| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -mtriple aarch64 -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs %s -o - | FileCheck %s |
| |
| name: pat1 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x0, $x1 |
| ; Fold ((0-A) + B) -> B - A |
| ; CHECK-LABEL: name: pat1 |
| ; CHECK: liveins: $x0, $x1 |
| ; CHECK: %copy1:_(s64) = COPY $x0 |
| ; CHECK: %copy2:_(s64) = COPY $x1 |
| ; CHECK: %add:_(s64) = G_SUB %copy2, %copy1 |
| ; CHECK: $x0 = COPY %add(s64) |
| ; CHECK: RET_ReallyLR implicit $x0 |
| %copy1:_(s64) = COPY $x0 |
| %copy2:_(s64) = COPY $x1 |
| %zero:_(s64) = G_CONSTANT i64 0 |
| %sub:_(s64) = G_SUB %zero, %copy1 |
| %add:_(s64) = G_ADD %sub, %copy2 |
| $x0 = COPY %add(s64) |
| RET_ReallyLR implicit $x0 |
| |
| ... |
| --- |
| name: pat2 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x0, $x1 |
| ; Fold (A + (0-B)) -> A - B |
| ; CHECK-LABEL: name: pat2 |
| ; CHECK: liveins: $x0, $x1 |
| ; CHECK: %copy1:_(s64) = COPY $x0 |
| ; CHECK: %copy2:_(s64) = COPY $x1 |
| ; CHECK: %add:_(s64) = G_SUB %copy1, %copy2 |
| ; CHECK: $x0 = COPY %add(s64) |
| ; CHECK: RET_ReallyLR implicit $x0 |
| %copy1:_(s64) = COPY $x0 |
| %copy2:_(s64) = COPY $x1 |
| %zero:_(s64) = G_CONSTANT i64 0 |
| %sub:_(s64) = G_SUB %zero, %copy2 |
| %add:_(s64) = G_ADD %copy1, %sub |
| $x0 = COPY %add(s64) |
| RET_ReallyLR implicit $x0 |
| |
| ... |