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ARM MachO: sort out isTargetDarwin/isTargetIOS/... checks.

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The ARM backend has been using most of the MachO related subtarget
checks almost interchangeably, and since the only target it's had to
run on has been IOS (which is all three of MachO, Darwin and IOS) it's
worked out OK so far.

But we'd like to support embedded targets under the "*-*-none-macho"
triple, which means everything starts falling apart and inconsistent
behaviours emerge.

This patch should pick a reasonably sensible set of behaviours for the
new triple (and any others that come along, with luck). Some choices
were debatable (notably FP == r7 or r11), but we can revisit those
later when deficiencies become apparent.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198617 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover
2014-01-06 14:28:05 +00:00
parent f1c1a7ce44
commit 0aba46f4cd
27 changed files with 201 additions and 94 deletions
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22
test/CodeGen/ARM/fold-stack-adjust.ll
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@@ -1,5 +1,5 @@
; RUN: llc -mtriple=thumbv7-apple-darwin-eabi < %s | FileCheck %s
; RUN: llc -mtriple=thumbv6m-apple-darwin-eabi -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-T1
; RUN: llc -mtriple=thumbv7-apple-none-macho < %s | FileCheck %s
; RUN: llc -mtriple=thumbv6m-apple-none-macho -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-T1
; RUN: llc -mtriple=thumbv7-apple-darwin-ios -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-IOS
@@ -11,11 +11,11 @@ declare void @bar(i8*)
define void @check_simple() minsize {
; CHECK-LABEL: check_simple:
; CHECK: push.w {r7, r8, r9, r10, r11, lr}
; CHECK: push {r3, r4, r5, r6, r7, lr}
; CHECK-NOT: sub sp, sp,
; ...
; CHECK-NOT: add sp, sp,
; CHECK: pop.w {r0, r1, r2, r3, r11, pc}
; CHECK: pop {r0, r1, r2, r3, r7, pc}
; CHECK-T1-LABEL: check_simple:
; CHECK-T1: push {r3, r4, r5, r6, r7, lr}
@@ -43,11 +43,11 @@ define void @check_simple() minsize {
define void @check_simple_too_big() minsize {
; CHECK-LABEL: check_simple_too_big:
; CHECK: push.w {r11, lr}
; CHECK: push {r7, lr}
; CHECK: sub sp,
; ...
; CHECK: add sp,
; CHECK: pop.w {r11, pc}
; CHECK: pop {r7, pc}
%var = alloca i8, i32 64
call void @bar(i8* %var)
ret void
@@ -92,16 +92,16 @@ define void @check_vfp_fold() minsize {
; folded in except that doing so would clobber the value being returned.
define i64 @check_no_return_clobber() minsize {
; CHECK-LABEL: check_no_return_clobber:
; CHECK: push.w {r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, lr}
; CHECK: push {r1, r2, r3, r4, r5, r6, r7, lr}
; CHECK-NOT: sub sp,
; ...
; CHECK: add sp, #40
; CHECK: pop.w {r11, pc}
; CHECK: add sp, #24
; CHECK: pop {r7, pc}
; Just to keep iOS FileCheck within previous function:
; CHECK-IOS-LABEL: check_no_return_clobber:
%var = alloca i8, i32 40
%var = alloca i8, i32 20
call void @bar(i8* %var)
ret i64 0
}
@@ -161,4 +161,4 @@ end:
; We want the epilogue to be the only thing in a basic block so that we hit
; the correct edge-case (first inst in block is correct one to adjust).
ret void
}
}