1 ; RUN: llc -mtriple=thumbv7-apple-none-macho < %s | FileCheck %s 2 ; RUN: llc -mtriple=thumbv6m-apple-none-macho -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-T1 3 ; RUN: llc -mtriple=thumbv7-apple-darwin-ios -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-IOS 4 ; RUN: llc -mtriple=thumbv7--linux-gnueabi -disable-fp-elim < %s | FileCheck %s --check-prefix=CHECK-LINUX 5 6 7 declare void @bar(i8*) 8 9 %bigVec = type [2 x double] 10 11 @var = global %bigVec zeroinitializer 12 13 define void @check_simple() minsize { 14 ; CHECK-LABEL: check_simple: 15 ; CHECK: push.w {r7, r8, r9, r10, r11, lr} 16 ; CHECK-NOT: sub sp, sp, 17 ; ... 18 ; CHECK-NOT: add sp, sp, 19 ; CHECK: pop.w {r0, r1, r2, r3, r11, pc} 20 21 ; CHECK-T1-LABEL: check_simple: 22 ; CHECK-T1: push {r3, r4, r5, r6, r7, lr} 23 ; CHECK-T1: add r7, sp, #16 24 ; CHECK-T1-NOT: sub sp, sp, 25 ; ... 26 ; CHECK-T1-NOT: add sp, sp, 27 ; CHECK-T1: pop {r0, r1, r2, r3, r7, pc} 28 29 ; iOS always has a frame pointer and messing with the push affects 30 ; how it's set in the prologue. Make sure we get that right. 31 ; CHECK-IOS-LABEL: check_simple: 32 ; CHECK-IOS: push {r3, r4, r5, r6, r7, lr} 33 ; CHECK-NOT: sub sp, 34 ; CHECK-IOS: add r7, sp, #16 35 ; CHECK-NOT: sub sp, 36 ; ... 37 ; CHECK-NOT: add sp, 38 ; CHEC: pop {r3, r4, r5, r6, r7, pc} 39 40 %var = alloca i8, i32 16 41 call void @bar(i8* %var) 42 ret void 43 } 44 45 define void @check_simple_too_big() minsize { 46 ; CHECK-LABEL: check_simple_too_big: 47 ; CHECK: push.w {r11, lr} 48 ; CHECK: sub sp, 49 ; ... 50 ; CHECK: add sp, 51 ; CHECK: pop.w {r11, pc} 52 %var = alloca i8, i32 64 53 call void @bar(i8* %var) 54 ret void 55 } 56 57 define void @check_vfp_fold() minsize { 58 ; CHECK-LABEL: check_vfp_fold: 59 ; CHECK: push {r[[GLOBREG:[0-9]+]], lr} 60 ; CHECK: vpush {d6, d7, d8, d9} 61 ; CHECK-NOT: sub sp, 62 ; ... 63 ; CHECK: vldmia r[[GLOBREG]], {d8, d9} 64 ; ... 65 ; CHECK-NOT: add sp, 66 ; CHECK: vpop {d6, d7, d8, d9} 67 ; CHECKL pop {r[[GLOBREG]], pc} 68 69 ; iOS uses aligned NEON stores here, which is convenient since we 70 ; want to make sure that works too. 71 ; CHECK-IOS-LABEL: check_vfp_fold: 72 ; CHECK-IOS: push {r0, r1, r2, r3, r4, r7, lr} 73 ; CHECK-IOS: sub.w r4, sp, #16 74 ; CHECK-IOS: bic r4, r4, #15 75 ; CHECK-IOS: mov sp, r4 76 ; CHECK-IOS: vst1.64 {d8, d9}, [r4:128] 77 ; ... 78 ; CHECK-IOS: add r4, sp, #16 79 ; CHECK-IOS: vld1.64 {d8, d9}, [r4:128] 80 ; CHECK-IOS: mov sp, r4 81 ; CHECK-IOS: pop {r4, r7, pc} 82 83 %var = alloca i8, i32 16 84 85 %tmp = load %bigVec* @var 86 call void @bar(i8* %var) 87 store %bigVec %tmp, %bigVec* @var 88 89 ret void 90 } 91 92 ; This function should use just enough space that the "add sp, sp, ..." could be 93 ; folded in except that doing so would clobber the value being returned. 94 define i64 @check_no_return_clobber() minsize { 95 ; CHECK-LABEL: check_no_return_clobber: 96 ; CHECK: push.w {r5, r6, r7, r8, r9, r10, r11, lr} 97 ; CHECK-NOT: sub sp, 98 ; ... 99 ; CHECK: add sp, #24 100 ; CHECK: pop.w {r11, pc} 101 102 ; Just to keep iOS FileCheck within previous function: 103 ; CHECK-IOS-LABEL: check_no_return_clobber: 104 105 %var = alloca i8, i32 20 106 call void @bar(i8* %var) 107 ret i64 0 108 } 109 110 define arm_aapcs_vfpcc double @check_vfp_no_return_clobber() minsize { 111 ; CHECK-LABEL: check_vfp_no_return_clobber: 112 ; CHECK: push {r[[GLOBREG:[0-9]+]], lr} 113 ; CHECK: vpush {d0, d1, d2, d3, d4, d5, d6, d7, d8, d9} 114 ; CHECK-NOT: sub sp, 115 ; ... 116 ; CHECK: add sp, #64 117 ; CHECK: vpop {d8, d9} 118 ; CHECK: pop {r[[GLOBREG]], pc} 119 120 %var = alloca i8, i32 64 121 122 %tmp = load %bigVec* @var 123 call void @bar(i8* %var) 124 store %bigVec %tmp, %bigVec* @var 125 126 ret double 1.0 127 } 128 129 @dbl = global double 0.0 130 131 ; PR18136: there was a bug determining where the first eligible pop in a 132 ; basic-block was when the entire block was epilogue code. 133 define void @test_fold_point(i1 %tst) minsize { 134 ; CHECK-LABEL: test_fold_point: 135 136 ; Important to check for beginning of basic block, because if it gets 137 ; if-converted the test is probably no longer checking what it should. 138 ; CHECK: {{LBB[0-9]+_2}}: 139 ; CHECK-NEXT: vpop {d7, d8} 140 ; CHECK-NEXT: pop {r4, pc} 141 142 ; With a guaranteed frame-pointer, we want to make sure that its offset in the 143 ; push block is correct, even if a few registers have been tacked onto a later 144 ; vpush (PR18160). 145 ; CHECK-IOS-LABEL: test_fold_point: 146 ; CHECK-IOS: push {r4, r7, lr} 147 ; CHECK-IOS-NEXT: add r7, sp, #4 148 ; CHECK-IOS-NEXT: vpush {d7, d8} 149 150 ; We want some memory so there's a stack adjustment to fold... 151 %var = alloca i8, i32 8 152 153 ; We want a long-lived floating register so that a callee-saved dN is used and 154 ; there's both a vpop and a pop. 155 %live_val = load double* @dbl 156 br i1 %tst, label %true, label %end 157 true: 158 call void @bar(i8* %var) 159 store double %live_val, double* @dbl 160 br label %end 161 end: 162 ; We want the epilogue to be the only thing in a basic block so that we hit 163 ; the correct edge-case (first inst in block is correct one to adjust). 164 ret void 165 } 166 167 define void @test_varsize(...) minsize { 168 ; CHECK-T1-LABEL: test_varsize: 169 ; CHECK-T1: sub sp, #16 170 ; CHECK-T1: push {r2, r3, r4, r5, r7, lr} 171 ; ... 172 ; CHECK-T1: pop {r2, r3, r4, r5, r7} 173 ; CHECK-T1: pop {r3} 174 ; CHECK-T1: add sp, #16 175 ; CHECK-T1: bx r3 176 177 ; CHECK-LABEL: test_varsize: 178 ; CHECK: sub sp, #16 179 ; CHECK: push.w {r9, r10, r11, lr} 180 ; ... 181 ; CHECK: pop.w {r2, r3, r11, lr} 182 ; CHECK: add sp, #16 183 ; CHECK: bx lr 184 185 %var = alloca i8, i32 8 186 call void @bar(i8* %var) 187 ret void 188 } 189 190 %"MyClass" = type { i8*, i32, i32, float, float, float, [2 x i8], i32, i32* } 191 192 declare float @foo() 193 194 declare void @bar3() 195 196 declare %"MyClass"* @bar2(%"MyClass"* returned, i16*, i32, float, float, i32, i32, i1 zeroext, i1 zeroext, i32) 197 198 define fastcc float @check_vfp_no_return_clobber2(i16* %r, i16* %chars, i32 %length, i1 zeroext %flag) minsize { 199 entry: 200 ; CHECK-LINUX-LABEL: check_vfp_no_return_clobber2 201 ; CHECK-LINUX: vpush {d0, d1, d2, d3, d4, d5, d6, d7, d8} 202 ; CHECK-NOT: sub sp, 203 ; ... 204 ; CHECK-LINUX: add sp 205 ; CHECK-LINUX: vpop {d8} 206 %run = alloca %"MyClass", align 4 207 %call = call %"MyClass"* @bar2(%"MyClass"* %run, i16* %chars, i32 %length, float 0.000000e+00, float 0.000000e+00, i32 1, i32 1, i1 zeroext false, i1 zeroext true, i32 3) 208 %call1 = call float @foo() 209 %cmp = icmp eq %"MyClass"* %run, null 210 br i1 %cmp, label %exit, label %if.then 211 212 if.then: ; preds = %entry 213 call void @bar3() 214 br label %exit 215 216 exit: ; preds = %if.then, %entry 217 ret float %call1 218 } 219
