shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/statepoint-vreg-invoke.ll
Denis Antrushin 6f45049fb6 [Statepoints] Disable VReg lowering for values used on exception path of invoke. 
Currently we lower invokes the same way as usual calls, e.g.:

V1 = STATEPOINT ... V (tied-def 0)

But this is incorrect is V1 is used on exceptional path.
By LLVM rules V1 neither dominates its uses in landing pad, nor
its live range is live on entry to landing pad. So compiler is
allowed to do various weird transformations like splitting live
range after statepoint and use split LR in catch block.

Until (and if) we find better solution to this problem, let's
use old lowering (spilling) for those values which are used on
exceptional path and allow VReg lowering for values used only
on normal path.

Differential Revision: https://reviews.llvm.org/D93449
2020-12-21 20:27:05 +07:00

160 lines
11 KiB
LLVM
Raw Blame History

; RUN: llc -max-registers-for-gc-values=4 -stop-after virtregrewriter < %s | FileCheck %s
target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"
declare dso_local void @"some_call"(i64 addrspace(1)*)
declare dso_local i32 @foo(i32, i8 addrspace(1)*, i32, i32, i32)
declare dso_local i32* @personality_function()
define i64 addrspace(1)* @test_basic_invoke(i64 addrspace(1)* %obj, i64 addrspace(1)* %obj1)
; CHECK-LABEL: name: test_basic_invoke
; CHECK: bb.0.entry:
; CHECK: MOV64mr %stack.1, 1, $noreg, 0, $noreg, renamable $rdi :: (store 8 into %stack.1)
; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed renamable $rsi :: (store 8 into %stack.0)
; CHECK: STATEPOINT 0, 0, 1, @some_call, $rdi, 2, 0, 2, 0, 2, 5, 2, 0, 2, -1, 2, 0, 2, 0, 2, 0, 2, 2, 1, 8, %stack.0, 0, 1, 8, %stack.1, 0, 2, 0, 2, 2, 0, 0, 1, 1, csr_64, implicit-def $rsp, implicit-def $ssp :: (volatile load store 8 on %stack.0), (volatile load store 8 on %stack.1)
; CHECK: JMP_1 %bb.1
; CHECK: bb.1.safepoint_normal_dest:
; CHECK: renamable $rax = MOV64rm %stack.1, 1, $noreg, 0, $noreg :: (load 8 from %stack.1)
; CHECK: bb.2.normal_return:
; CHECK: RET 0, $rax
; CHECK: bb.3.exceptional_return (landing-pad):
; CHECK: renamable $rax = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
; CHECK: RET 0, $rax
gc "statepoint-example" personality i32* ()* @"personality_function" {
entry:
%0 = invoke token (i64, i32, void (i64 addrspace(1)*)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidp1i64f(i64 0, i32 0, void (i64 addrspace(1)*)* @some_call, i32 1, i32 0, i64 addrspace(1)* %obj, i32 0, i32 0) ["gc-live" (i64 addrspace(1)* %obj, i64 addrspace(1)* %obj1), "deopt" (i32 0, i32 -1, i32 0, i32 0, i32 0)]
to label %safepoint_normal_dest unwind label %exceptional_return
safepoint_normal_dest:
%obj.relocated = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %0, i32 0, i32 0)
%obj1.relocated = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %0, i32 1, i32 1)
br label %normal_return
normal_return:
ret i64 addrspace(1)* %obj.relocated
exceptional_return:
%landing_pad = landingpad token
cleanup
%obj.relocated1 = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %landing_pad, i32 0, i32 0)
%obj1.relocated1 = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %landing_pad, i32 1, i32 1)
ret i64 addrspace(1)* %obj1.relocated1
}
define i64 addrspace(1)* @test_invoke_same_val(i1 %cond, i64 addrspace(1)* %val1, i64 addrspace(1)* %val2, i64 addrspace(1)* %val3)
; CHECK-LABEL: name: test_invoke_same_val
; CHECK: bb.0.entry:
; CHECK: renamable $rbx = COPY $rcx
; CHECK: renamable $rbp = COPY $rdx
; CHECK: renamable $r14d = COPY $edi
; CHECK: TEST8ri renamable $r14b, 1, implicit-def $eflags
; CHECK: JCC_1 %bb.3, 4, implicit killed $eflags
; CHECK: JMP_1 %bb.1
; CHECK: bb.1.left:
; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, renamable $rsi :: (store 8 into %stack.0)
; CHECK: $rdi = COPY killed renamable $rsi
; CHECK: renamable $rbp = STATEPOINT 0, 0, 1, @some_call, $rdi, 2, 0, 2, 0, 2, 0, 2, 2, killed renamable $rbp(tied-def 0), 1, 8, %stack.0, 0, 2, 0, 2, 2, 0, 0, 1, 1, csr_64, implicit-def $rsp, implicit-def $ssp :: (volatile load store 8 on %stack.0)
; CHECK: JMP_1 %bb.2
; CHECK: bb.2.left.relocs:
; CHECK: renamable $rbx = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
; CHECK: JMP_1 %bb.5
; CHECK: bb.3.right:
; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed renamable $rbp :: (store 8 into %stack.0)
; CHECK: $rdi = COPY killed renamable $rsi
; CHECK: renamable $rbx = STATEPOINT 0, 0, 1, @some_call, $rdi, 2, 0, 2, 0, 2, 0, 2, 2, killed renamable $rbx(tied-def 0), 1, 8, %stack.0, 0, 2, 0, 2, 2, 0, 0, 1, 1, csr_64, implicit-def $rsp, implicit-def $ssp :: (volatile load store 8 on %stack.0)
; CHECK: JMP_1 %bb.4
; CHECK: bb.4.right.relocs:
; CHECK: renamable $rbp = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
; CHECK: bb.5.normal_return:
; CHECK: TEST8ri renamable $r14b, 1, implicit-def $eflags, implicit killed $r14d
; CHECK: renamable $rbx = CMOV64rr killed renamable $rbx, killed renamable $rbp, 4, implicit killed $eflags
; CHECK: $rax = COPY killed renamable $rbx
; CHECK: RET 0, $rax
; CHECK: bb.6.exceptional_return.left (landing-pad):
; CHECK: renamable $rax = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
; CHECK: RET 0, $rax
; CHECK: bb.7.exceptional_return.right (landing-pad):
; CHECK: renamable $rax = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
; CHECK: RET 0, $rax
gc "statepoint-example" personality i32* ()* @"personality_function" {
entry:
br i1 %cond, label %left, label %right
left:
%sp1 = invoke token (i64, i32, void (i64 addrspace(1)*)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidp1i64f(i64 0, i32 0, void (i64 addrspace(1)*)* @some_call, i32 1, i32 0, i64 addrspace(1)* %val1, i32 0, i32 0) ["gc-live"(i64 addrspace(1)* %val1, i64 addrspace(1)* %val2)]
to label %left.relocs unwind label %exceptional_return.left
left.relocs:
%val1.relocated = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %sp1, i32 0, i32 0)
%val2.relocated_left = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %sp1, i32 1, i32 1)
br label %normal_return
right:
%sp2 = invoke token (i64, i32, void (i64 addrspace(1)*)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidp1i64f(i64 0, i32 0, void (i64 addrspace(1)*)* @some_call, i32 1, i32 0, i64 addrspace(1)* %val1, i32 0, i32 0) ["gc-live"(i64 addrspace(1)* %val2, i64 addrspace(1)* %val3)]
to label %right.relocs unwind label %exceptional_return.right
right.relocs:
%val2.relocated_right = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %sp2, i32 0, i32 0)
%val3.relocated = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %sp2, i32 1, i32 1)
br label %normal_return
normal_return:
%a1 = phi i64 addrspace(1)* [%val1.relocated, %left.relocs], [%val3.relocated, %right.relocs]
%a2 = phi i64 addrspace(1)* [%val2.relocated_left, %left.relocs], [%val2.relocated_right, %right.relocs]
%ret = select i1 %cond, i64 addrspace(1)* %a1, i64 addrspace(1)* %a2
ret i64 addrspace(1)* %ret
exceptional_return.left:
%landing_pad = landingpad token
cleanup
%val1.relocated2 = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %landing_pad, i32 0, i32 0)
ret i64 addrspace(1)* %val1.relocated2
exceptional_return.right:
%landing_pad1 = landingpad token
cleanup
%val2.relocated3 = call coldcc i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token %landing_pad1, i32 0, i32 0)
ret i64 addrspace(1)* %val2.relocated3
}
define void @test_duplicate_ir_values() gc "statepoint-example" personality i32* ()* @personality_function {
; CHECK-LABEL: name: test_duplicate_ir_values
; CHECK: bb.0.entry:
; CHECK: renamable $rax = MOV64rm undef renamable $rax, 1, $noreg, 0, $noreg :: (load 8 from `i8 addrspace(1)* addrspace(1)* undef`, addrspace 1)
; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed renamable $rax :: (store 8 into %stack.0)
; CHECK: STATEPOINT 1, 16, 5, undef renamable $rax, undef $edi, undef $rsi, undef $edx, undef $ecx, undef $r8d, 2, 0, 2, 0, 2, 0, 2, 1, 1, 8, %stack.0, 0, 2, 0, 2, 1, 0, 0, csr_64, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax :: (volatile load store 8 on %stack.0)
; CHECK: JMP_1 %bb.1
; CHECK: bb.1.normal_continue:
; CHECK: $edi = MOV32ri 10
; CHECK: STATEPOINT 2882400000, 0, 1, target-flags(x86-plt) @__llvm_deoptimize, killed $edi, 2, 0, 2, 2, 2, 2, 1, 8, %stack.0, 0, 1, 8, %stack.0, 0, 2, 0, 2, 0, 2, 0, csr_64, implicit-def $rsp, implicit-def $ssp
; CHECK: bb.2.exceptional_return (landing-pad):
; CHECK: $edi = MOV32ri -271
; CHECK: STATEPOINT 2882400000, 0, 1, target-flags(x86-plt) @__llvm_deoptimize, killed $edi, 2, 0, 2, 0, 2, 1, 1, 8, %stack.0, 0, 2, 0, 2, 0, 2, 0, csr_64, implicit-def $rsp, implicit-def $ssp
entry:
%val1 = load i8 addrspace(1)*, i8 addrspace(1)* addrspace(1)* undef, align 8
%val2 = load i8 addrspace(1)*, i8 addrspace(1)* addrspace(1)* undef, align 8
%statepoint_token1 = invoke token (i64, i32, i32 (i32, i8 addrspace(1)*, i32, i32, i32)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i32i32p1i8i32i32i32f(i64 1, i32 16, i32 (i32, i8 addrspace(1)*, i32, i32, i32)* nonnull @foo, i32 5, i32 0, i32 undef, i8 addrspace(1)* undef, i32 undef, i32 undef, i32 undef, i32 0, i32 0) [ "deopt"(), "gc-live"(i8 addrspace(1)* %val1, i8 addrspace(1)* %val2) ]
to label %normal_continue unwind label %exceptional_return
normal_continue: ; preds = %entry
%val1.relocated1 = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %statepoint_token1, i32 0, i32 0) ; (%val1, %val1)
%val2.relocated1 = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %statepoint_token1, i32 1, i32 1) ; (%val2, %val2)
%safepoint_token2 = call token (i64, i32, void (i32)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidi32f(i64 2882400000, i32 0, void (i32)* nonnull @__llvm_deoptimize, i32 1, i32 2, i32 10, i32 0, i32 0) [ "deopt"(i8 addrspace(1)* %val1.relocated1, i8 addrspace(1)* %val2.relocated1), "gc-live"() ]
unreachable
exceptional_return: ; preds = %entry
%lpad_token11090 = landingpad token
cleanup
%val2.relocated2 = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %lpad_token11090, i32 1, i32 1) ; (%val2, %val2)
%safepoint_token3 = call token (i64, i32, void (i32)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidi32f(i64 2882400000, i32 0, void (i32)* nonnull @__llvm_deoptimize, i32 1, i32 0, i32 -271, i32 0, i32 0) [ "deopt"(i8 addrspace(1)* %val2.relocated2), "gc-live"() ]
unreachable
}
declare void @__llvm_deoptimize(i32)
declare token @llvm.experimental.gc.statepoint.p0f_isVoidi32f(i64 immarg, i32 immarg, void (i32)*, i32 immarg, i32 immarg, ...)
declare token @llvm.experimental.gc.statepoint.p0f_isVoidp1i64f(i64, i32, void (i64 addrspace(1)*)*, i32, i32, ...)
declare token @llvm.experimental.gc.statepoint.p0f_i32i32p1i8i32i32i32f(i64 immarg, i32 immarg, i32 (i32, i8 addrspace(1)*, i32, i32, i32)*, i32 immarg, i32 immarg, ...)
declare i64 addrspace(1)* @llvm.experimental.gc.relocate.p1i64(token, i32, i32)
declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32, i32)
Reference in New Issue View Git Blame Copy Permalink