llvm-mirror/test/CodeGen/ARM/2011-06-16-TailCallByVal.ll

; RUN: llc < %s -arm-tail-calls=1 | FileCheck %s

; tail call inside a function where byval argument is splitted between
; registers and stack is currently unsupported.
; XFAIL: *

target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:64-v128:32:128-a0:0:32-n32"
target triple = "thumbv7-apple-ios"

%struct.A = type <{ i16, i16, i32, i16, i16, i32, i16, [8 x %struct.B], [418 x i8], %struct.C }>
%struct.B = type <{ i32, i16, i16 }>
%struct.C = type { i16, i32, i16, i16 }

; CHECK: f
; CHECK: push {r1, r2, r3}
; CHECK: add sp, #12
; CHECK: b.w _puts

define void @f(i8* %s, %struct.A* nocapture byval %a) nounwind optsize {
entry:
  %puts = tail call i32 @puts(i8* %s)
  ret void
}

declare i32 @puts(i8* nocapture) nounwind
Update an insertion point iterator after replacing a return instruction with a tail call pseudoinstruction. This fixes <rdar://problem/9624333>. llvm-svn: 133227 2011-06-17 04:16:43 +02:00			`; RUN: llc < %s -arm-tail-calls=1 \| FileCheck %s`
ARM: tail-call inside a function where part of a byval argument is on caller's local frame causes problem. For example: void f(StructToPass s) { g(&s, sizeof(s)); } will cause problem with tail-call since part of s is passed via registers and saved in f's local frame. When g tries to access s, part of s may be corrupted since f's local frame is popped out before the tail-call. The current fix is to disable tail-call if getVarArgsRegSaveSize is not 0 for the caller. This is a conservative approach, if we can prove the address of s or part of s is not taken and passed to g, it should be okay to perform tail-call. rdar://12442472 llvm-svn: 165853 2012-10-13 01:39:43 +02:00
			`; tail call inside a function where byval argument is splitted between`
			`; registers and stack is currently unsupported.`
			`; XFAIL: *`

Update an insertion point iterator after replacing a return instruction with a tail call pseudoinstruction. This fixes <rdar://problem/9624333>. llvm-svn: 133227 2011-06-17 04:16:43 +02:00			`target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:64-v128:32:128-a0:0:32-n32"`
ARM target code clean up. Check for iOS, not Darwin where it makes sense. llvm-svn: 146981 2011-12-20 19:26:50 +01:00			`target triple = "thumbv7-apple-ios"`
Update an insertion point iterator after replacing a return instruction with a tail call pseudoinstruction. This fixes <rdar://problem/9624333>. llvm-svn: 133227 2011-06-17 04:16:43 +02:00
			`%struct.A = type <{ i16, i16, i32, i16, i16, i32, i16, [8 x %struct.B], [418 x i8], %struct.C }>`
			`%struct.B = type <{ i32, i16, i16 }>`
			`%struct.C = type { i16, i32, i16, i16 }`

			`; CHECK: f`
			`; CHECK: push {r1, r2, r3}`
			`; CHECK: add sp, #12`
			`; CHECK: b.w _puts`

			`define void @f(i8* %s, %struct.A* nocapture byval %a) nounwind optsize {`
			`entry:`
			`%puts = tail call i32 @puts(i8* %s)`
			`ret void`
			`}`

			`declare i32 @puts(i8* nocapture) nounwind`