Mercurial > hg > CbC > CbC_llvm
comparison test/CodeGen/Hexagon/tail-dup-subreg-abort.ll @ 100:7d135dc70f03 LLVM 3.9
LLVM 3.9
| author | Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp> |
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| date | Tue, 26 Jan 2016 22:53:40 +0900 |
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| 96:6418606d0ead | 100:7d135dc70f03 |
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| 1 ; RUN: llc -march=hexagon -O2 -disable-cgp < %s | |
| 2 ; REQUIRES: asserts | |
| 3 ; | |
| 4 ; Tail duplication can ignore subregister information on PHI nodes, and as | |
| 5 ; a result, generate COPY instructions between registers of different classes. | |
| 6 ; This could lead to HexagonInstrInfo::copyPhysReg aborting on an unhandled | |
| 7 ; src/dst combination. | |
| 8 ; | |
| 9 define i32 @foo(i32 %x, i64 %y) nounwind { | |
| 10 entry: | |
| 11 %a = icmp slt i32 %x, 0 | |
| 12 %lo = trunc i64 %y to i32 | |
| 13 br i1 %a, label %next, label %tail | |
| 14 tail: | |
| 15 br label %join | |
| 16 next: | |
| 17 %c = icmp eq i32 %x, 0 | |
| 18 br i1 %c, label %b1, label %tail | |
| 19 b1: | |
| 20 %t1 = lshr i64 %y, 32 | |
| 21 %hi = trunc i64 %t1 to i32 | |
| 22 br label %join | |
| 23 join: | |
| 24 %val = phi i32 [ %hi, %b1 ], [ %lo, %tail ] | |
| 25 ret i32 %val | |
| 26 } | |
| 27 | |
| 28 |