36c64af9d7
If we are going to write handler data (that is written as variable length data following after the unwind info in .xdata), we need to emit the handler data immediately, but for cases where no such info is going to be written, skip emitting it right away. (Unwind info for all remaining functions that hasn't gotten it emitted directly is emitted at the end.) This does slightly change the ordering of sections (triggering a bunch of updates to DebugInfo/COFF tests), but the change should be benign. This also matches GCC's assembly output, which doesn't output .seh_handlerdata unless it actually is needed. For ARM64, the unwind info can be packed into the runtime function entry itself (leaving no data in the .xdata section at all), but that can only be done if there's no follow-on data in the .xdata section. If emission of the unwind info is triggered via EmitWinEHHandlerData (or the .seh_handlerdata directive), which implicitly switches to the .xdata section, there's a chance of the caller wanting to pass further data there, so the packed format can't be used in that case. Differential Revision: https://reviews.llvm.org/D87448
400 lines
16 KiB
LLVM
400 lines
16 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs < %s -enable-tail-merge=0 -mtriple=x86_64-linux | FileCheck %s --check-prefix=LINUX
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; RUN: llc -verify-machineinstrs < %s -enable-tail-merge=0 -mtriple=x86_64-linux-gnux32 | FileCheck %s --check-prefix=LINUX-X32
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; RUN: llc -verify-machineinstrs < %s -enable-tail-merge=0 -mtriple=x86_64-windows | FileCheck %s --check-prefix=WINDOWS
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; RUN: llc -verify-machineinstrs < %s -enable-tail-merge=0 -mtriple=i686-windows | FileCheck %s --check-prefix=X86 --check-prefix=X86-NOSSE
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; RUN: llc -verify-machineinstrs < %s -enable-tail-merge=0 -mtriple=i686-windows -mattr=+sse2 | FileCheck %s --check-prefix=X86 --check-prefix=X86-SSE
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; Test that we actually spill and reload all arguments in the variadic argument
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; pack. Doing a normal call will clobber all argument registers, and we will
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; spill around it. A simple adjustment should not require any XMM spills.
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declare void @llvm.va_start(i8*) nounwind
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declare void(i8*, ...)* @get_f(i8* %this)
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define void @f_thunk(i8* %this, ...) {
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; Use va_start so that we exercise the combination.
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; LINUX-LABEL: f_thunk:
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; LINUX: # %bb.0:
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; LINUX-NEXT: pushq %rbp
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; LINUX-NEXT: .cfi_def_cfa_offset 16
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; LINUX-NEXT: pushq %r15
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; LINUX-NEXT: .cfi_def_cfa_offset 24
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; LINUX-NEXT: pushq %r14
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; LINUX-NEXT: .cfi_def_cfa_offset 32
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; LINUX-NEXT: pushq %r13
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; LINUX-NEXT: .cfi_def_cfa_offset 40
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; LINUX-NEXT: pushq %r12
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; LINUX-NEXT: .cfi_def_cfa_offset 48
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; LINUX-NEXT: pushq %rbx
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; LINUX-NEXT: .cfi_def_cfa_offset 56
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; LINUX-NEXT: subq $360, %rsp # imm = 0x168
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; LINUX-NEXT: .cfi_def_cfa_offset 416
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; LINUX-NEXT: .cfi_offset %rbx, -56
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; LINUX-NEXT: .cfi_offset %r12, -48
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; LINUX-NEXT: .cfi_offset %r13, -40
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; LINUX-NEXT: .cfi_offset %r14, -32
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; LINUX-NEXT: .cfi_offset %r15, -24
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; LINUX-NEXT: .cfi_offset %rbp, -16
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; LINUX-NEXT: movq %r9, %r15
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; LINUX-NEXT: movq %r8, %r12
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; LINUX-NEXT: movq %rcx, %r13
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; LINUX-NEXT: movq %rdx, %rbp
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; LINUX-NEXT: movq %rsi, %rbx
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; LINUX-NEXT: movq %rdi, %r14
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; LINUX-NEXT: movb %al, {{[-0-9]+}}(%r{{[sb]}}p) # 1-byte Spill
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; LINUX-NEXT: testb %al, %al
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; LINUX-NEXT: je .LBB0_2
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; LINUX-NEXT: # %bb.1:
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; LINUX-NEXT: movaps %xmm0, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movaps %xmm1, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movaps %xmm2, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movaps %xmm3, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movaps %xmm4, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movaps %xmm5, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movaps %xmm6, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movaps %xmm7, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: .LBB0_2:
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; LINUX-NEXT: movq %rbx, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movq %rbp, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movq %r13, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movq %r12, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movq %r15, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: leaq {{[0-9]+}}(%rsp), %rax
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; LINUX-NEXT: movq %rax, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: leaq {{[0-9]+}}(%rsp), %rax
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; LINUX-NEXT: movq %rax, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movabsq $206158430216, %rax # imm = 0x3000000008
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; LINUX-NEXT: movq %rax, {{[0-9]+}}(%rsp)
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; LINUX-NEXT: movq %r14, %rdi
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; LINUX-NEXT: movaps %xmm7, {{[-0-9]+}}(%r{{[sb]}}p) # 16-byte Spill
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; LINUX-NEXT: movaps %xmm6, {{[-0-9]+}}(%r{{[sb]}}p) # 16-byte Spill
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; LINUX-NEXT: movaps %xmm5, {{[-0-9]+}}(%r{{[sb]}}p) # 16-byte Spill
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; LINUX-NEXT: movaps %xmm4, {{[-0-9]+}}(%r{{[sb]}}p) # 16-byte Spill
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; LINUX-NEXT: movaps %xmm3, {{[-0-9]+}}(%r{{[sb]}}p) # 16-byte Spill
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; LINUX-NEXT: movaps %xmm2, {{[-0-9]+}}(%r{{[sb]}}p) # 16-byte Spill
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; LINUX-NEXT: movaps %xmm1, {{[-0-9]+}}(%r{{[sb]}}p) # 16-byte Spill
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; LINUX-NEXT: movaps %xmm0, {{[-0-9]+}}(%r{{[sb]}}p) # 16-byte Spill
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; LINUX-NEXT: callq get_f
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; LINUX-NEXT: movq %rax, %r11
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; LINUX-NEXT: movq %r14, %rdi
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; LINUX-NEXT: movq %rbx, %rsi
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; LINUX-NEXT: movq %rbp, %rdx
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; LINUX-NEXT: movq %r13, %rcx
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; LINUX-NEXT: movq %r12, %r8
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; LINUX-NEXT: movq %r15, %r9
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; LINUX-NEXT: movaps {{[-0-9]+}}(%r{{[sb]}}p), %xmm0 # 16-byte Reload
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; LINUX-NEXT: movaps {{[-0-9]+}}(%r{{[sb]}}p), %xmm1 # 16-byte Reload
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; LINUX-NEXT: movaps {{[-0-9]+}}(%r{{[sb]}}p), %xmm2 # 16-byte Reload
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; LINUX-NEXT: movaps {{[-0-9]+}}(%r{{[sb]}}p), %xmm3 # 16-byte Reload
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; LINUX-NEXT: movaps {{[-0-9]+}}(%r{{[sb]}}p), %xmm4 # 16-byte Reload
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; LINUX-NEXT: movaps {{[-0-9]+}}(%r{{[sb]}}p), %xmm5 # 16-byte Reload
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; LINUX-NEXT: movaps {{[-0-9]+}}(%r{{[sb]}}p), %xmm6 # 16-byte Reload
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; LINUX-NEXT: movaps {{[-0-9]+}}(%r{{[sb]}}p), %xmm7 # 16-byte Reload
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; LINUX-NEXT: movb {{[-0-9]+}}(%r{{[sb]}}p), %al # 1-byte Reload
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; LINUX-NEXT: addq $360, %rsp # imm = 0x168
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; LINUX-NEXT: .cfi_def_cfa_offset 56
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; LINUX-NEXT: popq %rbx
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; LINUX-NEXT: .cfi_def_cfa_offset 48
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; LINUX-NEXT: popq %r12
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; LINUX-NEXT: .cfi_def_cfa_offset 40
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; LINUX-NEXT: popq %r13
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; LINUX-NEXT: .cfi_def_cfa_offset 32
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; LINUX-NEXT: popq %r14
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; LINUX-NEXT: .cfi_def_cfa_offset 24
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; LINUX-NEXT: popq %r15
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; LINUX-NEXT: .cfi_def_cfa_offset 16
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; LINUX-NEXT: popq %rbp
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; LINUX-NEXT: .cfi_def_cfa_offset 8
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; LINUX-NEXT: jmpq *%r11 # TAILCALL
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;
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; LINUX-X32-LABEL: f_thunk:
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; LINUX-X32: # %bb.0:
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; LINUX-X32-NEXT: pushq %rbp
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 16
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; LINUX-X32-NEXT: pushq %r15
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 24
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; LINUX-X32-NEXT: pushq %r14
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 32
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; LINUX-X32-NEXT: pushq %r13
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 40
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; LINUX-X32-NEXT: pushq %r12
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 48
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; LINUX-X32-NEXT: pushq %rbx
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 56
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; LINUX-X32-NEXT: subl $344, %esp # imm = 0x158
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 400
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; LINUX-X32-NEXT: .cfi_offset %rbx, -56
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; LINUX-X32-NEXT: .cfi_offset %r12, -48
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; LINUX-X32-NEXT: .cfi_offset %r13, -40
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; LINUX-X32-NEXT: .cfi_offset %r14, -32
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; LINUX-X32-NEXT: .cfi_offset %r15, -24
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; LINUX-X32-NEXT: .cfi_offset %rbp, -16
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; LINUX-X32-NEXT: movq %r9, %r15
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; LINUX-X32-NEXT: movq %r8, %r12
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; LINUX-X32-NEXT: movq %rcx, %r13
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; LINUX-X32-NEXT: movq %rdx, %rbp
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; LINUX-X32-NEXT: movq %rsi, %rbx
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; LINUX-X32-NEXT: movl %edi, %r14d
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; LINUX-X32-NEXT: movb %al, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Spill
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; LINUX-X32-NEXT: testb %al, %al
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; LINUX-X32-NEXT: je .LBB0_2
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; LINUX-X32-NEXT: # %bb.1:
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; LINUX-X32-NEXT: movaps %xmm0, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movaps %xmm1, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movaps %xmm2, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movaps %xmm3, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movaps %xmm4, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movaps %xmm5, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movaps %xmm6, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movaps %xmm7, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: .LBB0_2:
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; LINUX-X32-NEXT: movq %rbx, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movq %rbp, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movq %r13, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movq %r12, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movq %r15, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: leal {{[0-9]+}}(%rsp), %eax
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; LINUX-X32-NEXT: movl %eax, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: leal {{[0-9]+}}(%rsp), %eax
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; LINUX-X32-NEXT: movl %eax, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movabsq $206158430216, %rax # imm = 0x3000000008
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; LINUX-X32-NEXT: movq %rax, {{[0-9]+}}(%esp)
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; LINUX-X32-NEXT: movl %r14d, %edi
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; LINUX-X32-NEXT: movaps %xmm7, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; LINUX-X32-NEXT: movaps %xmm6, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; LINUX-X32-NEXT: movaps %xmm5, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; LINUX-X32-NEXT: movaps %xmm4, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; LINUX-X32-NEXT: movaps %xmm3, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; LINUX-X32-NEXT: movaps %xmm2, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; LINUX-X32-NEXT: movaps %xmm1, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; LINUX-X32-NEXT: movaps %xmm0, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; LINUX-X32-NEXT: callq get_f
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; LINUX-X32-NEXT: movl %eax, %r11d
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; LINUX-X32-NEXT: movl %r14d, %edi
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; LINUX-X32-NEXT: movq %rbx, %rsi
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; LINUX-X32-NEXT: movq %rbp, %rdx
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; LINUX-X32-NEXT: movq %r13, %rcx
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; LINUX-X32-NEXT: movq %r12, %r8
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; LINUX-X32-NEXT: movq %r15, %r9
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; LINUX-X32-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm0 # 16-byte Reload
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; LINUX-X32-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm1 # 16-byte Reload
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; LINUX-X32-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm2 # 16-byte Reload
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; LINUX-X32-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm3 # 16-byte Reload
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; LINUX-X32-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm4 # 16-byte Reload
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; LINUX-X32-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm5 # 16-byte Reload
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; LINUX-X32-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm6 # 16-byte Reload
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; LINUX-X32-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm7 # 16-byte Reload
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; LINUX-X32-NEXT: movb {{[-0-9]+}}(%e{{[sb]}}p), %al # 1-byte Reload
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; LINUX-X32-NEXT: addl $344, %esp # imm = 0x158
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 56
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; LINUX-X32-NEXT: popq %rbx
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 48
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; LINUX-X32-NEXT: popq %r12
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 40
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; LINUX-X32-NEXT: popq %r13
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 32
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; LINUX-X32-NEXT: popq %r14
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 24
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; LINUX-X32-NEXT: popq %r15
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 16
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; LINUX-X32-NEXT: popq %rbp
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; LINUX-X32-NEXT: .cfi_def_cfa_offset 8
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; LINUX-X32-NEXT: jmpq *%r11 # TAILCALL
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;
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; WINDOWS-LABEL: f_thunk:
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; WINDOWS: # %bb.0:
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; WINDOWS-NEXT: pushq %r14
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; WINDOWS-NEXT: .seh_pushreg %r14
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; WINDOWS-NEXT: pushq %rsi
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; WINDOWS-NEXT: .seh_pushreg %rsi
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; WINDOWS-NEXT: pushq %rdi
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; WINDOWS-NEXT: .seh_pushreg %rdi
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; WINDOWS-NEXT: pushq %rbx
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; WINDOWS-NEXT: .seh_pushreg %rbx
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; WINDOWS-NEXT: subq $72, %rsp
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; WINDOWS-NEXT: .seh_stackalloc 72
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; WINDOWS-NEXT: .seh_endprologue
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; WINDOWS-NEXT: movq %r9, %r14
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; WINDOWS-NEXT: movq %r8, %rdi
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; WINDOWS-NEXT: movq %rdx, %rbx
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; WINDOWS-NEXT: movq %rcx, %rsi
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; WINDOWS-NEXT: movq %rdx, {{[0-9]+}}(%rsp)
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; WINDOWS-NEXT: movq %r8, {{[0-9]+}}(%rsp)
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; WINDOWS-NEXT: movq %r9, {{[0-9]+}}(%rsp)
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; WINDOWS-NEXT: leaq {{[0-9]+}}(%rsp), %rax
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; WINDOWS-NEXT: movq %rax, {{[0-9]+}}(%rsp)
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; WINDOWS-NEXT: callq get_f
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; WINDOWS-NEXT: movq %rsi, %rcx
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; WINDOWS-NEXT: movq %rbx, %rdx
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; WINDOWS-NEXT: movq %rdi, %r8
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; WINDOWS-NEXT: movq %r14, %r9
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; WINDOWS-NEXT: addq $72, %rsp
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; WINDOWS-NEXT: popq %rbx
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; WINDOWS-NEXT: popq %rdi
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; WINDOWS-NEXT: popq %rsi
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; WINDOWS-NEXT: popq %r14
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; WINDOWS-NEXT: rex64 jmpq *%rax # TAILCALL
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; WINDOWS-NEXT: .seh_endproc
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;
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; X86-NOSSE-LABEL: f_thunk:
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; X86-NOSSE: # %bb.0:
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; X86-NOSSE-NEXT: pushl %ebp
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; X86-NOSSE-NEXT: movl %esp, %ebp
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; X86-NOSSE-NEXT: pushl %esi
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; X86-NOSSE-NEXT: andl $-16, %esp
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; X86-NOSSE-NEXT: subl $32, %esp
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; X86-NOSSE-NEXT: movl 8(%ebp), %esi
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; X86-NOSSE-NEXT: leal 12(%ebp), %eax
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; X86-NOSSE-NEXT: movl %eax, (%esp)
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; X86-NOSSE-NEXT: pushl %esi
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; X86-NOSSE-NEXT: calll _get_f
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; X86-NOSSE-NEXT: addl $4, %esp
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; X86-NOSSE-NEXT: movl %esi, 8(%ebp)
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; X86-NOSSE-NEXT: leal -4(%ebp), %esp
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; X86-NOSSE-NEXT: popl %esi
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; X86-NOSSE-NEXT: popl %ebp
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; X86-NOSSE-NEXT: jmpl *%eax # TAILCALL
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;
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; X86-SSE-LABEL: f_thunk:
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; X86-SSE: # %bb.0:
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; X86-SSE-NEXT: pushl %ebp
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; X86-SSE-NEXT: movl %esp, %ebp
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; X86-SSE-NEXT: pushl %esi
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; X86-SSE-NEXT: andl $-16, %esp
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; X86-SSE-NEXT: subl $80, %esp
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; X86-SSE-NEXT: movaps %xmm2, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; X86-SSE-NEXT: movaps %xmm1, {{[-0-9]+}}(%e{{[sb]}}p) # 16-byte Spill
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; X86-SSE-NEXT: movaps %xmm0, (%esp) # 16-byte Spill
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; X86-SSE-NEXT: movl 8(%ebp), %esi
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; X86-SSE-NEXT: leal 12(%ebp), %eax
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; X86-SSE-NEXT: movl %eax, {{[0-9]+}}(%esp)
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; X86-SSE-NEXT: pushl %esi
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; X86-SSE-NEXT: calll _get_f
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; X86-SSE-NEXT: addl $4, %esp
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; X86-SSE-NEXT: movl %esi, 8(%ebp)
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; X86-SSE-NEXT: movaps (%esp), %xmm0 # 16-byte Reload
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; X86-SSE-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm1 # 16-byte Reload
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; X86-SSE-NEXT: movaps {{[-0-9]+}}(%e{{[sb]}}p), %xmm2 # 16-byte Reload
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; X86-SSE-NEXT: leal -4(%ebp), %esp
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; X86-SSE-NEXT: popl %esi
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; X86-SSE-NEXT: popl %ebp
|
|
; X86-SSE-NEXT: jmpl *%eax # TAILCALL
|
|
%ap = alloca [4 x i8*], align 16
|
|
%ap_i8 = bitcast [4 x i8*]* %ap to i8*
|
|
call void @llvm.va_start(i8* %ap_i8)
|
|
|
|
%fptr = call void(i8*, ...)*(i8*) @get_f(i8* %this)
|
|
musttail call void (i8*, ...) %fptr(i8* %this, ...)
|
|
ret void
|
|
}
|
|
|
|
; Save and restore 6 GPRs, 8 XMMs, and AL around the call.
|
|
|
|
; No regparms on normal x86 conventions.
|
|
|
|
; This thunk shouldn't require any spills and reloads, assuming the register
|
|
; allocator knows what it's doing.
|
|
|
|
define void @g_thunk(i8* %fptr_i8, ...) {
|
|
; LINUX-LABEL: g_thunk:
|
|
; LINUX: # %bb.0:
|
|
; LINUX-NEXT: jmpq *%rdi # TAILCALL
|
|
;
|
|
; LINUX-X32-LABEL: g_thunk:
|
|
; LINUX-X32: # %bb.0:
|
|
; LINUX-X32-NEXT: movl %edi, %r11d
|
|
; LINUX-X32-NEXT: jmpq *%r11 # TAILCALL
|
|
;
|
|
; WINDOWS-LABEL: g_thunk:
|
|
; WINDOWS: # %bb.0:
|
|
; WINDOWS-NEXT: rex64 jmpq *%rcx # TAILCALL
|
|
;
|
|
; X86-LABEL: g_thunk:
|
|
; X86: # %bb.0:
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
|
; X86-NEXT: movl %eax, {{[0-9]+}}(%esp)
|
|
; X86-NEXT: jmpl *%eax # TAILCALL
|
|
%fptr = bitcast i8* %fptr_i8 to void (i8*, ...)*
|
|
musttail call void (i8*, ...) %fptr(i8* %fptr_i8, ...)
|
|
ret void
|
|
}
|
|
|
|
; Do a simple multi-exit multi-bb test.
|
|
|
|
%struct.Foo = type { i1, i8*, i8* }
|
|
|
|
@g = external global i32
|
|
|
|
define void @h_thunk(%struct.Foo* %this, ...) {
|
|
; LINUX-LABEL: h_thunk:
|
|
; LINUX: # %bb.0:
|
|
; LINUX-NEXT: cmpb $1, (%rdi)
|
|
; LINUX-NEXT: jne .LBB2_2
|
|
; LINUX-NEXT: # %bb.1: # %then
|
|
; LINUX-NEXT: movq 8(%rdi), %r11
|
|
; LINUX-NEXT: jmpq *%r11 # TAILCALL
|
|
; LINUX-NEXT: .LBB2_2: # %else
|
|
; LINUX-NEXT: movq 16(%rdi), %r11
|
|
; LINUX-NEXT: movl $42, {{.*}}(%rip)
|
|
; LINUX-NEXT: jmpq *%r11 # TAILCALL
|
|
;
|
|
; LINUX-X32-LABEL: h_thunk:
|
|
; LINUX-X32: # %bb.0:
|
|
; LINUX-X32-NEXT: cmpb $1, (%edi)
|
|
; LINUX-X32-NEXT: jne .LBB2_2
|
|
; LINUX-X32-NEXT: # %bb.1: # %then
|
|
; LINUX-X32-NEXT: movl 4(%edi), %r11d
|
|
; LINUX-X32-NEXT: jmpq *%r11 # TAILCALL
|
|
; LINUX-X32-NEXT: .LBB2_2: # %else
|
|
; LINUX-X32-NEXT: movl 8(%edi), %r11d
|
|
; LINUX-X32-NEXT: movl $42, {{.*}}(%rip)
|
|
; LINUX-X32-NEXT: jmpq *%r11 # TAILCALL
|
|
;
|
|
; WINDOWS-LABEL: h_thunk:
|
|
; WINDOWS: # %bb.0:
|
|
; WINDOWS-NEXT: cmpb $1, (%rcx)
|
|
; WINDOWS-NEXT: jne .LBB2_2
|
|
; WINDOWS-NEXT: # %bb.1: # %then
|
|
; WINDOWS-NEXT: movq 8(%rcx), %rax
|
|
; WINDOWS-NEXT: rex64 jmpq *%rax # TAILCALL
|
|
; WINDOWS-NEXT: .LBB2_2: # %else
|
|
; WINDOWS-NEXT: movq 16(%rcx), %rax
|
|
; WINDOWS-NEXT: movl $42, {{.*}}(%rip)
|
|
; WINDOWS-NEXT: rex64 jmpq *%rax # TAILCALL
|
|
;
|
|
; X86-LABEL: h_thunk:
|
|
; X86: # %bb.0:
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
|
; X86-NEXT: cmpb $1, (%eax)
|
|
; X86-NEXT: jne LBB2_2
|
|
; X86-NEXT: # %bb.1: # %then
|
|
; X86-NEXT: movl 4(%eax), %ecx
|
|
; X86-NEXT: movl %eax, {{[0-9]+}}(%esp)
|
|
; X86-NEXT: jmpl *%ecx # TAILCALL
|
|
; X86-NEXT: LBB2_2: # %else
|
|
; X86-NEXT: movl 8(%eax), %ecx
|
|
; X86-NEXT: movl $42, _g
|
|
; X86-NEXT: movl %eax, {{[0-9]+}}(%esp)
|
|
; X86-NEXT: jmpl *%ecx # TAILCALL
|
|
%cond_p = getelementptr %struct.Foo, %struct.Foo* %this, i32 0, i32 0
|
|
%cond = load i1, i1* %cond_p
|
|
br i1 %cond, label %then, label %else
|
|
|
|
then:
|
|
%a_p = getelementptr %struct.Foo, %struct.Foo* %this, i32 0, i32 1
|
|
%a_i8 = load i8*, i8** %a_p
|
|
%a = bitcast i8* %a_i8 to void (%struct.Foo*, ...)*
|
|
musttail call void (%struct.Foo*, ...) %a(%struct.Foo* %this, ...)
|
|
ret void
|
|
|
|
else:
|
|
%b_p = getelementptr %struct.Foo, %struct.Foo* %this, i32 0, i32 2
|
|
%b_i8 = load i8*, i8** %b_p
|
|
%b = bitcast i8* %b_i8 to void (%struct.Foo*, ...)*
|
|
store i32 42, i32* @g
|
|
musttail call void (%struct.Foo*, ...) %b(%struct.Foo* %this, ...)
|
|
ret void
|
|
}
|