| # 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 |
| # |
| # Check that we can continue matching when we are in a situation where we will |
| # emit a TB(N)Z. |
| ... |
| --- |
| name: fold_zext |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| body: | |
| ; CHECK-LABEL: name: fold_zext |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: liveins: $x0 |
| ; CHECK: %copy:gpr32 = COPY $w0 |
| ; CHECK: TBNZW %copy, 3, %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 |
| %bit:gpr(s64) = G_CONSTANT i64 8 |
| %zero:gpr(s64) = G_CONSTANT i64 0 |
| %fold_me:gpr(s64) = G_ZEXT %copy(s32) |
| %and:gpr(s64) = G_AND %fold_me, %bit |
| %cmp:gpr(s32) = G_ICMP intpred(ne), %and(s64), %zero |
| %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| G_BRCOND %cmp_trunc(s1), %bb.1 |
| G_BR %bb.0 |
| bb.1: |
| RET_ReallyLR |
| ... |
| --- |
| name: fold_anyext |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| body: | |
| ; CHECK-LABEL: name: fold_anyext |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: liveins: $x0 |
| ; CHECK: %copy:gpr32 = COPY $w0 |
| ; CHECK: TBNZW %copy, 3, %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 |
| %bit:gpr(s64) = G_CONSTANT i64 8 |
| %zero:gpr(s64) = G_CONSTANT i64 0 |
| %fold_me:gpr(s64) = G_ANYEXT %copy(s32) |
| %and:gpr(s64) = G_AND %fold_me, %bit |
| %cmp:gpr(s32) = G_ICMP intpred(ne), %and(s64), %zero |
| %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| G_BRCOND %cmp_trunc(s1), %bb.1 |
| G_BR %bb.0 |
| bb.1: |
| RET_ReallyLR |
| ... |
| --- |
| name: fold_multiple |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| body: | |
| ; CHECK-LABEL: name: fold_multiple |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: liveins: $h0 |
| ; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:fpr32 = SUBREG_TO_REG 0, $h0, %subreg.hsub |
| ; CHECK: %copy:gpr32all = COPY [[SUBREG_TO_REG]] |
| ; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY %copy |
| ; CHECK: TBNZW [[COPY]], 3, %bb.1 |
| ; CHECK: B %bb.0 |
| ; CHECK: bb.1: |
| ; CHECK: RET_ReallyLR |
| bb.0: |
| successors: %bb.0, %bb.1 |
| liveins: $h0 |
| %copy:gpr(s16) = COPY $h0 |
| %bit:gpr(s64) = G_CONSTANT i64 8 |
| %zero:gpr(s64) = G_CONSTANT i64 0 |
| %ext1:gpr(s32) = G_ZEXT %copy(s16) |
| %ext2:gpr(s64) = G_ANYEXT %ext1(s32) |
| %and:gpr(s64) = G_AND %ext2, %bit |
| %cmp:gpr(s32) = G_ICMP intpred(ne), %and(s64), %zero |
| %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_more_than_one_use |
| alignment: 4 |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| body: | |
| ; CHECK-LABEL: name: dont_fold_more_than_one_use |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000) |
| ; CHECK: liveins: $x0 |
| ; CHECK: %copy:gpr32 = COPY $w0 |
| ; CHECK: [[ORRWrs:%[0-9]+]]:gpr32 = ORRWrs $wzr, %copy, 0 |
| ; CHECK: %zext:gpr64 = SUBREG_TO_REG 0, [[ORRWrs]], %subreg.sub_32 |
| ; CHECK: [[COPY:%[0-9]+]]:gpr32all = COPY %zext.sub_32 |
| ; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY [[COPY]] |
| ; CHECK: TBNZW [[COPY1]], 3, %bb.1 |
| ; CHECK: B %bb.0 |
| ; CHECK: bb.1: |
| ; CHECK: $x0 = COPY %zext |
| ; CHECK: RET_ReallyLR implicit $x0 |
| bb.0: |
| successors: %bb.0, %bb.1 |
| liveins: $x0 |
| %copy:gpr(s32) = COPY $w0 |
| %bit:gpr(s64) = G_CONSTANT i64 8 |
| %zero:gpr(s64) = G_CONSTANT i64 0 |
| %zext:gpr(s64) = G_ZEXT %copy(s32) |
| %and:gpr(s64) = G_AND %zext, %bit |
| %cmp:gpr(s32) = G_ICMP intpred(ne), %and(s64), %zero |
| %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32) |
| G_BRCOND %cmp_trunc(s1), %bb.1 |
| G_BR %bb.0 |
| bb.1: |
| $x0 = COPY %zext:gpr(s64) |
| RET_ReallyLR implicit $x0 |