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83 lines
3.1 KiB
LLVM
83 lines
3.1 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=armv7k-apple-ios8.0 -mcpu=cortex-a7 -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT --check-prefix=TAILCALL %s
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; RUN: llc -O0 -verify-machineinstrs -mtriple=armv7k-apple-ios8.0 -mcpu=cortex-a7 -o - %s | FileCheck %s
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; RUN: llc -verify-machineinstrs -mtriple=armv7-apple-ios -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s
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; RUN: llc -O0 -verify-machineinstrs -mtriple=armv7-apple-ios -o - %s | FileCheck %s
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; Parameter with swiftself should be allocated to r10.
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; CHECK-LABEL: swiftself_param:
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; CHECK: mov r0, r10
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define i8 *@swiftself_param(i8* swiftself %addr0) "frame-pointer"="all" {
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ret i8 *%addr0
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}
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; Check that r10 is used to pass a swiftself argument.
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; CHECK-LABEL: call_swiftself:
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; CHECK: mov r10, r0
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; CHECK: bl {{_?}}swiftself_param
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define i8 *@call_swiftself(i8* %arg) "frame-pointer"="all" {
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%res = call i8 *@swiftself_param(i8* swiftself %arg)
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ret i8 *%res
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}
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; r10 should be saved by the callee even if used for swiftself
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; CHECK-LABEL: swiftself_clobber:
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; CHECK: push {r10}
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; ...
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; CHECK: pop {r10}
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define i8 *@swiftself_clobber(i8* swiftself %addr0) "frame-pointer"="all" {
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call void asm sideeffect "", "~{r10}"()
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ret i8 *%addr0
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}
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; Demonstrate that we do not need any movs when calling multiple functions
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; with swiftself argument.
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; CHECK-LABEL: swiftself_passthrough:
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; OPT-NOT: mov{{.*}}r10
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; OPT: bl {{_?}}swiftself_param
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; OPT-NOT: mov{{.*}}r10
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; OPT-NEXT: bl {{_?}}swiftself_param
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define void @swiftself_passthrough(i8* swiftself %addr0) "frame-pointer"="all" {
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call i8 *@swiftself_param(i8* swiftself %addr0)
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call i8 *@swiftself_param(i8* swiftself %addr0)
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ret void
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}
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; We can use a tail call if the callee swiftself is the same as the caller one.
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; CHECK-LABEL: swiftself_tail:
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; TAILCALL: b {{_?}}swiftself_param
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; TAILCALL-NOT: pop
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define i8* @swiftself_tail(i8* swiftself %addr0) "frame-pointer"="all" {
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call void asm sideeffect "", "~{r10}"()
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%res = tail call i8* @swiftself_param(i8* swiftself %addr0)
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ret i8* %res
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}
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; We can not use a tail call if the callee swiftself is not the same as the
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; caller one.
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; CHECK-LABEL: swiftself_notail:
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; CHECK: mov r10, r0
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; CHECK: bl {{_?}}swiftself_param
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; CHECK: pop
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define i8* @swiftself_notail(i8* swiftself %addr0, i8* %addr1) nounwind "frame-pointer"="all" {
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%res = tail call i8* @swiftself_param(i8* swiftself %addr1)
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ret i8* %res
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}
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; We cannot pretend that 'r0' is alive across the thisreturn_attribute call as
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; we normally would. We marked the first parameter with swiftself which means it
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; will no longer be passed in r0.
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declare swiftcc i8* @thisreturn_attribute(i8* returned swiftself)
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; OPT-LABEL: swiftself_nothisreturn:
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; OPT-DAG: mov [[CSREG:r[1-9].*]], r0
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; OPT-DAG: ldr r10, [r10]
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; OPT: bl {{_?}}thisreturn_attribute
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; OPT: str r0, {{\[}}[[CSREG]]
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define hidden swiftcc void @swiftself_nothisreturn(i8** noalias nocapture sret(i8**), i8** noalias nocapture readonly swiftself) {
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entry:
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%2 = load i8*, i8** %1, align 8
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%3 = tail call swiftcc i8* @thisreturn_attribute(i8* swiftself %2)
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store i8* %3, i8** %0, align 8
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ret void
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}
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