| ; RUN: opt -codegenprepare -S < %s | FileCheck %s |
| |
| target triple = "armv8m.main-none-eabi" |
| |
| declare i8* @f0() |
| declare i8* @f1() |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) nounwind |
| |
| define i8* @tail_dup() { |
| ; CHECK-LABEL: tail_dup |
| ; CHECK: tail call i8* @f0() |
| ; CHECK-NEXT: ret i8* |
| ; CHECK: tail call i8* @f1() |
| ; CHECK-NEXT: ret i8* |
| bb0: |
| %a = alloca i32 |
| %a1 = bitcast i32* %a to i8* |
| call void @llvm.lifetime.start.p0i8(i64 -1, i8* %a1) nounwind |
| %tmp0 = tail call i8* @f0() |
| br label %return |
| bb1: |
| %tmp1 = tail call i8* @f1() |
| br label %return |
| return: |
| %retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ] |
| %a2 = bitcast i32* %a to i8* |
| call void @llvm.lifetime.end.p0i8(i64 -1, i8* %a2) nounwind |
| ret i8* %retval |
| } |
| |
| define nonnull i8* @nonnull_dup() { |
| ; CHECK-LABEL: nonnull_dup |
| ; CHECK: tail call i8* @f0() |
| ; CHECK-NEXT: ret i8* |
| ; CHECK: tail call i8* @f1() |
| ; CHECK-NEXT: ret i8* |
| bb0: |
| %tmp0 = tail call i8* @f0() |
| br label %return |
| bb1: |
| %tmp1 = tail call i8* @f1() |
| br label %return |
| return: |
| %retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ] |
| ret i8* %retval |
| } |
| |
| define i8* @noalias_dup() { |
| ; CHECK-LABEL: noalias_dup |
| ; CHECK: tail call noalias i8* @f0() |
| ; CHECK-NEXT: ret i8* |
| ; CHECK: tail call noalias i8* @f1() |
| ; CHECK-NEXT: ret i8* |
| bb0: |
| %tmp0 = tail call noalias i8* @f0() |
| br label %return |
| bb1: |
| %tmp1 = tail call noalias i8* @f1() |
| br label %return |
| return: |
| %retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ] |
| ret i8* %retval |
| } |
| |
| ; Use inreg as a way of testing that attributes (other than nonnull and |
| ; noalias) disable the tailcall duplication in cgp. |
| |
| define inreg i8* @inreg_nodup() { |
| ; CHECK-LABEL: inreg_nodup |
| ; CHECK: tail call i8* @f0() |
| ; CHECK-NEXT: br label %return |
| ; CHECK: tail call i8* @f1() |
| ; CHECK-NEXT: br label %return |
| bb0: |
| %tmp0 = tail call i8* @f0() |
| br label %return |
| bb1: |
| %tmp1 = tail call i8* @f1() |
| br label %return |
| return: |
| %retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ] |
| ret i8* %retval |
| } |