +; CHECK-NOT: sub +; CHECK: mov +; CHECK-NEXT: pop +; CHECK-NEXT: ret + +define void @fn2WithDebug(%struct.Buffer* byval align 64 %p1) !dbg !4 { + call void @llvm.dbg.declare(metadata %struct.Buffer* %p1, metadata !5, metadata !6), !dbg !7 + ret void +} +; CHECK-LABEL: fn2WithDebug +; CHECK: and +; CHECK-NOT: add +; CHECK-NOT: sub +; CHECK: mov +; CHECK-NEXT: pop +; CHECK-NEXT: ret declare i64 @fn(i64, i64) declare void @llvm.dbg.value(metadata, i64, metadata, metadata) +declare void @llvm.dbg.declare(metadata, metadata, metadata) !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!2,!3} |
