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llvm-project/llvm/test/CodeGen/AArch64/win64-no-uwtable.ll

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[AArch64] Fix save register pairing for Windows AAPCS Summary: On Windows, when a function does not have an unwind table (for example, EH filtering funclets), we don't correctly pair FP and LR to form the frame record in all circumstances. Fix this by invalidating a pair when the second register is FP when compiling for Windows, even when CFI is not needed. Fixes PR44271 introduced by D65653. Reviewers: efriedma, sdesmalen, rovka, rengolin, t.p.northover, thegameg, greened Reviewed By: rengolin Subscribers: kristof.beyls, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D71754
2020-01-14 21:16:57 +08:00
; RUN: llc -mtriple=arm64-windows -o - %s | FileCheck %s
declare void @f()
declare void @g()
; Function Attrs: nounwind
define dso_local void @SEHfilter() nounwind "frame-pointer"="all" {
; CHECK-LABEL: @SEHfilter
; CHECK: %bb.0:
; CHECK-NEXT: stp x30, x29, [sp, #-32]!
; CHECK-NEXT: str x19, [sp, #16]
; CHECK-NEXT: ldr w19, [x8]
; CHECK-NEXT: mov x29, sp
; CHECK-NEXT: bl g
; CHECK-NEXT: cbz w19, .LBB0_2
[AArch64] Use '//' as comment string for MSVC assembly As the actual MSVC toolset doesn't use the GAS-style assembly that Clang/LLVM produces and consumes, there's no reference for what string to use for e.g. comments when building with a MSVC triple. This frees up the use of semicolon as separator string, just like was done for GNU targets in 23413195649d0cf6f3860ae8b5fb115b35032075. (Previously, both the separator and comment strings were set to the same, a semicolon.) Compiler-rt extensively uses separator chars in its assembly, and that assembly should be buildable with clang-cl for MSVC too. Differential Revision: https://reviews.llvm.org/D96259
2021-02-08 21:24:42 +08:00
; CHECK-NEXT: // %bb.1:
[AArch64] Fix save register pairing for Windows AAPCS Summary: On Windows, when a function does not have an unwind table (for example, EH filtering funclets), we don't correctly pair FP and LR to form the frame record in all circumstances. Fix this by invalidating a pair when the second register is FP when compiling for Windows, even when CFI is not needed. Fixes PR44271 introduced by D65653. Reviewers: efriedma, sdesmalen, rovka, rengolin, t.p.northover, thegameg, greened Reviewed By: rengolin Subscribers: kristof.beyls, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D71754
2020-01-14 21:16:57 +08:00
; CHECK-NEXT: ldr x19, [sp, #16]
; CHECK-NEXT: ldp x30, x29, [sp], #32
; CHECK-NEXT: ret
[AArch64] Use '//' as comment string for MSVC assembly As the actual MSVC toolset doesn't use the GAS-style assembly that Clang/LLVM produces and consumes, there's no reference for what string to use for e.g. comments when building with a MSVC triple. This frees up the use of semicolon as separator string, just like was done for GNU targets in 23413195649d0cf6f3860ae8b5fb115b35032075. (Previously, both the separator and comment strings were set to the same, a semicolon.) Compiler-rt extensively uses separator chars in its assembly, and that assembly should be buildable with clang-cl for MSVC too. Differential Revision: https://reviews.llvm.org/D96259
2021-02-08 21:24:42 +08:00
; CHECK-NEXT: .LBB0_2: // %if.end.i
[AArch64] Fix save register pairing for Windows AAPCS Summary: On Windows, when a function does not have an unwind table (for example, EH filtering funclets), we don't correctly pair FP and LR to form the frame record in all circumstances. Fix this by invalidating a pair when the second register is FP when compiling for Windows, even when CFI is not needed. Fixes PR44271 introduced by D65653. Reviewers: efriedma, sdesmalen, rovka, rengolin, t.p.northover, thegameg, greened Reviewed By: rengolin Subscribers: kristof.beyls, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D71754
2020-01-14 21:16:57 +08:00
; CHECK-NEXT: bl f
; CHECK-NEXT: brk #0x1
%1 = load i32, i32* undef, align 4
tail call void @g()
%tobool.i = icmp eq i32 %1, 0
br i1 %tobool.i, label %if.end.i, label %exit
if.end.i:
call void @f()
unreachable
exit:
ret void
}