| # RUN: llc -mtriple thumbv6m-arm-none-eabi -run-pass=machine-cse -verify-machineinstrs -o - %s | FileCheck %s |
| |
| --- | |
| target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" |
| target triple = "thumbv6m-arm-none-eabi" |
| |
| define i32 @funca(i64 %l1) { |
| entry: |
| %l2 = icmp ult i64 %l1, -177673816660004267 |
| %l3 = add i64 %l1, 401100203 |
| %rem.i = select i1 %l2, i64 %l1, i64 %l3 |
| %conv = trunc i64 %rem.i to i32 |
| ret i32 %conv |
| } |
| |
| define i32 @funcb(i64 %l1) { ret i32 0 } |
| |
| ... |
| --- |
| name: funca |
| tracksRegLiveness: true |
| liveins: |
| - { reg: '$r0', virtual-reg: '%0' } |
| - { reg: '$r1', virtual-reg: '%1' } |
| constants: |
| - id: 0 |
| value: i32 401100203 |
| alignment: 4 |
| isTargetSpecific: false |
| - id: 1 |
| value: i32 41367909 |
| alignment: 4 |
| isTargetSpecific: false |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x40000000), %bb.2(0x40000000) |
| liveins: $r0, $r1 |
| |
| %1:tgpr = COPY $r1 |
| %0:tgpr = COPY $r0 |
| %2:tgpr = tLDRpci %const.0, 14, $noreg :: (load (s32) from constant-pool) |
| %3:tgpr, dead $cpsr = tADDrr %0, %2, 14, $noreg |
| %4:tgpr = tLDRpci %const.1, 14, $noreg :: (load (s32) from constant-pool) |
| %5:tgpr, $cpsr = tADDrr %0, %2, 14, $noreg |
| %6:tgpr, $cpsr = tADC %1, killed %4, 14, $noreg, implicit $cpsr |
| tBcc %bb.2, 3, $cpsr |
| |
| bb.1.entry: |
| successors: %bb.2(0x80000000) |
| |
| bb.2.entry: |
| %7:tgpr = PHI %3, %bb.1, %0, %bb.0 |
| $r0 = COPY %7 |
| tBX_RET 14, $noreg, implicit $r0 |
| |
| # CHECK-LABEL: name: funca |
| # cpsr def must not be dead |
| # CHECK: %3:tgpr, $cpsr = tADDrr %0, %2 |
| # CHECK-NOT: %5:tgpr, $cpsr = tADDrr %0, %2 |
| |
| ... |
| --- |
| name: funcb |
| tracksRegLiveness: true |
| liveins: |
| - { reg: '$r0', virtual-reg: '%0' } |
| - { reg: '$r1', virtual-reg: '%1' } |
| constants: |
| - id: 0 |
| value: i32 401100203 |
| alignment: 4 |
| isTargetSpecific: false |
| - id: 1 |
| value: i32 41367909 |
| alignment: 4 |
| isTargetSpecific: false |
| body: | |
| bb.0: |
| successors: %bb.1(0x40000000), %bb.2(0x40000000) |
| liveins: $r0, $r1 |
| |
| %1:tgpr = COPY $r1 |
| %0:tgpr = COPY $r0 |
| %2:tgpr = tLDRpci %const.0, 14, $noreg :: (load (s32) from constant-pool) |
| %3:tgpr, dead $cpsr = tADDrr %0, %2, 14, $noreg |
| %4:tgpr = tLDRpci %const.1, 14, $noreg :: (load (s32) from constant-pool) |
| %5:tgpr, dead $cpsr = tADDrr %0, %2, 14, $noreg |
| %6:tgpr, $cpsr = tADDrr %1, killed %4, 14, $noreg |
| tBcc %bb.2, 3, $cpsr |
| |
| bb.1: |
| successors: %bb.2(0x80000000) |
| |
| bb.2: |
| %7:tgpr = PHI %3, %bb.1, %0, %bb.0 |
| $r0 = COPY %7 |
| tBX_RET 14, $noreg, implicit $r0 |
| |
| # CHECK-LABEL: name: funcb |
| # cpsr def should be dead |
| # CHECK: %3:tgpr, dead $cpsr = tADDrr %0, %2 |
| # CHECK-NOT: %5:tgpr, dead $cpsr = tADDrr %0, %2 |
| ... |