5d070c8259
When back-deploying Swift async code we can't always toggle the flag showing an extended frame is present because it will confuse unwinders on systems released before this feature. So in cases where the code might run there, we `or` in a mask provided by the runtime (as an absolute symbol) telling us whether the unwinders can cope. When deploying only for newer OSs, we can still hard-code the bit-set for greater efficiency.
112 lines
2.6 KiB
LLVM
112 lines
2.6 KiB
LLVM
; RUN: llc -mtriple=x86_64-apple-macosx12.0 %s -o - | FileCheck %s
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; RUN: llc -mtriple=i686-apple-darwin %s -o - | FileCheck %s --check-prefix=CHECK-32
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define void @simple(i8* swiftasync %ctx) "frame-pointer"="all" {
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; CHECK-LABEL: simple:
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; CHECK: btsq $60, %rbp
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; CHECK: pushq %rbp
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; CHECK: pushq %r14
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; CHECK: leaq 8(%rsp), %rbp
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; CHECK: pushq
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; [...]
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; CHECK: addq $16, %rsp
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; CHECK: popq %rbp
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; CHECK: btrq $60, %rbp
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; CHECK: retq
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; CHECK-32-LABEL: simple:
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; CHECK-32: movl 8(%ebp), [[TMP:%.*]]
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; CHECK-32: movl [[TMP]], {{.*}}(%ebp)
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ret void
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}
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define void @more_csrs(i8* swiftasync %ctx) "frame-pointer"="all" {
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; CHECK-LABEL: more_csrs:
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; CHECK: btsq $60, %rbp
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; CHECK: pushq %rbp
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; CHECK: .cfi_offset %rbp, -16
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; CHECK: pushq %r14
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; CHECK: leaq 8(%rsp), %rbp
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; CHECK: subq $8, %rsp
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; CHECK: pushq %r15
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; CHECK: .cfi_offset %r15, -40
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; [...]
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; CHECK: popq %r15
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; CHECK: addq $16, %rsp
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; CHECK: popq %rbp
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; CHECK: btrq $60, %rbp
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; CHECK: retq
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call void asm sideeffect "", "~{r15}"()
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ret void
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}
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define void @locals(i8* swiftasync %ctx) "frame-pointer"="all" {
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; CHECK-LABEL: locals:
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; CHECK: btsq $60, %rbp
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; CHECK: pushq %rbp
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; CHECK: .cfi_def_cfa_offset 16
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; CHECK: .cfi_offset %rbp, -16
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; CHECK: pushq %r14
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; CHECK: leaq 8(%rsp), %rbp
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; CHECK: .cfi_def_cfa_register %rbp
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; CHECK: subq $56, %rsp
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; CHECK: leaq -48(%rbp), %rdi
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; CHECK: callq _bar
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; CHECK: addq $48, %rsp
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; CHECK: addq $16, %rsp
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; CHECK: popq %rbp
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; CHECK: btrq $60, %rbp
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; CHECK: retq
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%var = alloca i32, i32 10
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call void @bar(i32* %var)
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ret void
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}
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define void @use_input_context(i8* swiftasync %ctx, i8** %ptr) "frame-pointer"="all" {
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; CHECK-LABEL: use_input_context:
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; CHECK: movq %r14, (%rdi)
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store i8* %ctx, i8** %ptr
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ret void
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}
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define i8** @context_in_func() "frame-pointer"="non-leaf" {
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; CHECK-LABEL: context_in_func:
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; CHECK: leaq -8(%rbp), %rax
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; CHECK-32-LABEL: context_in_func
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; CHECK-32: movl %esp, %eax
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%ptr = call i8** @llvm.swift.async.context.addr()
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ret i8** %ptr
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}
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define void @write_frame_context(i8* swiftasync %ctx, i8* %newctx) "frame-pointer"="non-leaf" {
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; CHECK-LABEL: write_frame_context:
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; CHECK: movq %rbp, [[TMP:%.*]]
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; CHECK: subq $8, [[TMP]]
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; CHECK: movq %rdi, ([[TMP]])
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%ptr = call i8** @llvm.swift.async.context.addr()
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store i8* %newctx, i8** %ptr
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ret void
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}
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define void @simple_fp_elim(i8* swiftasync %ctx) "frame-pointer"="non-leaf" {
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; CHECK-LABEL: simple_fp_elim:
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; CHECK-NOT: btsq
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ret void
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}
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declare void @bar(i32*)
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declare i8** @llvm.swift.async.context.addr()
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