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llvm-mirror/test/CodeGen/ARM/swiftself.ll

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ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
; 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
; RUN: llc -O0 -verify-machineinstrs -mtriple=armv7k-apple-ios8.0 -mcpu=cortex-a7 -o - %s | FileCheck %s
Swift Calling Convention: add swiftself attribute. Differential Revision: http://reviews.llvm.org/D17866 llvm-svn: 264754
2016-03-29 19:37:21 +02:00
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
; RUN: llc -verify-machineinstrs -mtriple=armv7-apple-ios -o - %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s
; RUN: llc -O0 -verify-machineinstrs -mtriple=armv7-apple-ios -o - %s | FileCheck %s
Swift Calling Convention: add swiftself attribute. Differential Revision: http://reviews.llvm.org/D17866 llvm-svn: 264754
2016-03-29 19:37:21 +02:00
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
; Parameter with swiftself should be allocated to r10.
; CHECK-LABEL: swiftself_param:
; CHECK: mov r0, r10
Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351
2019-12-25 00:52:21 +01:00
define i8 *@swiftself_param(i8* swiftself %addr0) "frame-pointer"="all" {
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
ret i8 *%addr0
}
Swift Calling Convention: add swiftself attribute. Differential Revision: http://reviews.llvm.org/D17866 llvm-svn: 264754
2016-03-29 19:37:21 +02:00
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
; Check that r10 is used to pass a swiftself argument.
; CHECK-LABEL: call_swiftself:
; CHECK: mov r10, r0
; CHECK: bl {{_?}}swiftself_param
Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351
2019-12-25 00:52:21 +01:00
define i8 *@call_swiftself(i8* %arg) "frame-pointer"="all" {
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
%res = call i8 *@swiftself_param(i8* swiftself %arg)
ret i8 *%res
Swift Calling Convention: add swiftself attribute. Differential Revision: http://reviews.llvm.org/D17866 llvm-svn: 264754
2016-03-29 19:37:21 +02:00
}
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
; r10 should be saved by the callee even if used for swiftself
; CHECK-LABEL: swiftself_clobber:
; CHECK: push {r10}
; ...
; CHECK: pop {r10}
Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351
2019-12-25 00:52:21 +01:00
define i8 *@swiftself_clobber(i8* swiftself %addr0) "frame-pointer"="all" {
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
call void asm sideeffect "", "~{r10}"()
ret i8 *%addr0
}
Swift Calling Convention: add swiftself attribute. Differential Revision: http://reviews.llvm.org/D17866 llvm-svn: 264754
2016-03-29 19:37:21 +02:00
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
; Demonstrate that we do not need any movs when calling multiple functions
; with swiftself argument.
; CHECK-LABEL: swiftself_passthrough:
; OPT-NOT: mov{{.*}}r10
; OPT: bl {{_?}}swiftself_param
; OPT-NOT: mov{{.*}}r10
; OPT-NEXT: bl {{_?}}swiftself_param
Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351
2019-12-25 00:52:21 +01:00
define void @swiftself_passthrough(i8* swiftself %addr0) "frame-pointer"="all" {
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
call i8 *@swiftself_param(i8* swiftself %addr0)
call i8 *@swiftself_param(i8* swiftself %addr0)
ret void
}
Swift Calling Convention: add swiftself attribute. Differential Revision: http://reviews.llvm.org/D17866 llvm-svn: 264754
2016-03-29 19:37:21 +02:00
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
; We can use a tail call if the callee swiftself is the same as the caller one.
; CHECK-LABEL: swiftself_tail:
; TAILCALL: b {{_?}}swiftself_param
; TAILCALL-NOT: pop
Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351
2019-12-25 00:52:21 +01:00
define i8* @swiftself_tail(i8* swiftself %addr0) "frame-pointer"="all" {
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
call void asm sideeffect "", "~{r10}"()
%res = tail call i8* @swiftself_param(i8* swiftself %addr0)
ret i8* %res
}
Swift Calling Convention: add swiftself attribute. Differential Revision: http://reviews.llvm.org/D17866 llvm-svn: 264754
2016-03-29 19:37:21 +02:00
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
; We can not use a tail call if the callee swiftself is not the same as the
; caller one.
; CHECK-LABEL: swiftself_notail:
; CHECK: mov r10, r0
; CHECK: bl {{_?}}swiftself_param
; CHECK: pop
Migrate function attribute "no-frame-pointer-elim" to "frame-pointer"="all" as cleanups after D56351
2019-12-25 00:52:21 +01:00
define i8* @swiftself_notail(i8* swiftself %addr0, i8* %addr1) nounwind "frame-pointer"="all" {
ARM: Use a callee save register for the swiftself parameter. It is very likely that the swiftself parameter is alive throughout most functions function so putting it into a callee save register should avoid spills for the callers with only a minimum amount of extra spills in the callees. Currently the generated code is correct but unnecessarily spills and reloads arguments passed in callee save registers, I will address this in upcoming patches. This also adds a missing check that for tail calls the preserved value of the caller must be the same as the callees parameter. Differential Revision: http://reviews.llvm.org/D18901 llvm-svn: 266253
2016-04-13 23:43:25 +02:00
%res = tail call i8* @swiftself_param(i8* swiftself %addr1)
ret i8* %res
Swift Calling Convention: add swiftself attribute. Differential Revision: http://reviews.llvm.org/D17866 llvm-svn: 264754
2016-03-29 19:37:21 +02:00
}
[ARM/AArch ISel] SwiftCC: First parameters that are marked swiftself are not 'this returns' We mark X0 as preserved by a call that passes the returned parameter. x0 = ... fun(x0) // no implicit def of x0 This no longer is valid if we pass the parameter in a different register then the returned value as is the case with a swiftself parameter (passed in x20). x20 = ... fun(x20) // there should be an implict def of x8 rdar://30425845 llvm-svn: 294527
2017-02-08 23:30:47 +01:00
; We cannot pretend that 'r0' is alive across the thisreturn_attribute call as
; we normally would. We marked the first parameter with swiftself which means it
; will no longer be passed in r0.
declare swiftcc i8* @thisreturn_attribute(i8* returned swiftself)
; OPT-LABEL: swiftself_nothisreturn:
; OPT-DAG: mov [[CSREG:r[1-9].*]], r0
; OPT-DAG: ldr r10, [r10]
; OPT: bl {{_?}}thisreturn_attribute
; OPT: str r0, {{\[}}[[CSREG]]
OpaquePtr: Update more tests to use typed sret
2020-11-21 01:02:42 +01:00
define hidden swiftcc void @swiftself_nothisreturn(i8** noalias nocapture sret(i8**), i8** noalias nocapture readonly swiftself) {
[ARM/AArch ISel] SwiftCC: First parameters that are marked swiftself are not 'this returns' We mark X0 as preserved by a call that passes the returned parameter. x0 = ... fun(x0) // no implicit def of x0 This no longer is valid if we pass the parameter in a different register then the returned value as is the case with a swiftself parameter (passed in x20). x20 = ... fun(x20) // there should be an implict def of x8 rdar://30425845 llvm-svn: 294527
2017-02-08 23:30:47 +01:00
entry:
%2 = load i8*, i8** %1, align 8
%3 = tail call swiftcc i8* @thisreturn_attribute(i8* swiftself %2)
store i8* %3, i8** %0, align 8
ret void
}
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