167 lines
5.4 KiB
LLVM
167 lines
5.4 KiB
LLVM
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; RUN: llc -verify-machineinstrs -mtriple=x86_64-unknown < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X64
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; RUN: llc -verify-machineinstrs -mtriple=x86_64-unknown -O0 < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X64FAST
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; RUN: llc -verify-machineinstrs -mtriple=i686-unknown < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X86
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; RUN: llc -verify-machineinstrs -mtriple=i686-unknown -O0 < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X86FAST
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declare dso_local void @bar(i32)
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; Test a simple indirect call and tail call.
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define void @icall_reg(void (i32)* %fp, i32 %x) #0 {
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entry:
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tail call void @bar(i32 %x)
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tail call void %fp(i32 %x)
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tail call void @bar(i32 %x)
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tail call void %fp(i32 %x)
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ret void
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}
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; X64-LABEL: icall_reg:
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; X64-DAG: movq %rdi, %[[fp:[^ ]*]]
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; X64-DAG: movl %esi, %[[x:[^ ]*]]
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; X64: movl %esi, %edi
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; X64: callq bar
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; X64-DAG: movl %[[x]], %edi
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; X64-DAG: movq %[[fp]], %r11
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; X64: callq __x86_indirect_thunk_r11
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; X64: movl %[[x]], %edi
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; X64: callq bar
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; X64-DAG: movl %[[x]], %edi
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; X64-DAG: movq %[[fp]], %r11
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; X64: jmp __x86_indirect_thunk_r11 # TAILCALL
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; X64FAST-LABEL: icall_reg:
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; X64FAST: callq bar
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; X64FAST: callq __x86_indirect_thunk_r11
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; X64FAST: callq bar
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; X64FAST: jmp __x86_indirect_thunk_r11 # TAILCALL
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; X86-LABEL: icall_reg:
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; X86-DAG: movl 12(%esp), %[[fp:[^ ]*]]
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; X86-DAG: movl 16(%esp), %[[x:[^ ]*]]
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; X86: pushl %[[x]]
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; X86: calll bar
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; X86: movl %[[fp]], %eax
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; X86: pushl %[[x]]
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; X86: calll __x86_indirect_thunk_eax
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; X86: pushl %[[x]]
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; X86: calll bar
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; X86: movl %[[fp]], %eax
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; X86: pushl %[[x]]
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; X86: calll __x86_indirect_thunk_eax
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; X86-NOT: # TAILCALL
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; X86FAST-LABEL: icall_reg:
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; X86FAST: calll bar
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; X86FAST: calll __x86_indirect_thunk_eax
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; X86FAST: calll bar
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; X86FAST: calll __x86_indirect_thunk_eax
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@global_fp = external dso_local global void (i32)*
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; Test an indirect call through a global variable.
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define void @icall_global_fp(i32 %x, void (i32)** %fpp) #0 {
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%fp1 = load void (i32)*, void (i32)** @global_fp
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call void %fp1(i32 %x)
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%fp2 = load void (i32)*, void (i32)** @global_fp
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tail call void %fp2(i32 %x)
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ret void
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}
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; X64-LABEL: icall_global_fp:
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; X64-DAG: movl %edi, %[[x:[^ ]*]]
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; X64-DAG: movq global_fp(%rip), %r11
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; X64: callq __x86_indirect_thunk_r11
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; X64-DAG: movl %[[x]], %edi
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; X64-DAG: movq global_fp(%rip), %r11
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; X64: jmp __x86_indirect_thunk_r11 # TAILCALL
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; X64FAST-LABEL: icall_global_fp:
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; X64FAST: movq global_fp(%rip), %r11
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; X64FAST: callq __x86_indirect_thunk_r11
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; X64FAST: movq global_fp(%rip), %r11
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; X64FAST: jmp __x86_indirect_thunk_r11 # TAILCALL
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; X86-LABEL: icall_global_fp:
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; X86: movl global_fp, %eax
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; X86: pushl 4(%esp)
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; X86: calll __x86_indirect_thunk_eax
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; X86: addl $4, %esp
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; X86: movl global_fp, %eax
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; X86: jmp __x86_indirect_thunk_eax # TAILCALL
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; X86FAST-LABEL: icall_global_fp:
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; X86FAST: calll __x86_indirect_thunk_eax
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; X86FAST: jmp __x86_indirect_thunk_eax # TAILCALL
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%struct.Foo = type { void (%struct.Foo*)** }
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; Test an indirect call through a vtable.
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define void @vcall(%struct.Foo* %obj) #0 {
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%vptr_field = getelementptr %struct.Foo, %struct.Foo* %obj, i32 0, i32 0
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%vptr = load void (%struct.Foo*)**, void (%struct.Foo*)*** %vptr_field
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%vslot = getelementptr void(%struct.Foo*)*, void(%struct.Foo*)** %vptr, i32 1
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%fp = load void(%struct.Foo*)*, void(%struct.Foo*)** %vslot
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tail call void %fp(%struct.Foo* %obj)
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tail call void %fp(%struct.Foo* %obj)
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ret void
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}
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; X64-LABEL: vcall:
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; X64: movq %rdi, %[[obj:[^ ]*]]
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; X64: movq (%rdi), %[[vptr:[^ ]*]]
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; X64: movq 8(%[[vptr]]), %[[fp:[^ ]*]]
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; X64: movq %[[fp]], %r11
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; X64: callq __x86_indirect_thunk_r11
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; X64-DAG: movq %[[obj]], %rdi
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; X64-DAG: movq %[[fp]], %r11
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; X64: jmp __x86_indirect_thunk_r11 # TAILCALL
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; X64FAST-LABEL: vcall:
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; X64FAST: callq __x86_indirect_thunk_r11
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; X64FAST: jmp __x86_indirect_thunk_r11 # TAILCALL
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; X86-LABEL: vcall:
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; X86: movl 8(%esp), %[[obj:[^ ]*]]
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; X86: movl (%[[obj]]), %[[vptr:[^ ]*]]
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; X86: movl 4(%[[vptr]]), %[[fp:[^ ]*]]
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; X86: movl %[[fp]], %eax
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; X86: pushl %[[obj]]
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; X86: calll __x86_indirect_thunk_eax
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; X86: addl $4, %esp
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; X86: movl %[[fp]], %eax
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; X86: jmp __x86_indirect_thunk_eax # TAILCALL
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; X86FAST-LABEL: vcall:
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; X86FAST: calll __x86_indirect_thunk_eax
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; X86FAST: jmp __x86_indirect_thunk_eax # TAILCALL
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declare dso_local void @direct_callee()
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define void @direct_tail() #0 {
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tail call void @direct_callee()
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ret void
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}
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; X64-LABEL: direct_tail:
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; X64: jmp direct_callee # TAILCALL
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; X64FAST-LABEL: direct_tail:
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; X64FAST: jmp direct_callee # TAILCALL
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; X86-LABEL: direct_tail:
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; X86: jmp direct_callee # TAILCALL
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; X86FAST-LABEL: direct_tail:
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; X86FAST: jmp direct_callee # TAILCALL
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; Lastly check that no thunks were emitted.
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; X64-NOT: __{{.*}}_retpoline_{{.*}}:
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; X64FAST-NOT: __{{.*}}_retpoline_{{.*}}:
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; X86-NOT: __{{.*}}_retpoline_{{.*}}:
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; X86FAST-NOT: __{{.*}}_retpoline_{{.*}}:
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attributes #0 = { "target-features"="+retpoline-indirect-calls,+retpoline-external-thunk" }
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