; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s ; Test lowering of @llvm.frameaddress with packed-stack. ; With back chain attributes #0 = { nounwind "packed-stack" "backchain" "use-soft-float"="true" } define ptr @fp0() #0 { entry: ; CHECK-LABEL: fp0: ; CHECK: la %r2, 152(%r15) ; CHECK-NEXT: br %r14 %0 = tail call ptr @llvm.frameaddress(i32 0) ret ptr %0 } define ptr @fp0f() #0 { entry: ; CHECK-LABEL: fp0f: ; CHECK: lgr %r1, %r15 ; CHECK-NEXT: aghi %r15, -16 ; CHECK-NEXT: stg %r1, 152(%r15) ; CHECK-NEXT: la %r2, 168(%r15) ; CHECK-NEXT: aghi %r15, 16 ; CHECK-NEXT: br %r14 %0 = alloca i64, align 8 %1 = tail call ptr @llvm.frameaddress(i32 0) ret ptr %1 } ; Check the caller's frame address. define ptr @fpcaller() #0 { entry: ; CHECK-LABEL: fpcaller: ; CHECK: lghi %r2, 152 ; CHECK: ag %r2, 152(%r15) ; CHECK: br %r14 %0 = tail call ptr @llvm.frameaddress(i32 1) ret ptr %0 } ; Check the caller's caller's frame address. define ptr @fpcallercaller() #0 { entry: ; CHECK-LABEL: fpcallercaller: ; CHECK: lg %r1, 152(%r15) ; CHECK: lghi %r2, 152 ; CHECK: ag %r2, 152(%r1) ; CHECK: br %r14 %0 = tail call ptr @llvm.frameaddress(i32 2) ret ptr %0 } ; Without back chain attributes #1 = { nounwind "packed-stack" } define ptr @fp1() #1 { entry: ; CHECK-LABEL: fp1: ; CHECK: la %r2, 152(%r15) ; CHECK-NEXT: br %r14 %0 = tail call ptr @llvm.frameaddress(i32 0) ret ptr %0 } ; No saved registers: returning address of unused slot where backcahin would ; have been located. define ptr @fp1f() #1 { entry: ; CHECK-LABEL: fp1f: ; CHECK: aghi %r15, -16 ; CHECK-NEXT: la %r2, 168(%r15) ; CHECK-NEXT: aghi %r15, 16 ; CHECK-NEXT: br %r14 %0 = alloca i64, align 8 %1 = tail call ptr @llvm.frameaddress(i32 0) ret ptr %1 } ; Saved registers: returning address for first saved GPR. declare void @foo(ptr %Arg) define ptr @fp2() #1 { entry: ; CHECK-LABEL: fp2: ; CHECK: stmg %r14, %r15, 144(%r15) ; CHECK-NEXT: aghi %r15, -16 ; CHECK-NEXT: la %r2, 168(%r15) ; CHECK-NEXT: brasl %r14, foo@PLT ; CHECK-NEXT: la %r2, 168(%r15) ; CHECK-NEXT: lmg %r14, %r15, 160(%r15) ; CHECK-NEXT: br %r14 %0 = tail call ptr @llvm.frameaddress(i32 0) call void @foo(ptr %0); ret ptr %0 } declare ptr @llvm.frameaddress(i32) nounwind readnone