[llvm-bugs] [Bug 26414] New: Tail call is generated in interrupt handler
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Feb 1 06:00:40 PST 2016
https://llvm.org/bugs/show_bug.cgi?id=26414
Bug ID: 26414
Summary: Tail call is generated in interrupt handler
Product: new-bugs
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedbugs at nondot.org
Reporter: hjl.tools at gmail.com
CC: kevin.b.smith at intel.com, llvm-bugs at lists.llvm.org
Classification: Unclassified
[hjl at gnu-6 interrupt-8]$ cat x.i
extern void subroutine1(void);
__attribute__ ((interrupt))
void ih(void * frame)
{
subroutine1();
}
[hjl at gnu-6 interrupt-8]$ make x.s
/export/build/gnu/llvm-clang-bootstrap/stage1/build-x86_64-linux/bin/clang -O2
-Wall -march=nehalem -S -o x.s x.i
[hjl at gnu-6 interrupt-8]$ cat x.s
.text
.file "x.i"
.globl ih
.p2align 4, 0x90
.type ih, at function
ih: # @ih
.cfi_startproc
# BB#0:
pushq %rsp
.Ltmp0:
.cfi_def_cfa_offset 16
pushq %rax
.Ltmp1:
.cfi_def_cfa_offset 24
pushq %r11
.Ltmp2:
.cfi_def_cfa_offset 32
pushq %r10
.Ltmp3:
.cfi_def_cfa_offset 40
pushq %r9
.Ltmp4:
.cfi_def_cfa_offset 48
pushq %r8
.Ltmp5:
.cfi_def_cfa_offset 56
pushq %rdi
.Ltmp6:
.cfi_def_cfa_offset 64
pushq %rsi
.Ltmp7:
.cfi_def_cfa_offset 72
pushq %rdx
.Ltmp8:
.cfi_def_cfa_offset 80
pushq %rcx
.Ltmp9:
.cfi_def_cfa_offset 88
subq $392, %rsp # imm = 0x188
movaps %xmm31, 368(%rsp) # 16-byte Spill
movaps %xmm30, 352(%rsp) # 16-byte Spill
movaps %xmm29, 336(%rsp) # 16-byte Spill
movaps %xmm28, 320(%rsp) # 16-byte Spill
movaps %xmm27, 304(%rsp) # 16-byte Spill
movaps %xmm26, 288(%rsp) # 16-byte Spill
movaps %xmm25, 272(%rsp) # 16-byte Spill
movaps %xmm24, 256(%rsp) # 16-byte Spill
movaps %xmm23, 240(%rsp) # 16-byte Spill
movaps %xmm22, 224(%rsp) # 16-byte Spill
movaps %xmm21, 208(%rsp) # 16-byte Spill
movaps %xmm20, 192(%rsp) # 16-byte Spill
movaps %xmm19, 176(%rsp) # 16-byte Spill
movaps %xmm18, 160(%rsp) # 16-byte Spill
movaps %xmm17, 144(%rsp) # 16-byte Spill
movaps %xmm16, 128(%rsp) # 16-byte Spill
movaps %xmm15, 112(%rsp) # 16-byte Spill
movaps %xmm14, 96(%rsp) # 16-byte Spill
movaps %xmm13, 80(%rsp) # 16-byte Spill
movaps %xmm12, 64(%rsp) # 16-byte Spill
movaps %xmm11, 48(%rsp) # 16-byte Spill
movaps %xmm10, 32(%rsp) # 16-byte Spill
movaps %xmm9, 16(%rsp) # 16-byte Spill
movaps %xmm8, (%rsp) # 16-byte Spill
movaps %xmm7, -16(%rsp) # 16-byte Spill
movaps %xmm6, -32(%rsp) # 16-byte Spill
movaps %xmm5, -48(%rsp) # 16-byte Spill
movaps %xmm4, -64(%rsp) # 16-byte Spill
movaps %xmm3, -80(%rsp) # 16-byte Spill
movaps %xmm2, -96(%rsp) # 16-byte Spill
movaps %xmm1, -112(%rsp) # 16-byte Spill
movaps %xmm0, -128(%rsp) # 16-byte Spill
.Ltmp10:
.cfi_def_cfa_offset 480
.Ltmp11:
.cfi_offset %rcx, -88
.Ltmp12:
.cfi_offset %rdx, -80
.Ltmp13:
.cfi_offset %rsi, -72
.Ltmp14:
.cfi_offset %rdi, -64
.Ltmp15:
.cfi_offset %r8, -56
.Ltmp16:
.cfi_offset %r9, -48
.Ltmp17:
.cfi_offset %r10, -40
.Ltmp18:
.cfi_offset %r11, -32
.Ltmp19:
.cfi_offset %xmm0, -608
.Ltmp20:
.cfi_offset %xmm1, -592
.Ltmp21:
.cfi_offset %xmm2, -576
.Ltmp22:
.cfi_offset %xmm3, -560
.Ltmp23:
.cfi_offset %xmm4, -544
.Ltmp24:
.cfi_offset %xmm5, -528
.Ltmp25:
.cfi_offset %xmm6, -512
.Ltmp26:
.cfi_offset %xmm7, -496
.Ltmp27:
.cfi_offset %xmm8, -480
.Ltmp28:
.cfi_offset %xmm9, -464
.Ltmp29:
.cfi_offset %xmm10, -448
.Ltmp30:
.cfi_offset %xmm11, -432
.Ltmp31:
.cfi_offset %xmm12, -416
.Ltmp32:
.cfi_offset %xmm13, -400
.Ltmp33:
.cfi_offset %xmm14, -384
.Ltmp34:
.cfi_offset %xmm15, -368
.Ltmp35:
.cfi_offset %rax, -24
.Ltmp36:
.cfi_offset %rsp, -16
.Ltmp37:
.cfi_offset %xmm16, -352
.Ltmp38:
.cfi_offset %xmm17, -336
.Ltmp39:
.cfi_offset %xmm18, -320
.Ltmp40:
.cfi_offset %xmm19, -304
.Ltmp41:
.cfi_offset %xmm20, -288
.Ltmp42:
.cfi_offset %xmm21, -272
.Ltmp43:
.cfi_offset %xmm22, -256
.Ltmp44:
.cfi_offset %xmm23, -240
.Ltmp45:
.cfi_offset %xmm24, -224
.Ltmp46:
.cfi_offset %xmm25, -208
.Ltmp47:
.cfi_offset %xmm26, -192
.Ltmp48:
.cfi_offset %xmm27, -176
.Ltmp49:
.cfi_offset %xmm28, -160
.Ltmp50:
.cfi_offset %xmm29, -144
.Ltmp51:
.cfi_offset %xmm30, -128
.Ltmp52:
.cfi_offset %xmm31, -112
movaps -128(%rsp), %xmm0 # 16-byte Reload
movaps -112(%rsp), %xmm1 # 16-byte Reload
movaps -96(%rsp), %xmm2 # 16-byte Reload
movaps -80(%rsp), %xmm3 # 16-byte Reload
movaps -64(%rsp), %xmm4 # 16-byte Reload
movaps -48(%rsp), %xmm5 # 16-byte Reload
movaps -32(%rsp), %xmm6 # 16-byte Reload
movaps -16(%rsp), %xmm7 # 16-byte Reload
movaps (%rsp), %xmm8 # 16-byte Reload
movaps 16(%rsp), %xmm9 # 16-byte Reload
movaps 32(%rsp), %xmm10 # 16-byte Reload
movaps 48(%rsp), %xmm11 # 16-byte Reload
movaps 64(%rsp), %xmm12 # 16-byte Reload
movaps 80(%rsp), %xmm13 # 16-byte Reload
movaps 96(%rsp), %xmm14 # 16-byte Reload
movaps 112(%rsp), %xmm15 # 16-byte Reload
movaps 128(%rsp), %xmm16 # 16-byte Reload
movaps 144(%rsp), %xmm17 # 16-byte Reload
movaps 160(%rsp), %xmm18 # 16-byte Reload
movaps 176(%rsp), %xmm19 # 16-byte Reload
movaps 192(%rsp), %xmm20 # 16-byte Reload
movaps 208(%rsp), %xmm21 # 16-byte Reload
movaps 224(%rsp), %xmm22 # 16-byte Reload
movaps 240(%rsp), %xmm23 # 16-byte Reload
movaps 256(%rsp), %xmm24 # 16-byte Reload
movaps 272(%rsp), %xmm25 # 16-byte Reload
movaps 288(%rsp), %xmm26 # 16-byte Reload
movaps 304(%rsp), %xmm27 # 16-byte Reload
movaps 320(%rsp), %xmm28 # 16-byte Reload
movaps 336(%rsp), %xmm29 # 16-byte Reload
movaps 352(%rsp), %xmm30 # 16-byte Reload
movaps 368(%rsp), %xmm31 # 16-byte Reload
addq $392, %rsp # imm = 0x188
popq %rcx
popq %rdx
popq %rsi
popq %rdi
popq %r8
popq %r9
popq %r10
popq %r11
popq %rax
popq %rsp
jmp subroutine1 # TAILCALL
.Lfunc_end0:
.size ih, .Lfunc_end0-ih
.cfi_endproc
.ident "clang version 3.9.0 (http://llvm.org/git/clang.git
1f64ddbc4c5d1036b68ec896765a7535537ded85) (http://llvm.org/git/llvm.git
43b517fe4e0a181b1cf20f36fd9eb92f7b32946c)"
.section ".note.GNU-stack","", at progbits
[hjl at gnu-6 interrupt-8]$
Since interrupt handler must be returned with iretq, tail call can't
be used.
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