1 # RUN: llc -march=mipsel -mcpu=mips32r6 -start-after=block-placement %s -o - | FileCheck %s 2 3 # Check that empty blocks in the cfg don't cause the mips hazard scheduler to 4 # crash and that the nop is inserted correctly. 5 6 # CHECK: blezc 7 # CHECK: nop 8 # CHECK: # %bb.1: 9 # CHECK: .insn 10 # CHECK: # %bb.2: 11 # CHECK: .insn 12 # CHECK: # %bb.3: 13 # CHECK: jal 14 15 --- | 16 ; ModuleID = '<stdin>' 17 source_filename = "<stdin>" 18 target datalayout = "e-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64" 19 20 declare i32 @k() 21 22 declare void @f(i32) 23 24 define void @l5() { 25 entry: 26 %call = tail call i32 @k() 27 %cmp = icmp sgt i32 %call, 0 28 br i1 %cmp, label %if.then, label %if.end 29 30 if.then: ; preds = %entry 31 tail call void @f(i32 signext 2) 32 br label %if.end 33 34 if.end: ; preds = %if.then, %entry 35 ret void 36 } 37 38 --- 39 name: l5 40 alignment: 2 41 exposesReturnsTwice: false 42 legalized: false 43 regBankSelected: false 44 selected: false 45 tracksRegLiveness: true 46 frameInfo: 47 isFrameAddressTaken: false 48 isReturnAddressTaken: false 49 hasStackMap: false 50 hasPatchPoint: false 51 stackSize: 24 52 offsetAdjustment: 0 53 maxAlignment: 4 54 adjustsStack: true 55 hasCalls: true 56 maxCallFrameSize: 16 57 hasOpaqueSPAdjustment: false 58 hasVAStart: false 59 hasMustTailInVarArgFunc: false 60 stack: 61 - { id: 0, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '$ra' } 62 body: | 63 bb.0.entry: 64 successors: %bb.1.if.then(0x50000000), %bb.4.if.end(0x30000000) 65 liveins: $ra 66 67 $sp = ADDiu $sp, -24 68 CFI_INSTRUCTION def_cfa_offset 24 69 SW killed $ra, $sp, 20 :: (store 4 into %stack.0) 70 CFI_INSTRUCTION offset $ra_64, -4 71 JAL @k, csr_o32_fp64, implicit-def dead $ra, implicit-def $sp, implicit-def $v0 72 BLEZ $v0, %bb.4.if.end, implicit-def $at 73 74 bb.1.if.then: 75 successors: %bb.2.if.then(0x80000000) 76 77 bb.2.if.then: 78 successors: %bb.3.if.then(0x80000000) 79 80 bb.3.if.then: 81 successors: %bb.4.if.end(0x80000000) 82 83 $a0 = ADDiu $zero, 2 84 JAL @f, csr_o32_fp64, implicit-def dead $ra, implicit killed $a0, implicit-def $sp 85 86 bb.4.if.end: 87 $ra = LW $sp, 20 :: (load 4 from %stack.0) 88 $sp = ADDiu $sp, 24 89 PseudoReturn undef $ra 90 91 ... 92
