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llvm-project/llvm/test/CodeGen/AArch64/wineh-try-catch-cbz.ll

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[AArch64] [Windows] Don't skip constructing UnwindHelp. In certain cases, the first non-frame-setup instruction in a function is a branch. For example, it could be a cbz on an argument. Make sure we correctly allocate the UnwindHelp, and find an appropriate register to use to initialize it. Fixes https://bugs.llvm.org/show_bug.cgi?id=40184 Differential Revision: https://reviews.llvm.org/D58752 llvm-svn: 355136
2019-03-01 04:38:45 +08:00
; RUN: llc < %s | FileCheck %s
; Make sure the prologue is sane. (Doesn't need to exactly match this,
; but the original issue only reproduced if the cbz was immediately
; after the frame setup.)
; CHECK: sub sp, sp, #32
; CHECK-NEXT: stp x29, x30, [sp, #16]
; CHECK-NEXT: add x29, sp, #16
[AArch64] Prefer "mov" over "orr" to materialize constants. This is generally more readable due to the way the assembler aliases work. (This causes a lot of test changes, but it's not really as scary as it looks at first glance; it's just mechanically changing a bunch of checks for orr to check for mov instead.) Differential Revision: https://reviews.llvm.org/D59720 llvm-svn: 356954
2019-03-26 05:25:28 +08:00
; CHECK-NEXT: mov x1, #-2
[AArch64] [Windows] Don't skip constructing UnwindHelp. In certain cases, the first non-frame-setup instruction in a function is a branch. For example, it could be a cbz on an argument. Make sure we correctly allocate the UnwindHelp, and find an appropriate register to use to initialize it. Fixes https://bugs.llvm.org/show_bug.cgi?id=40184 Differential Revision: https://reviews.llvm.org/D58752 llvm-svn: 355136
2019-03-01 04:38:45 +08:00
; CHECK-NEXT: stur x1, [x29, #-16]
; CHECK-NEXT: cbz w0, .LBB0_2
target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-unknown-windows-msvc19.11.0"
; Function Attrs: uwtable
define dso_local void @"?f@@YAXH@Z"(i32 %x) local_unnamed_addr #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
entry:
%cmp = icmp eq i32 %x, 0
br i1 %cmp, label %try.cont, label %if.then
if.then: ; preds = %entry
invoke void @"?g@@YAXXZ"()
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %if.then
%0 = catchswitch within none [label %catch] unwind to caller
catch: ; preds = %catch.dispatch
%1 = catchpad within %0 [i8* null, i32 64, i8* null]
catchret from %1 to label %try.cont
try.cont: ; preds = %entry, %if.then, %catch
ret void
}
declare dso_local void @"?g@@YAXXZ"() local_unnamed_addr #1
declare dso_local i32 @__CxxFrameHandler3(...)