1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -aa-pipeline=basic-aa -passes='function(tailcallelim),cgscc(inline,function(instcombine,dse))' -S | FileCheck %s 3; PR7272 4 5; Calls that capture byval parameters cannot be marked as tail calls. Other 6; 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 void 17; 18 call void @ext(ptr %x) 19 ret void 20} 21 22define void @foo(ptr %x) { 23; CHECK-LABEL: @foo( 24; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4 25; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nonnull [[X1]]) 26; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1 27; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4 28; CHECK-NEXT: call void @ext(ptr nonnull [[X1]]) 29; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nonnull [[X1]]) 30; CHECK-NEXT: ret void 31; 32 call void @bar(ptr byval(i32) %x) 33 ret void 34} 35 36define internal void @qux(ptr byval(i32) %x) { 37 call void @ext(ptr %x) 38 tail call void @ext(ptr null) 39 ret void 40} 41 42define void @frob(ptr %x) { 43; CHECK-LABEL: @frob( 44; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4 45; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nonnull [[X1]]) 46; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1 47; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4 48; 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(i64 4, ptr nonnull [[X1]]) 51; CHECK-NEXT: ret void 52; 53 tail call void @qux(ptr byval(i32) %x) 54 ret void 55} 56 57; A byval parameter passed into a function which is passed out as byval does 58; 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 void 66; 67 call void @ext2(ptr byval(i32) %x) 68 ret void 69} 70 71define void @foobar(ptr %x) { 72; CHECK-LABEL: @foobar( 73; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4 74; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nonnull [[X1]]) 75; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1 76; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4 77; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X1]]) 78; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nonnull [[X1]]) 79; CHECK-NEXT: ret void 80; 81 tail call void @bar2(ptr byval(i32) %x) 82 ret void 83} 84 85define void @barfoo() { 86; CHECK-LABEL: @barfoo( 87; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4 88; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nonnull [[X1]]) 89; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X1]]) 90; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nonnull [[X1]]) 91; CHECK-NEXT: ret void 92; 93 %x = alloca i32 94 tail call void @bar2(ptr byval(i32) %x) 95 ret void 96} 97