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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.)
[AArch64] Change AArch64 Windows EH UnwindHelp object to be a fixed object The UnwindHelp object is used during exception handling by runtime code. It must be findable from a fixed offset from FP. This change allocates the UnwindHelp object as a fixed object (as is done for x86_64) to ensure that both the generated code and runtime agree on the location of the object. Fixes https://bugs.llvm.org/show_bug.cgi?id=45346 Differential Revision: https://reviews.llvm.org/D77016
2020-04-01 04:12:54 +08:00
; CHECK: stp x29, x30, [sp, #-32]!
[AArch64] Generate and parse SEH assembly directives This ensures that you get the same output regardless if generating code directly to an object file or if generating assembly and assembling that. Add implementations of the EmitARM64WinCFI*() methods in AArch64TargetAsmStreamer, and fill in one blank in MCAsmStreamer. Add corresponding directive handlers in AArch64AsmParser and COFFAsmParser. Some SEH directive names have been picked to match the prior art for SEH assembly directives for x86_64, e.g. the spelling of ".seh_startepilogue" matching the preexisting ".seh_endprologue". For the directives for saving registers, the exact spelling from the arm64 documentation is picked, e.g. ".seh_save_reg" (to follow that naming for all the other ones, e.g. ".seh_save_fregp_x"), while the corresponding one for x86_64 is plain ".seh_savereg" without the second underscore. Directives in the epilogues have the same names as in prologues, e.g. .seh_savereg, even though the registers are restored, not saved, at that point. Differential Revision: https://reviews.llvm.org/D86529
2020-08-07 17:44:48 +08:00
; CHECK-NEXT: .seh_save_fplr_x 32
[AArch64] Change AArch64 Windows EH UnwindHelp object to be a fixed object The UnwindHelp object is used during exception handling by runtime code. It must be findable from a fixed offset from FP. This change allocates the UnwindHelp object as a fixed object (as is done for x86_64) to ensure that both the generated code and runtime agree on the location of the object. Fixes https://bugs.llvm.org/show_bug.cgi?id=45346 Differential Revision: https://reviews.llvm.org/D77016
2020-04-01 04:12:54 +08:00
; CHECK-NEXT: mov x29, sp
[AArch64] Generate and parse SEH assembly directives This ensures that you get the same output regardless if generating code directly to an object file or if generating assembly and assembling that. Add implementations of the EmitARM64WinCFI*() methods in AArch64TargetAsmStreamer, and fill in one blank in MCAsmStreamer. Add corresponding directive handlers in AArch64AsmParser and COFFAsmParser. Some SEH directive names have been picked to match the prior art for SEH assembly directives for x86_64, e.g. the spelling of ".seh_startepilogue" matching the preexisting ".seh_endprologue". For the directives for saving registers, the exact spelling from the arm64 documentation is picked, e.g. ".seh_save_reg" (to follow that naming for all the other ones, e.g. ".seh_save_fregp_x"), while the corresponding one for x86_64 is plain ".seh_savereg" without the second underscore. Directives in the epilogues have the same names as in prologues, e.g. .seh_savereg, even though the registers are restored, not saved, at that point. Differential Revision: https://reviews.llvm.org/D86529
2020-08-07 17:44:48 +08:00
; CHECK-NEXT: .seh_set_fp
; CHECK-NEXT: .seh_endprologue
[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] Change AArch64 Windows EH UnwindHelp object to be a fixed object The UnwindHelp object is used during exception handling by runtime code. It must be findable from a fixed offset from FP. This change allocates the UnwindHelp object as a fixed object (as is done for x86_64) to ensure that both the generated code and runtime agree on the location of the object. Fixes https://bugs.llvm.org/show_bug.cgi?id=45346 Differential Revision: https://reviews.llvm.org/D77016
2020-04-01 04:12:54 +08:00
; CHECK-NEXT: stur x1, [x29, #16]
[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: 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(...)