| ; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s |
| |
| ; When generating DAG selection tables, TableGen used to only flag an |
| ; instruction as needing a chain on its own account if it had a built-in pattern |
| ; which used the chain. This meant that the AArch64 load/stores weren't |
| ; recognised and so both loads from %locvar below were coalesced into a single |
| ; LS8_LDR instruction (same operands other than the non-existent chain) and the |
| ; increment was lost at return. |
| |
| ; This was obviously a Bad Thing. |
| |
| declare void @bar(i8*) |
| |
| define i64 @test_chains() { |
| ; CHECK: test_chains: |
| |
| %locvar = alloca i8 |
| |
| call void @bar(i8* %locvar) |
| ; CHECK: bl bar |
| |
| %inc.1 = load i8* %locvar |
| %inc.2 = zext i8 %inc.1 to i64 |
| %inc.3 = add i64 %inc.2, 1 |
| %inc.4 = trunc i64 %inc.3 to i8 |
| store i8 %inc.4, i8* %locvar |
| ; CHECK: ldrb {{w[0-9]+}}, [sp, [[LOCADDR:#[0-9]+]]] |
| ; CHECK: add {{x[0-9]+}}, {{x[0-9]+}}, #1 |
| ; CHECK: strb {{w[0-9]+}}, [sp, [[LOCADDR]]] |
| ; CHECK: ldrb {{w[0-9]+}}, [sp, [[LOCADDR]]] |
| |
| %ret.1 = load i8* %locvar |
| %ret.2 = zext i8 %ret.1 to i64 |
| ret i64 %ret.2 |
| ; CHECK: ret |
| } |
