| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt -codegenprepare -S < %s | FileCheck %s |
| 2 | |
| 3 | target triple = "armv8m.main-none-eabi" |
| 4 | |
| 5 | declare i8* @f0() |
| 6 | declare i8* @f1() |
| 7 | |
| 8 | define i8* @tail_dup() { |
| 9 | ; CHECK-LABEL: tail_dup |
| 10 | ; CHECK: tail call i8* @f0() |
| 11 | ; CHECK-NEXT: ret i8* |
| 12 | ; CHECK: tail call i8* @f1() |
| 13 | ; CHECK-NEXT: ret i8* |
| 14 | bb0: |
| 15 | %tmp0 = tail call i8* @f0() |
| 16 | br label %return |
| 17 | bb1: |
| 18 | %tmp1 = tail call i8* @f1() |
| 19 | br label %return |
| 20 | return: |
| 21 | %retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ] |
| 22 | ret i8* %retval |
| 23 | } |
| 24 | |
| 25 | define nonnull i8* @nonnull_dup() { |
| 26 | ; CHECK-LABEL: nonnull_dup |
| 27 | ; CHECK: tail call i8* @f0() |
| 28 | ; CHECK-NEXT: ret i8* |
| 29 | ; CHECK: tail call i8* @f1() |
| 30 | ; CHECK-NEXT: ret i8* |
| 31 | bb0: |
| 32 | %tmp0 = tail call i8* @f0() |
| 33 | br label %return |
| 34 | bb1: |
| 35 | %tmp1 = tail call i8* @f1() |
| 36 | br label %return |
| 37 | return: |
| 38 | %retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ] |
| 39 | ret i8* %retval |
| 40 | } |
| 41 | |
| 42 | define i8* @noalias_dup() { |
| 43 | ; CHECK-LABEL: noalias_dup |
| 44 | ; CHECK: tail call noalias i8* @f0() |
| 45 | ; CHECK-NEXT: ret i8* |
| 46 | ; CHECK: tail call noalias i8* @f1() |
| 47 | ; CHECK-NEXT: ret i8* |
| 48 | bb0: |
| 49 | %tmp0 = tail call noalias i8* @f0() |
| 50 | br label %return |
| 51 | bb1: |
| 52 | %tmp1 = tail call noalias i8* @f1() |
| 53 | br label %return |
| 54 | return: |
| 55 | %retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ] |
| 56 | ret i8* %retval |
| 57 | } |
| 58 | |
| 59 | ; Use inreg as a way of testing that attributes (other than nonnull and |
| 60 | ; noalias) disable the tailcall duplication in cgp. |
| 61 | |
| 62 | define inreg i8* @inreg_nodup() { |
| 63 | ; CHECK-LABEL: inreg_nodup |
| 64 | ; CHECK: tail call i8* @f0() |
| 65 | ; CHECK-NEXT: br label %return |
| 66 | ; CHECK: tail call i8* @f1() |
| 67 | ; CHECK-NEXT: br label %return |
| 68 | bb0: |
| 69 | %tmp0 = tail call i8* @f0() |
| 70 | br label %return |
| 71 | bb1: |
| 72 | %tmp1 = tail call i8* @f1() |
| 73 | br label %return |
| 74 | return: |
| 75 | %retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ] |
| 76 | ret i8* %retval |
| 77 | } |