llvmbot
commented
15 years ago This seems to have been fixed at some point.
Closed edwintorok closed 15 years ago
llvmbot
commented
15 years ago This seems to have been fixed at some point.
Extended Description
Due to my recent change for #3402, it is now possible to use -mattr=-sse on x86-64. However in some cases this causes assertion failures in codegen (all ok with defaults, and -m32):
Testcase: $ llc -march=x86-64 x.bc -f -mattr=-sse target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" target triple = "x86_64-unknown-linux-gnu"
define void @acpi_os_printf(i8 %fmt, ...) nounwind optsize { entry: ret void } llc: /home/edwin/llvm-bootstrap/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp:358: void llvm::DAGTypeLegalizer::SplitVectorResult(llvm::SDNode, unsigned int): Assertion `0 && "Do not know how to split the result of this operator!"' failed. 0 llc 0x0000000000c6e99f 1 libc.so.6 0x00007fac0e79df60 2 libc.so.6 0x00007fac0e79ded5 gsignal + 53 3 libc.so.6 0x00007fac0e79f3f3 abort + 387 4 libc.so.6 0x00007fac0e796dc9 __assert_fail + 233 5 llc 0x00000000009e50aa 6 llc 0x00000000009d6c2d 7 llc 0x00000000009d76cf llvm::SelectionDAG::LegalizeTypes() + 847 8 llc 0x0000000000973528 llvm::SelectionDAGISel::CodeGenAndEmitDAG() + 568 9 llc 0x0000000000975612 llvm::SelectionDAGISel::SelectBasicBlock(llvm::BasicBlock, llvm::ilist_iterator, llvm::ilist_iterator) + 562
10 llc 0x0000000000975a0c llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function&, llvm::MachineFunction&, llvm::MachineModuleInfo , llvm::DwarfWriter*, llvm::TargetInstrInfo const&) + 748
11 llc 0x0000000000976f9e llvm::SelectionDAGISel::runOnFunction(llvm::Function&) + 1214
12 llc 0x0000000000c0a2fb llvm::FPPassManager::runOnFunction(llvm::Function&) + 347
13 llc 0x0000000000c0a6f6 llvm::FunctionPassManagerImpl::run(llvm::Function&) + 134
14 llc 0x0000000000c0a87e llvm::FunctionPassManager::run(llvm::Function&) + 62
15 llc 0x00000000004fbc31 main + 4193
16 libc.so.6 0x00007fac0e78a1a6 __libc_start_main + 230
17 llc 0x00000000004fa129 std::ios_base::Init::~Init() + 57
Aborted
Without -mattr=-sse, llc generates this: acpi_os_printf: subq $184, %rsp movaps %xmm7, 160(%rsp) movaps %xmm6, 144(%rsp) movaps %xmm5, 128(%rsp) movaps %xmm4, 112(%rsp) movaps %xmm3, 96(%rsp) movaps %xmm2, 80(%rsp) movaps %xmm1, 64(%rsp) movaps %xmm0, 48(%rsp) movq %r9, 40(%rsp) movq %r8, 32(%rsp) movq %rcx, 24(%rsp) movq %rdx, 16(%rsp) movq %rsi, 8(%rsp) addq $184, %rsp ret
gcc generates this: $ gcc x.c -S -o - -m64 -mno-sse acpi_os_printf: .LFB2: pushq %rbp .LCFI0: movq %rsp, %rbp .LCFI1: subq $72, %rsp .LCFI2: movq %rsi, -168(%rbp) movq %rdx, -160(%rbp) movq %rcx, -152(%rbp) movq %r8, -144(%rbp) movq %r9, -136(%rbp) movq %rdi, -184(%rbp) leave ret
Or with -O1: acpi_os_printf: .LFB2: rep ret
To reproduce with llvm-gcc: / testcase / void acpi_os_printf(unsigned char* fmt, ...) { }
$ llvm-gcc x.c -S -o - -m64 -mno-sse .ident "GCC: (GNU) 4.2.1 (Based on Apple Inc. build 5636) (LLVM build)" SplitVectorResult #0: 0x2772730: v4f32 = Register #1038 cc1: /home/edwin/llvm-bootstrap/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp:358: void llvm::DAGTypeLegalizer::SplitVectorResult(llvm::SDNode*, unsigned int): Assertion `0 && "Do not know how to split the result of this operator!"' failed. x.c:2: internal compiler error: Aborted Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://developer.apple.com/bugreporter> for instructions.