1 ; RUN: llc -mtriple=x86_64-unknown < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X64 2 ; RUN: llc -mtriple=x86_64-unknown -O0 < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X64FAST 3 4 ; RUN: llc -mtriple=i686-unknown < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X86 5 ; RUN: llc -mtriple=i686-unknown -O0 < %s | FileCheck %s --implicit-check-not="jmp.*\*" --implicit-check-not="call.*\*" --check-prefix=X86FAST 6 7 declare void @bar(i32) 8 9 ; Test a simple indirect call and tail call. 10 define void @icall_reg(void (i32)* %fp, i32 %x) #0 { 11 entry: 12 tail call void @bar(i32 %x) 13 tail call void %fp(i32 %x) 14 tail call void @bar(i32 %x) 15 tail call void %fp(i32 %x) 16 ret void 17 } 18 19 ; X64-LABEL: icall_reg: 20 ; X64-DAG: movq %rdi, %[[fp:[^ ]*]] 21 ; X64-DAG: movl %esi, %[[x:[^ ]*]] 22 ; X64: movl %esi, %edi 23 ; X64: callq bar 24 ; X64-DAG: movl %[[x]], %edi 25 ; X64-DAG: movq %[[fp]], %r11 26 ; X64: callq __x86_indirect_thunk_r11 27 ; X64: movl %[[x]], %edi 28 ; X64: callq bar 29 ; X64-DAG: movl %[[x]], %edi 30 ; X64-DAG: movq %[[fp]], %r11 31 ; X64: jmp __x86_indirect_thunk_r11 # TAILCALL 32 33 ; X64FAST-LABEL: icall_reg: 34 ; X64FAST: callq bar 35 ; X64FAST: callq __x86_indirect_thunk_r11 36 ; X64FAST: callq bar 37 ; X64FAST: jmp __x86_indirect_thunk_r11 # TAILCALL 38 39 ; X86-LABEL: icall_reg: 40 ; X86-DAG: movl 12(%esp), %[[fp:[^ ]*]] 41 ; X86-DAG: movl 16(%esp), %[[x:[^ ]*]] 42 ; X86: pushl %[[x]] 43 ; X86: calll bar 44 ; X86: movl %[[fp]], %eax 45 ; X86: pushl %[[x]] 46 ; X86: calll __x86_indirect_thunk_eax 47 ; X86: pushl %[[x]] 48 ; X86: calll bar 49 ; X86: movl %[[fp]], %eax 50 ; X86: pushl %[[x]] 51 ; X86: calll __x86_indirect_thunk_eax 52 ; X86-NOT: # TAILCALL 53 54 ; X86FAST-LABEL: icall_reg: 55 ; X86FAST: calll bar 56 ; X86FAST: calll __x86_indirect_thunk_eax 57 ; X86FAST: calll bar 58 ; X86FAST: calll __x86_indirect_thunk_eax 59 60 61 @global_fp = external global void (i32)* 62 63 ; Test an indirect call through a global variable. 64 define void @icall_global_fp(i32 %x, void (i32)** %fpp) #0 { 65 %fp1 = load void (i32)*, void (i32)** @global_fp 66 call void %fp1(i32 %x) 67 %fp2 = load void (i32)*, void (i32)** @global_fp 68 tail call void %fp2(i32 %x) 69 ret void 70 } 71 72 ; X64-LABEL: icall_global_fp: 73 ; X64-DAG: movl %edi, %[[x:[^ ]*]] 74 ; X64-DAG: movq global_fp(%rip), %r11 75 ; X64: callq __x86_indirect_thunk_r11 76 ; X64-DAG: movl %[[x]], %edi 77 ; X64-DAG: movq global_fp(%rip), %r11 78 ; X64: jmp __x86_indirect_thunk_r11 # TAILCALL 79 80 ; X64FAST-LABEL: icall_global_fp: 81 ; X64FAST: movq global_fp(%rip), %r11 82 ; X64FAST: callq __x86_indirect_thunk_r11 83 ; X64FAST: movq global_fp(%rip), %r11 84 ; X64FAST: jmp __x86_indirect_thunk_r11 # TAILCALL 85 86 ; X86-LABEL: icall_global_fp: 87 ; X86: movl global_fp, %eax 88 ; X86: pushl 4(%esp) 89 ; X86: calll __x86_indirect_thunk_eax 90 ; X86: addl $4, %esp 91 ; X86: movl global_fp, %eax 92 ; X86: jmp __x86_indirect_thunk_eax # TAILCALL 93 94 ; X86FAST-LABEL: icall_global_fp: 95 ; X86FAST: calll __x86_indirect_thunk_eax 96 ; X86FAST: jmp __x86_indirect_thunk_eax # TAILCALL 97 98 99 %struct.Foo = type { void (%struct.Foo*)** } 100 101 ; Test an indirect call through a vtable. 102 define void @vcall(%struct.Foo* %obj) #0 { 103 %vptr_field = getelementptr %struct.Foo, %struct.Foo* %obj, i32 0, i32 0 104 %vptr = load void (%struct.Foo*)**, void (%struct.Foo*)*** %vptr_field 105 %vslot = getelementptr void(%struct.Foo*)*, void(%struct.Foo*)** %vptr, i32 1 106 %fp = load void(%struct.Foo*)*, void(%struct.Foo*)** %vslot 107 tail call void %fp(%struct.Foo* %obj) 108 tail call void %fp(%struct.Foo* %obj) 109 ret void 110 } 111 112 ; X64-LABEL: vcall: 113 ; X64: movq %rdi, %[[obj:[^ ]*]] 114 ; X64: movq (%rdi), %[[vptr:[^ ]*]] 115 ; X64: movq 8(%[[vptr]]), %[[fp:[^ ]*]] 116 ; X64: movq %[[fp]], %r11 117 ; X64: callq __x86_indirect_thunk_r11 118 ; X64-DAG: movq %[[obj]], %rdi 119 ; X64-DAG: movq %[[fp]], %r11 120 ; X64: jmp __x86_indirect_thunk_r11 # TAILCALL 121 122 ; X64FAST-LABEL: vcall: 123 ; X64FAST: callq __x86_indirect_thunk_r11 124 ; X64FAST: jmp __x86_indirect_thunk_r11 # TAILCALL 125 126 ; X86-LABEL: vcall: 127 ; X86: movl 8(%esp), %[[obj:[^ ]*]] 128 ; X86: movl (%[[obj]]), %[[vptr:[^ ]*]] 129 ; X86: movl 4(%[[vptr]]), %[[fp:[^ ]*]] 130 ; X86: movl %[[fp]], %eax 131 ; X86: pushl %[[obj]] 132 ; X86: calll __x86_indirect_thunk_eax 133 ; X86: addl $4, %esp 134 ; X86: movl %[[fp]], %eax 135 ; X86: jmp __x86_indirect_thunk_eax # TAILCALL 136 137 ; X86FAST-LABEL: vcall: 138 ; X86FAST: calll __x86_indirect_thunk_eax 139 ; X86FAST: jmp __x86_indirect_thunk_eax # TAILCALL 140 141 142 declare void @direct_callee() 143 144 define void @direct_tail() #0 { 145 tail call void @direct_callee() 146 ret void 147 } 148 149 ; X64-LABEL: direct_tail: 150 ; X64: jmp direct_callee # TAILCALL 151 ; X64FAST-LABEL: direct_tail: 152 ; X64FAST: jmp direct_callee # TAILCALL 153 ; X86-LABEL: direct_tail: 154 ; X86: jmp direct_callee # TAILCALL 155 ; X86FAST-LABEL: direct_tail: 156 ; X86FAST: jmp direct_callee # TAILCALL 157 158 159 ; Lastly check that no thunks were emitted. 160 ; X64-NOT: __{{.*}}_retpoline_{{.*}}: 161 ; X64FAST-NOT: __{{.*}}_retpoline_{{.*}}: 162 ; X86-NOT: __{{.*}}_retpoline_{{.*}}: 163 ; X86FAST-NOT: __{{.*}}_retpoline_{{.*}}: 164 165 166 attributes #0 = { "target-features"="+retpoline-external-thunk" } 167
