1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -basicaa -tailcallelim -inline -instcombine -dse -S | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; PR7272 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; Calls that capture byval parameters cannot be marked as tail calls. Other 5*9880d681SAndroid Build Coastguard Worker; tails that don't capture byval parameters can still be tail calls. 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Workertarget 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" 8*9880d681SAndroid Build Coastguard Workertarget triple = "i386-pc-linux-gnu" 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Workerdeclare void @ext(i32*) 11*9880d681SAndroid Build Coastguard Worker 12*9880d681SAndroid Build Coastguard Workerdefine void @bar(i32* byval %x) { 13*9880d681SAndroid Build Coastguard Worker call void @ext(i32* %x) 14*9880d681SAndroid Build Coastguard Worker ret void 15*9880d681SAndroid Build Coastguard Worker} 16*9880d681SAndroid Build Coastguard Worker 17*9880d681SAndroid Build Coastguard Workerdefine void @foo(i32* %x) { 18*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: define void @foo( 19*9880d681SAndroid Build Coastguard Worker; CHECK: llvm.lifetime.start 20*9880d681SAndroid Build Coastguard Worker; CHECK: store i32 %2, i32* %x 21*9880d681SAndroid Build Coastguard Worker call void @bar(i32* byval %x) 22*9880d681SAndroid Build Coastguard Worker ret void 23*9880d681SAndroid Build Coastguard Worker} 24*9880d681SAndroid Build Coastguard Worker 25*9880d681SAndroid Build Coastguard Workerdefine internal void @qux(i32* byval %x) { 26*9880d681SAndroid Build Coastguard Worker call void @ext(i32* %x) 27*9880d681SAndroid Build Coastguard Worker tail call void @ext(i32* null) 28*9880d681SAndroid Build Coastguard Worker ret void 29*9880d681SAndroid Build Coastguard Worker} 30*9880d681SAndroid Build Coastguard Worker 31*9880d681SAndroid Build Coastguard Workerdefine void @frob(i32* %x) { 32*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: define void @frob( 33*9880d681SAndroid Build Coastguard Worker; CHECK: %[[POS:.*]] = alloca i32 34*9880d681SAndroid Build Coastguard Worker; CHECK: %[[VAL:.*]] = load i32, i32* %x 35*9880d681SAndroid Build Coastguard Worker; CHECK: store i32 %[[VAL]], i32* %[[POS]] 36*9880d681SAndroid Build Coastguard Worker; CHECK: {{^ *}}call void @ext(i32* nonnull %[[POS]] 37*9880d681SAndroid Build Coastguard Worker; CHECK: tail call void @ext(i32* null) 38*9880d681SAndroid Build Coastguard Worker; CHECK: ret void 39*9880d681SAndroid Build Coastguard Worker tail call void @qux(i32* byval %x) 40*9880d681SAndroid Build Coastguard Worker ret void 41*9880d681SAndroid Build Coastguard Worker} 42