| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -mtriple aarch64-unknown-unknown -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s |
| # |
| # Test that we can produce a tbz when we have a sgt compare against -1. |
| # |
| # The bit tested should be the size of the test register minus 1. |
| # |
| |
| ... |
| --- |
| name: tbzx_sgt |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| body: | |
| ; CHECK-LABEL: name: tbzx_sgt |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: %copy:gpr64 = COPY $x0 |
| ; CHECK: TBZX %copy, 63, %bb.1 |
| ; CHECK: B %bb.0 |
| ; CHECK: bb.1: |
| ; CHECK: RET_ReallyLR |
| bb.0: |
| successors: %bb.0, %bb.1 |
| liveins: $x0 |
| %copy:gpr(s64) = COPY $x0 |
| %negative_one:gpr(s64) = G_CONSTANT i64 -1 |
| %cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s64), %negative_one |
| %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| G_BRCOND %cmp_trunc(s1), %bb.1 |
| G_BR %bb.0 |
| bb.1: |
| RET_ReallyLR |
| |
| ... |
| --- |
| name: tbzw_sgt |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| body: | |
| ; CHECK-LABEL: name: tbzw_sgt |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: %copy:gpr32 = COPY $w0 |
| ; CHECK: TBZW %copy, 31, %bb.1 |
| ; CHECK: B %bb.0 |
| ; CHECK: bb.1: |
| ; CHECK: RET_ReallyLR |
| bb.0: |
| successors: %bb.0, %bb.1 |
| liveins: $x0 |
| %copy:gpr(s32) = COPY $w0 |
| %negative_one:gpr(s32) = G_CONSTANT i32 -1 |
| %cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s32), %negative_one |
| %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| G_BRCOND %cmp_trunc(s1), %bb.1 |
| G_BR %bb.0 |
| bb.1: |
| RET_ReallyLR |
| |
| ... |
| --- |
| name: no_tbz_not_negative_one |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| body: | |
| ; CHECK-LABEL: name: no_tbz_not_negative_one |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: %copy:gpr32sp = COPY $w0 |
| ; CHECK: [[SUBSWri:%[0-9]+]]:gpr32 = SUBSWri %copy, 1, 0, implicit-def $nzcv |
| ; CHECK: Bcc 12, %bb.1, implicit $nzcv |
| ; CHECK: B %bb.0 |
| ; CHECK: bb.1: |
| ; CHECK: RET_ReallyLR |
| bb.0: |
| successors: %bb.0, %bb.1 |
| liveins: $x0 |
| %copy:gpr(s32) = COPY $w0 |
| %one:gpr(s32) = G_CONSTANT i32 1 |
| %cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s32), %one |
| %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| G_BRCOND %cmp_trunc(s1), %bb.1 |
| G_BR %bb.0 |
| bb.1: |
| RET_ReallyLR |
| |
| ... |
| --- |
| name: dont_fold_and |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| body: | |
| ; CHECK-LABEL: name: dont_fold_and |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: %copy:gpr64 = COPY $x0 |
| ; CHECK: %and:gpr64sp = ANDXri %copy, 8000 |
| ; CHECK: [[ADDSXri:%[0-9]+]]:gpr64 = ADDSXri %and, 1, 0, implicit-def $nzcv |
| ; CHECK: Bcc 12, %bb.1, implicit $nzcv |
| ; CHECK: B %bb.0 |
| ; CHECK: bb.1: |
| ; CHECK: RET_ReallyLR |
| bb.0: |
| successors: %bb.0, %bb.1 |
| liveins: $x0 |
| %copy:gpr(s64) = COPY $x0 |
| %bit:gpr(s64) = G_CONSTANT i64 8 |
| %negative_one:gpr(s64) = G_CONSTANT i64 -1 |
| %c:gpr(s64) = G_CONSTANT i64 8 |
| %and:gpr(s64) = G_AND %copy, %bit |
| %cmp:gpr(s32) = G_ICMP intpred(sgt), %and(s64), %negative_one |
| %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| G_BRCOND %cmp_trunc(s1), %bb.1 |
| G_BR %bb.0 |
| bb.1: |
| RET_ReallyLR |
| |
| ... |
| --- |
| name: dont_commute |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| body: | |
| ; CHECK-LABEL: name: dont_commute |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: %copy:gpr64 = COPY $x0 |
| ; CHECK: %negative_one:gpr64 = MOVi64imm -1 |
| ; CHECK: [[SUBSXrr:%[0-9]+]]:gpr64 = SUBSXrr %negative_one, %copy, implicit-def $nzcv |
| ; CHECK: Bcc 12, %bb.1, implicit $nzcv |
| ; CHECK: B %bb.0 |
| ; CHECK: bb.1: |
| ; CHECK: RET_ReallyLR |
| bb.0: |
| successors: %bb.0, %bb.1 |
| liveins: $x0 |
| %copy:gpr(s64) = COPY $x0 |
| %negative_one:gpr(s64) = G_CONSTANT i64 -1 |
| %cmp:gpr(s32) = G_ICMP intpred(sgt), %negative_one, %copy(s64) |
| %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| G_BRCOND %cmp_trunc(s1), %bb.1 |
| G_BR %bb.0 |
| bb.1: |
| RET_ReallyLR |