eh_save_restore.ll
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; RUN: llc -O3 -march=hexagon -hexagon-small-data-threshold=0 -disable-packetizer < %s | FileCheck %s
; This test was orignally written to test that we don't save an entire double
; register if only one of the integer registers needs to be saved. The problem
; occurs in exception handling, which only emit information for the registers
; in the callee saved list (and not complete double registers unless both
; parts of the double registers are used).
; Overtime, we evolved in to saving the double register and updating the debug
; information to cover the entire double register.
; Disable the packetizer to avoid complications caused by potentially
; packetizing one of the stores with allocframe, which would change the
; relative order of the stores with the CFI instructions.
; CHECK: cfi_startproc
; CHECK-DAG: cfi_offset r16
; CHECK-DAG: cfi_offset r17
; CHECK-DAG: cfi_offset r18
; CHECK-DAG: cfi_offset r19
; CHECK: memd(r29+{{.*}}) = r17:16
; CHECK: memd(r29+{{.*}}) = r19:18
%s.0 = type { i32 }
@g0 = global i32 0, align 4
@g1 = external constant i8*
; Function Attrs: noreturn
define void @f0(i64 %a0) #0 personality i8* bitcast (i32 (...)* @f2 to i8*) {
b0:
%v0 = alloca %s.0, align 4
%v1 = trunc i64 %a0 to i32
%v2 = lshr i64 %a0, 32
%v3 = trunc i64 %v2 to i32
%v4 = getelementptr inbounds %s.0, %s.0* %v0, i32 0, i32 0
store i32 0, i32* %v4, align 4, !tbaa !0
%v5 = load i32, i32* @g0, align 4, !tbaa !5
%v6 = or i32 %v5, 1
store i32 %v6, i32* @g0, align 4, !tbaa !5
%v7 = call i8* @f1(i32 4) #1
%v8 = bitcast i8* %v7 to i32*
%v9 = bitcast %s.0* %v0 to i8*
%v10 = getelementptr inbounds i8, i8* %v9, i32 %v3
%v11 = bitcast i8* %v10 to %s.0*
%v12 = and i32 %v1, 1
%v13 = icmp eq i32 %v12, 0
br i1 %v13, label %b2, label %b1
b1: ; preds = %b0
%v14 = bitcast i8* %v10 to i8**
%v15 = load i8*, i8** %v14, align 4
%v16 = add i32 %v1, -1
%v17 = getelementptr i8, i8* %v15, i32 %v16
%v18 = bitcast i8* %v17 to i32 (%s.0*)**
%v19 = load i32 (%s.0*)*, i32 (%s.0*)** %v18, align 4
br label %b3
b2: ; preds = %b0
%v20 = inttoptr i32 %v1 to i32 (%s.0*)*
br label %b3
b3: ; preds = %b2, %b1
%v21 = phi i32 (%s.0*)* [ %v19, %b1 ], [ %v20, %b2 ]
%v22 = invoke i32 %v21(%s.0* %v11)
to label %b4 unwind label %b5
b4: ; preds = %b3
store i32 %v22, i32* %v8, align 4, !tbaa !5
call void @f4(i8* %v7, i8* bitcast (i8** @g1 to i8*), i8* null) #2
unreachable
b5: ; preds = %b3
%v23 = landingpad { i8*, i32 }
cleanup
call void @f3(i8* %v7) #1
resume { i8*, i32 } %v23
}
declare i8* @f1(i32)
declare i32 @f2(...)
declare void @f3(i8*)
declare void @f4(i8*, i8*, i8*)
attributes #0 = { noreturn "target-cpu"="hexagonv55" }
attributes #1 = { nounwind }
attributes #2 = { noreturn }
!0 = !{!1, !2, i64 0}
!1 = !{!"_ZTS1A", !2, i64 0}
!2 = !{!"int", !3, i64 0}
!3 = !{!"omnipotent char", !4, i64 0}
!4 = !{!"Simple C/C++ TBAA"}
!5 = !{!2, !2, i64 0}