1 ; RUN: llc < %s -mattr=-avx -fast-isel -O0 -regalloc=fast -asm-verbose=0 -fast-isel-abort | FileCheck %s 2 ; RUN: llc < %s -mattr=+avx -fast-isel -O0 -regalloc=fast -asm-verbose=0 -fast-isel-abort | FileCheck %s --check-prefix=AVX 3 4 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" 5 target triple = "x86_64-apple-darwin10.0.0" 6 7 ; Make sure that fast-isel folds the immediate into the binop even though it 8 ; is non-canonical. 9 define i32 @test1(i32 %i) nounwind ssp { 10 %and = and i32 8, %i 11 ret i32 %and 12 } 13 14 ; CHECK: test1: 15 ; CHECK: andl $8, 16 17 18 ; rdar://9289512 - The load should fold into the compare. 19 define void @test2(i64 %x) nounwind ssp { 20 entry: 21 %x.addr = alloca i64, align 8 22 store i64 %x, i64* %x.addr, align 8 23 %tmp = load i64* %x.addr, align 8 24 %cmp = icmp sgt i64 %tmp, 42 25 br i1 %cmp, label %if.then, label %if.end 26 27 if.then: ; preds = %entry 28 br label %if.end 29 30 if.end: ; preds = %if.then, %entry 31 ret void 32 ; CHECK: test2: 33 ; CHECK: movq %rdi, -8(%rsp) 34 ; CHECK: cmpq $42, -8(%rsp) 35 } 36 37 38 39 40 @G = external global i32 41 define i64 @test3() nounwind { 42 %A = ptrtoint i32* @G to i64 43 ret i64 %A 44 ; CHECK: test3: 45 ; CHECK: movq _G@GOTPCREL(%rip), %rax 46 ; CHECK-NEXT: ret 47 } 48 49 50 51 ; rdar://9289558 52 @rtx_length = external global [153 x i8] 53 54 define i32 @test4(i64 %idxprom9) nounwind { 55 %arrayidx10 = getelementptr inbounds [153 x i8]* @rtx_length, i32 0, i64 %idxprom9 56 %tmp11 = load i8* %arrayidx10, align 1 57 %conv = zext i8 %tmp11 to i32 58 ret i32 %conv 59 60 ; CHECK: test4: 61 ; CHECK: movq _rtx_length@GOTPCREL(%rip), %rax 62 ; CHECK-NEXT: movzbl (%rax,%rdi), %eax 63 ; CHECK-NEXT: ret 64 } 65 66 67 ; PR3242 - Out of range shifts should not be folded by fastisel. 68 define void @test5(i32 %x, i32* %p) nounwind { 69 %y = ashr i32 %x, 50000 70 store i32 %y, i32* %p 71 ret void 72 73 ; CHECK: test5: 74 ; CHECK: movl $50000, %ecx 75 ; CHECK: sarl %cl, %edi 76 ; CHECK: ret 77 } 78 79 ; rdar://9289501 - fast isel should fold trivial multiplies to shifts. 80 define i64 @test6(i64 %x) nounwind ssp { 81 entry: 82 %mul = mul nsw i64 %x, 8 83 ret i64 %mul 84 85 ; CHECK: test6: 86 ; CHECK: shlq $3, %rdi 87 } 88 89 define i32 @test7(i32 %x) nounwind ssp { 90 entry: 91 %mul = mul nsw i32 %x, 8 92 ret i32 %mul 93 ; CHECK: test7: 94 ; CHECK: shll $3, %edi 95 } 96 97 98 ; rdar://9289507 - folding of immediates into 64-bit operations. 99 define i64 @test8(i64 %x) nounwind ssp { 100 entry: 101 %add = add nsw i64 %x, 7 102 ret i64 %add 103 104 ; CHECK: test8: 105 ; CHECK: addq $7, %rdi 106 } 107 108 define i64 @test9(i64 %x) nounwind ssp { 109 entry: 110 %add = mul nsw i64 %x, 7 111 ret i64 %add 112 ; CHECK: test9: 113 ; CHECK: imulq $7, %rdi, %rax 114 } 115 116 ; rdar://9297011 - Don't reject udiv by a power of 2. 117 define i32 @test10(i32 %X) nounwind { 118 %Y = udiv i32 %X, 8 119 ret i32 %Y 120 ; CHECK: test10: 121 ; CHECK: shrl $3, 122 } 123 124 define i32 @test11(i32 %X) nounwind { 125 %Y = sdiv exact i32 %X, 8 126 ret i32 %Y 127 ; CHECK: test11: 128 ; CHECK: sarl $3, 129 } 130 131 132 ; rdar://9297006 - Trunc to bool. 133 define void @test12(i8 %tmp) nounwind ssp noredzone { 134 entry: 135 %tobool = trunc i8 %tmp to i1 136 br i1 %tobool, label %if.then, label %if.end 137 138 if.then: ; preds = %entry 139 call void @test12(i8 0) noredzone 140 br label %if.end 141 142 if.end: ; preds = %if.then, %entry 143 ret void 144 ; CHECK: test12: 145 ; CHECK: testb $1, 146 ; CHECK-NEXT: je L 147 ; CHECK-NEXT: movl $0, %edi 148 ; CHECK-NEXT: callq 149 } 150 151 declare void @test13f(i1 %X) 152 153 define void @test13() nounwind { 154 call void @test13f(i1 0) 155 ret void 156 ; CHECK: test13: 157 ; CHECK: movl $0, %edi 158 ; CHECK-NEXT: callq 159 } 160 161 162 163 ; rdar://9297003 - fast isel bails out on all functions taking bools 164 define void @test14(i8 %tmp) nounwind ssp noredzone { 165 entry: 166 %tobool = trunc i8 %tmp to i1 167 call void @test13f(i1 zeroext %tobool) noredzone 168 ret void 169 ; CHECK: test14: 170 ; CHECK: andb $1, 171 ; CHECK: callq 172 } 173 174 declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i32, i1) 175 176 ; rdar://9289488 - fast-isel shouldn't bail out on llvm.memcpy 177 define void @test15(i8* %a, i8* %b) nounwind { 178 call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* %b, i64 4, i32 4, i1 false) 179 ret void 180 ; CHECK: test15: 181 ; CHECK-NEXT: movl (%rsi), %eax 182 ; CHECK-NEXT: movl %eax, (%rdi) 183 ; CHECK-NEXT: ret 184 } 185 186 ; Handling for varargs calls 187 declare void @test16callee(...) nounwind 188 define void @test16() nounwind { 189 ; CHECK: test16: 190 ; CHECK: movl $1, %edi 191 ; CHECK: movb $0, %al 192 ; CHECK: callq _test16callee 193 call void (...)* @test16callee(i32 1) 194 br label %block2 195 196 block2: 197 ; CHECK: movabsq $1 198 ; CHECK: cvtsi2sdq {{.*}} %xmm0 199 ; CHECK: movb $1, %al 200 ; CHECK: callq _test16callee 201 202 ; AVX: movabsq $1 203 ; AVX: vmovsd LCP{{.*}}_{{.*}}(%rip), %xmm0 204 ; AVX: movb $1, %al 205 ; AVX: callq _test16callee 206 call void (...)* @test16callee(double 1.000000e+00) 207 ret void 208 } 209 210 211 declare void @foo() unnamed_addr ssp align 2 212 213 ; Verify that we don't fold the load into the compare here. That would move it 214 ; w.r.t. the call. 215 define i32 @test17(i32 *%P) ssp nounwind { 216 entry: 217 %tmp = load i32* %P 218 %cmp = icmp ne i32 %tmp, 5 219 call void @foo() 220 br i1 %cmp, label %if.then, label %if.else 221 222 if.then: ; preds = %entry 223 ret i32 1 224 225 if.else: ; preds = %entry 226 ret i32 2 227 ; CHECK: test17: 228 ; CHECK: movl (%rdi), %eax 229 ; CHECK: callq _foo 230 ; CHECK: cmpl $5, %eax 231 ; CHECK-NEXT: je 232 } 233 234 ; Check that 0.0 is materialized using xorps 235 define void @test18(float* %p1) { 236 store float 0.0, float* %p1 237 ret void 238 ; CHECK: test18: 239 ; CHECK: xorps 240 } 241 242 ; Without any type hints, doubles use the smaller xorps instead of xorpd. 243 define void @test19(double* %p1) { 244 store double 0.0, double* %p1 245 ret void 246 ; CHECK: test19: 247 ; CHECK: xorps 248 } 249 250 ; Check that we fast-isel sret 251 %struct.a = type { i64, i64, i64 } 252 define void @test20() nounwind ssp { 253 entry: 254 %tmp = alloca %struct.a, align 8 255 call void @test20sret(%struct.a* sret %tmp) 256 ret void 257 ; CHECK: test20: 258 ; CHECK: leaq (%rsp), %rdi 259 ; CHECK: callq _test20sret 260 } 261 declare void @test20sret(%struct.a* sret) 262 263 ; Check that -0.0 is not materialized using xor 264 define void @test21(double* %p1) { 265 store double -0.0, double* %p1 266 ret void 267 ; CHECK: test21: 268 ; CHECK-NOT: xor 269 ; CHECK: movsd LCPI 270 } 271 272 ; Check that immediate arguments to a function 273 ; do not cause massive spilling and are used 274 ; as immediates just before the call. 275 define void @test22() nounwind { 276 entry: 277 call void @foo22(i32 0) 278 call void @foo22(i32 1) 279 call void @foo22(i32 2) 280 call void @foo22(i32 3) 281 ret void 282 ; CHECK: test22: 283 ; CHECK: movl $0, %edi 284 ; CHECK: callq _foo22 285 ; CHECK: movl $1, %edi 286 ; CHECK: callq _foo22 287 ; CHECK: movl $2, %edi 288 ; CHECK: callq _foo22 289 ; CHECK: movl $3, %edi 290 ; CHECK: callq _foo22 291 } 292 293 declare void @foo22(i32) 294
