| ; RUN: llc -mtriple=x86_64-unknown < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X64 |
| ; RUN: llc -mtriple=x86_64-unknown -O0 < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X64FAST |
| |
| ; RUN: llc -mtriple=i686-unknown < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X86 |
| ; RUN: llc -mtriple=i686-unknown -O0 < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X86FAST |
| |
| declare void @bar(i32) |
| |
| ; Test a simple indirect call and tail call. |
| define void @icall_reg(void (i32)* %fp, i32 %x) #0 { |
| entry: |
| tail call void @bar(i32 %x) |
| tail call void %fp(i32 %x) |
| tail call void @bar(i32 %x) |
| tail call void %fp(i32 %x) |
| ret void |
| } |
| |
| ; X64-LABEL: icall_reg: |
| ; X64-DAG: movq %rdi, %[[fp:[^ ]*]] |
| ; X64-DAG: movl %esi, %[[x:[^ ]*]] |
| ; X64: movl %[[x]], %edi |
| ; X64: callq bar |
| ; X64-DAG: movl %[[x]], %edi |
| ; X64-DAG: movq %[[fp]], %r11 |
| ; X64: callq __llvm_retpoline_r11 |
| ; X64: movl %[[x]], %edi |
| ; X64: callq bar |
| ; X64-DAG: movl %[[x]], %edi |
| ; X64-DAG: movq %[[fp]], %r11 |
| ; X64: jmp __llvm_retpoline_r11 # TAILCALL |
| |
| ; X64FAST-LABEL: icall_reg: |
| ; X64FAST: callq bar |
| ; X64FAST: callq __llvm_retpoline_r11 |
| ; X64FAST: callq bar |
| ; X64FAST: jmp __llvm_retpoline_r11 # TAILCALL |
| |
| ; X86-LABEL: icall_reg: |
| ; X86-DAG: movl 12(%esp), %[[fp:[^ ]*]] |
| ; X86-DAG: movl 16(%esp), %[[x:[^ ]*]] |
| ; X86: pushl %[[x]] |
| ; X86: calll bar |
| ; X86: movl %[[fp]], %eax |
| ; X86: pushl %[[x]] |
| ; X86: calll __llvm_retpoline_eax |
| ; X86: pushl %[[x]] |
| ; X86: calll bar |
| ; X86: movl %[[fp]], %eax |
| ; X86: pushl %[[x]] |
| ; X86: calll __llvm_retpoline_eax |
| ; X86-NOT: # TAILCALL |
| |
| ; X86FAST-LABEL: icall_reg: |
| ; X86FAST: calll bar |
| ; X86FAST: calll __llvm_retpoline_eax |
| ; X86FAST: calll bar |
| ; X86FAST: calll __llvm_retpoline_eax |
| |
| |
| @global_fp = external global void (i32)* |
| |
| ; Test an indirect call through a global variable. |
| define void @icall_global_fp(i32 %x, void (i32)** %fpp) #0 { |
| %fp1 = load void (i32)*, void (i32)** @global_fp |
| call void %fp1(i32 %x) |
| %fp2 = load void (i32)*, void (i32)** @global_fp |
| tail call void %fp2(i32 %x) |
| ret void |
| } |
| |
| ; X64-LABEL: icall_global_fp: |
| ; X64-DAG: movl %edi, %[[x:[^ ]*]] |
| ; X64-DAG: movq global_fp(%rip), %r11 |
| ; X64: callq __llvm_retpoline_r11 |
| ; X64-DAG: movl %[[x]], %edi |
| ; X64-DAG: movq global_fp(%rip), %r11 |
| ; X64: jmp __llvm_retpoline_r11 # TAILCALL |
| |
| ; X64FAST-LABEL: icall_global_fp: |
| ; X64FAST: movq global_fp(%rip), %r11 |
| ; X64FAST: callq __llvm_retpoline_r11 |
| ; X64FAST: movq global_fp(%rip), %r11 |
| ; X64FAST: jmp __llvm_retpoline_r11 # TAILCALL |
| |
| ; X86-LABEL: icall_global_fp: |
| ; X86: movl global_fp, %eax |
| ; X86: pushl 4(%esp) |
| ; X86: calll __llvm_retpoline_eax |
| ; X86: addl $4, %esp |
| ; X86: movl global_fp, %eax |
| ; X86: jmp __llvm_retpoline_eax # TAILCALL |
| |
| ; X86FAST-LABEL: icall_global_fp: |
| ; X86FAST: calll __llvm_retpoline_eax |
| ; X86FAST: jmp __llvm_retpoline_eax # TAILCALL |
| |
| |
| %struct.Foo = type { void (%struct.Foo*)** } |
| |
| ; Test an indirect call through a vtable. |
| define void @vcall(%struct.Foo* %obj) #0 { |
| %vptr_field = getelementptr %struct.Foo, %struct.Foo* %obj, i32 0, i32 0 |
| %vptr = load void (%struct.Foo*)**, void (%struct.Foo*)*** %vptr_field |
| %vslot = getelementptr void(%struct.Foo*)*, void(%struct.Foo*)** %vptr, i32 1 |
| %fp = load void(%struct.Foo*)*, void(%struct.Foo*)** %vslot |
| tail call void %fp(%struct.Foo* %obj) |
| tail call void %fp(%struct.Foo* %obj) |
| ret void |
| } |
| |
| ; X64-LABEL: vcall: |
| ; X64: movq %rdi, %[[obj:[^ ]*]] |
| ; X64: movq (%[[obj]]), %[[vptr:[^ ]*]] |
| ; X64: movq 8(%[[vptr]]), %[[fp:[^ ]*]] |
| ; X64: movq %[[fp]], %r11 |
| ; X64: callq __llvm_retpoline_r11 |
| ; X64-DAG: movq %[[obj]], %rdi |
| ; X64-DAG: movq %[[fp]], %r11 |
| ; X64: jmp __llvm_retpoline_r11 # TAILCALL |
| |
| ; X64FAST-LABEL: vcall: |
| ; X64FAST: callq __llvm_retpoline_r11 |
| ; X64FAST: jmp __llvm_retpoline_r11 # TAILCALL |
| |
| ; X86-LABEL: vcall: |
| ; X86: movl 8(%esp), %[[obj:[^ ]*]] |
| ; X86: movl (%[[obj]]), %[[vptr:[^ ]*]] |
| ; X86: movl 4(%[[vptr]]), %[[fp:[^ ]*]] |
| ; X86: movl %[[fp]], %eax |
| ; X86: pushl %[[obj]] |
| ; X86: calll __llvm_retpoline_eax |
| ; X86: addl $4, %esp |
| ; X86: movl %[[fp]], %eax |
| ; X86: jmp __llvm_retpoline_eax # TAILCALL |
| |
| ; X86FAST-LABEL: vcall: |
| ; X86FAST: calll __llvm_retpoline_eax |
| ; X86FAST: jmp __llvm_retpoline_eax # TAILCALL |
| |
| |
| declare void @direct_callee() |
| |
| define void @direct_tail() #0 { |
| tail call void @direct_callee() |
| ret void |
| } |
| |
| ; X64-LABEL: direct_tail: |
| ; X64: jmp direct_callee # TAILCALL |
| ; X64FAST-LABEL: direct_tail: |
| ; X64FAST: jmp direct_callee # TAILCALL |
| ; X86-LABEL: direct_tail: |
| ; X86: jmp direct_callee # TAILCALL |
| ; X86FAST-LABEL: direct_tail: |
| ; X86FAST: jmp direct_callee # TAILCALL |
| |
| |
| declare void @nonlazybind_callee() #1 |
| |
| define void @nonlazybind_caller() #0 { |
| call void @nonlazybind_callee() |
| tail call void @nonlazybind_callee() |
| ret void |
| } |
| |
| ; nonlazybind wasn't implemented in LLVM 5.0, so this looks the same as direct. |
| ; X64-LABEL: nonlazybind_caller: |
| ; X64: callq nonlazybind_callee |
| ; X64: jmp nonlazybind_callee # TAILCALL |
| ; X64FAST-LABEL: nonlazybind_caller: |
| ; X64FAST: callq nonlazybind_callee |
| ; X64FAST: jmp nonlazybind_callee # TAILCALL |
| ; X86-LABEL: nonlazybind_caller: |
| ; X86: calll nonlazybind_callee |
| ; X86: jmp nonlazybind_callee # TAILCALL |
| ; X86FAST-LABEL: nonlazybind_caller: |
| ; X86FAST: calll nonlazybind_callee |
| ; X86FAST: jmp nonlazybind_callee # TAILCALL |
| |
| |
| @indirectbr_rewrite.targets = constant [10 x i8*] [i8* blockaddress(@indirectbr_rewrite, %bb0), |
| i8* blockaddress(@indirectbr_rewrite, %bb1), |
| i8* blockaddress(@indirectbr_rewrite, %bb2), |
| i8* blockaddress(@indirectbr_rewrite, %bb3), |
| i8* blockaddress(@indirectbr_rewrite, %bb4), |
| i8* blockaddress(@indirectbr_rewrite, %bb5), |
| i8* blockaddress(@indirectbr_rewrite, %bb6), |
| i8* blockaddress(@indirectbr_rewrite, %bb7), |
| i8* blockaddress(@indirectbr_rewrite, %bb8), |
| i8* blockaddress(@indirectbr_rewrite, %bb9)] |
| |
| ; Check that when retpolines are enabled a function with indirectbr gets |
| ; rewritten to use switch, and that in turn doesn't get lowered as a jump |
| ; table. |
| define void @indirectbr_rewrite(i64* readonly %p, i64* %sink) #0 { |
| ; X64-LABEL: indirectbr_rewrite: |
| ; X64-NOT: jmpq |
| ; X86-LABEL: indirectbr_rewrite: |
| ; X86-NOT: jmpl |
| entry: |
| %i0 = load i64, i64* %p |
| %target.i0 = getelementptr [10 x i8*], [10 x i8*]* @indirectbr_rewrite.targets, i64 0, i64 %i0 |
| %target0 = load i8*, i8** %target.i0 |
| indirectbr i8* %target0, [label %bb1, label %bb3] |
| |
| bb0: |
| store volatile i64 0, i64* %sink |
| br label %latch |
| |
| bb1: |
| store volatile i64 1, i64* %sink |
| br label %latch |
| |
| bb2: |
| store volatile i64 2, i64* %sink |
| br label %latch |
| |
| bb3: |
| store volatile i64 3, i64* %sink |
| br label %latch |
| |
| bb4: |
| store volatile i64 4, i64* %sink |
| br label %latch |
| |
| bb5: |
| store volatile i64 5, i64* %sink |
| br label %latch |
| |
| bb6: |
| store volatile i64 6, i64* %sink |
| br label %latch |
| |
| bb7: |
| store volatile i64 7, i64* %sink |
| br label %latch |
| |
| bb8: |
| store volatile i64 8, i64* %sink |
| br label %latch |
| |
| bb9: |
| store volatile i64 9, i64* %sink |
| br label %latch |
| |
| latch: |
| %i.next = load i64, i64* %p |
| %target.i.next = getelementptr [10 x i8*], [10 x i8*]* @indirectbr_rewrite.targets, i64 0, i64 %i.next |
| %target.next = load i8*, i8** %target.i.next |
| ; Potentially hit a full 10 successors here so that even if we rewrite as |
| ; a switch it will try to be lowered with a jump table. |
| indirectbr i8* %target.next, [label %bb0, |
| label %bb1, |
| label %bb2, |
| label %bb3, |
| label %bb4, |
| label %bb5, |
| label %bb6, |
| label %bb7, |
| label %bb8, |
| label %bb9] |
| } |
| |
| ; Lastly check that the necessary thunks were emitted. |
| ; |
| ; X64-LABEL: .section .text.__llvm_retpoline_r11,{{.*}},__llvm_retpoline_r11,comdat |
| ; X64-NEXT: .hidden __llvm_retpoline_r11 |
| ; X64-NEXT: .weak __llvm_retpoline_r11 |
| ; X64: __llvm_retpoline_r11: |
| ; X64-NEXT: # {{.*}} # %entry |
| ; X64-NEXT: callq [[CALL_TARGET:.*]] |
| ; X64-NEXT: [[CAPTURE_SPEC:.*]]: # Block address taken |
| ; X64-NEXT: # %entry |
| ; X64-NEXT: # =>This Inner Loop Header: Depth=1 |
| ; X64-NEXT: pause |
| ; X64-NEXT: lfence |
| ; X64-NEXT: jmp [[CAPTURE_SPEC]] |
| ; X64-NEXT: .p2align 4, 0x90 |
| ; X64-NEXT: [[CALL_TARGET]]: # Block address taken |
| ; X64-NEXT: # %entry |
| ; X64-NEXT: movq %r11, (%rsp) |
| ; X64-NEXT: retq |
| ; |
| ; X86-LABEL: .section .text.__llvm_retpoline_eax,{{.*}},__llvm_retpoline_eax,comdat |
| ; X86-NEXT: .hidden __llvm_retpoline_eax |
| ; X86-NEXT: .weak __llvm_retpoline_eax |
| ; X86: __llvm_retpoline_eax: |
| ; X86-NEXT: # {{.*}} # %entry |
| ; X86-NEXT: calll [[CALL_TARGET:.*]] |
| ; X86-NEXT: [[CAPTURE_SPEC:.*]]: # Block address taken |
| ; X86-NEXT: # %entry |
| ; X86-NEXT: # =>This Inner Loop Header: Depth=1 |
| ; X86-NEXT: pause |
| ; X86-NEXT: lfence |
| ; X86-NEXT: jmp [[CAPTURE_SPEC]] |
| ; X86-NEXT: .p2align 4, 0x90 |
| ; X86-NEXT: [[CALL_TARGET]]: # Block address taken |
| ; X86-NEXT: # %entry |
| ; X86-NEXT: movl %eax, (%esp) |
| ; X86-NEXT: retl |
| ; |
| ; X86-LABEL: .section .text.__llvm_retpoline_ecx,{{.*}},__llvm_retpoline_ecx,comdat |
| ; X86-NEXT: .hidden __llvm_retpoline_ecx |
| ; X86-NEXT: .weak __llvm_retpoline_ecx |
| ; X86: __llvm_retpoline_ecx: |
| ; X86-NEXT: # {{.*}} # %entry |
| ; X86-NEXT: calll [[CALL_TARGET:.*]] |
| ; X86-NEXT: [[CAPTURE_SPEC:.*]]: # Block address taken |
| ; X86-NEXT: # %entry |
| ; X86-NEXT: # =>This Inner Loop Header: Depth=1 |
| ; X86-NEXT: pause |
| ; X86-NEXT: lfence |
| ; X86-NEXT: jmp [[CAPTURE_SPEC]] |
| ; X86-NEXT: .p2align 4, 0x90 |
| ; X86-NEXT: [[CALL_TARGET]]: # Block address taken |
| ; X86-NEXT: # %entry |
| ; X86-NEXT: movl %ecx, (%esp) |
| ; X86-NEXT: retl |
| ; |
| ; X86-LABEL: .section .text.__llvm_retpoline_edx,{{.*}},__llvm_retpoline_edx,comdat |
| ; X86-NEXT: .hidden __llvm_retpoline_edx |
| ; X86-NEXT: .weak __llvm_retpoline_edx |
| ; X86: __llvm_retpoline_edx: |
| ; X86-NEXT: # {{.*}} # %entry |
| ; X86-NEXT: calll [[CALL_TARGET:.*]] |
| ; X86-NEXT: [[CAPTURE_SPEC:.*]]: # Block address taken |
| ; X86-NEXT: # %entry |
| ; X86-NEXT: # =>This Inner Loop Header: Depth=1 |
| ; X86-NEXT: pause |
| ; X86-NEXT: lfence |
| ; X86-NEXT: jmp [[CAPTURE_SPEC]] |
| ; X86-NEXT: .p2align 4, 0x90 |
| ; X86-NEXT: [[CALL_TARGET]]: # Block address taken |
| ; X86-NEXT: # %entry |
| ; X86-NEXT: movl %edx, (%esp) |
| ; X86-NEXT: retl |
| ; |
| ; X86-LABEL: .section .text.__llvm_retpoline_edi,{{.*}},__llvm_retpoline_edi,comdat |
| ; X86-NEXT: .hidden __llvm_retpoline_edi |
| ; X86-NEXT: .weak __llvm_retpoline_edi |
| ; X86: __llvm_retpoline_edi: |
| ; X86-NEXT: # {{.*}} # %entry |
| ; X86-NEXT: calll [[CALL_TARGET:.*]] |
| ; X86-NEXT: [[CAPTURE_SPEC:.*]]: # Block address taken |
| ; X86-NEXT: # %entry |
| ; X86-NEXT: # =>This Inner Loop Header: Depth=1 |
| ; X86-NEXT: pause |
| ; X86-NEXT: lfence |
| ; X86-NEXT: jmp [[CAPTURE_SPEC]] |
| ; X86-NEXT: .p2align 4, 0x90 |
| ; X86-NEXT: [[CALL_TARGET]]: # Block address taken |
| ; X86-NEXT: # %entry |
| ; X86-NEXT: movl %edi, (%esp) |
| ; X86-NEXT: retl |
| |
| |
| attributes #0 = { "target-features"="+retpoline" } |
| attributes #1 = { nonlazybind } |
