| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -O0 -mtriple=aarch64 -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s |
| # |
| # Verify that we can fold compares into integer selects. |
| # |
| # This is an integer version of fold-fp-select.mir. |
| # |
| |
| ... |
| --- |
| name: eq |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $w0, $w1 |
| |
| ; CHECK-LABEL: name: eq |
| ; CHECK: liveins: $w0, $w1 |
| ; CHECK: [[COPY:%[0-9]+]]:gpr32sp = COPY $w0 |
| ; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY $w1 |
| ; CHECK: [[COPY2:%[0-9]+]]:gpr32 = COPY $wzr |
| ; CHECK: $wzr = SUBSWri [[COPY]], 0, 0, implicit-def $nzcv |
| ; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[COPY2]], [[COPY1]], 0, implicit $nzcv |
| ; CHECK: $w0 = COPY [[CSELWr]] |
| ; CHECK: RET_ReallyLR implicit $w0 |
| %0:gpr(s32) = COPY $w0 |
| %1:gpr(s32) = COPY $w1 |
| %2:gpr(s32) = G_CONSTANT i32 0 |
| %5:gpr(s32) = G_ICMP intpred(eq), %0(s32), %2 |
| %3:gpr(s1) = G_TRUNC %5(s32) |
| %4:gpr(s32) = G_SELECT %3(s1), %2, %1 |
| $w0 = COPY %4(s32) |
| RET_ReallyLR implicit $w0 |
| |
| ... |
| --- |
| name: using_fcmp |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $s0, $w0, $w1 |
| |
| ; CHECK-LABEL: name: using_fcmp |
| ; CHECK: liveins: $s0, $w0, $w1 |
| ; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w1 |
| ; CHECK: [[COPY1:%[0-9]+]]:fpr32 = COPY $s0 |
| ; CHECK: [[COPY2:%[0-9]+]]:gpr32 = COPY $wzr |
| ; CHECK: FCMPSri [[COPY1]], implicit-def $nzcv |
| ; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[COPY2]], [[COPY]], 0, implicit $nzcv |
| ; CHECK: $w0 = COPY [[CSELWr]] |
| ; CHECK: RET_ReallyLR implicit $w0 |
| %1:gpr(s32) = COPY $w1 |
| %2:fpr(s32) = COPY $s0 |
| %3:fpr(s32) = G_FCONSTANT float 0.000000e+00 |
| %6:gpr(s32) = G_CONSTANT i32 0 |
| %7:gpr(s32) = G_FCMP floatpred(oeq), %2(s32), %3 |
| %4:gpr(s1) = G_TRUNC %7(s32) |
| %5:gpr(s32) = G_SELECT %4(s1), %6, %1 |
| $w0 = COPY %5(s32) |
| RET_ReallyLR implicit $w0 |
| |
| ... |
| --- |
| name: check_update_predicate |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $w0, $w1 |
| ; The G_ICMP is optimized here to be a slt comparison by adding 1 to the |
| ; constant. So, the CSELWr should use the predicate code 11, rather than |
| ; 13. |
| |
| ; CHECK-LABEL: name: check_update_predicate |
| ; CHECK: liveins: $w0, $w1 |
| ; CHECK: %copy1:gpr32sp = COPY $w0 |
| ; CHECK: %copy2:gpr32 = COPY $w1 |
| ; CHECK: %cst:gpr32 = MOVi32imm -1 |
| ; CHECK: $wzr = SUBSWri %copy1, 0, 0, implicit-def $nzcv |
| ; CHECK: %select:gpr32 = CSELWr %cst, %copy2, 11, implicit $nzcv |
| ; CHECK: $w0 = COPY %select |
| ; CHECK: RET_ReallyLR implicit $w0 |
| %copy1:gpr(s32) = COPY $w0 |
| %copy2:gpr(s32) = COPY $w1 |
| %cst:gpr(s32) = G_CONSTANT i32 -1 |
| %cmp:gpr(s32) = G_ICMP intpred(sle), %copy1(s32), %cst |
| %trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| %select:gpr(s32) = G_SELECT %trunc(s1), %cst, %copy2 |
| $w0 = COPY %select(s32) |
| RET_ReallyLR implicit $w0 |
| ... |