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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -aa-pipeline=basic-aa -passes='function(tailcallelim),cgscc(inline,function(instcombine,dse))' -S | FileCheck %s3; PR72724 5; Calls that capture byval parameters cannot be marked as tail calls. Other6; tails that don't capture byval parameters can still be tail calls.7 8target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"9target triple = "i386-pc-linux-gnu"10 11declare void @ext(ptr)12 13define void @bar(ptr byval(i32) %x) {14; CHECK-LABEL: @bar(15; CHECK-NEXT: call void @ext(ptr nonnull [[X:%.*]])16; CHECK-NEXT: ret void17;18 call void @ext(ptr %x)19 ret void20}21 22define void @foo(ptr %x) {23; CHECK-LABEL: @foo(24; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 425; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X1]])26; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 127; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 428; CHECK-NEXT: call void @ext(ptr nonnull [[X1]])29; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X1]])30; CHECK-NEXT: ret void31;32 call void @bar(ptr byval(i32) %x)33 ret void34}35 36define internal void @qux(ptr byval(i32) %x) {37 call void @ext(ptr %x)38 tail call void @ext(ptr null)39 ret void40}41 42define void @frob(ptr %x) {43; CHECK-LABEL: @frob(44; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 445; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X1]])46; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 147; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 448; CHECK-NEXT: call void @ext(ptr nonnull [[X1]])49; CHECK-NEXT: tail call void @ext(ptr null)50; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X1]])51; CHECK-NEXT: ret void52;53 tail call void @qux(ptr byval(i32) %x)54 ret void55}56 57; A byval parameter passed into a function which is passed out as byval does58; not block the call from being marked as tail.59 60declare void @ext2(ptr byval(i32))61 62define void @bar2(ptr byval(i32) %x) {63; CHECK-LABEL: @bar2(64; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X:%.*]])65; CHECK-NEXT: ret void66;67 call void @ext2(ptr byval(i32) %x)68 ret void69}70 71define void @foobar(ptr %x) {72; CHECK-LABEL: @foobar(73; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 474; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X1]])75; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 176; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 477; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X1]])78; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X1]])79; CHECK-NEXT: ret void80;81 tail call void @bar2(ptr byval(i32) %x)82 ret void83}84 85define void @barfoo() {86; CHECK-LABEL: @barfoo(87; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 488; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X1]])89; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X1]])90; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X1]])91; CHECK-NEXT: ret void92;93 %x = alloca i3294 tail call void @bar2(ptr byval(i32) %x)95 ret void96}97