1 ; RUN: llc < %s -mtriple=x86_64-linux -mattr=+sse2 -mcpu=nehalem | FileCheck %s --check-prefix=SSE
2 ; RUN: llc < %s -mtriple=x86_64-win32 -mattr=+sse2 -mcpu=nehalem | FileCheck %s --check-prefix=SSE
3 ; RUN: llc < %s -mtriple=x86_64-win32 -mattr=+avx -mcpu=corei7-avx | FileCheck %s --check-prefix=AVX
5 define double @t1(float* nocapture %x) nounwind readonly ssp {
8 ; SSE: movss ([[A0:%rdi|%rcx]]), %xmm0
9 ; SSE: cvtss2sd %xmm0, %xmm0
11 %0 = load float, float* %x, align 4
12 %1 = fpext float %0 to double
16 define float @t2(double* nocapture %x) nounwind readonly ssp optsize {
19 ; SSE: cvtsd2ss ([[A0]]), %xmm0
20 %0 = load double, double* %x, align 8
21 %1 = fptrunc double %0 to float
25 define float @squirtf(float* %x) nounwind {
28 ; SSE: movss ([[A0]]), %xmm0
29 ; SSE: sqrtss %xmm0, %xmm0
30 %z = load float, float* %x
31 %t = call float @llvm.sqrt.f32(float %z)
35 define double @squirt(double* %x) nounwind {
38 ; SSE: movsd ([[A0]]), %xmm0
39 ; SSE: sqrtsd %xmm0, %xmm0
40 %z = load double, double* %x
41 %t = call double @llvm.sqrt.f64(double %z)
45 define float @squirtf_size(float* %x) nounwind optsize {
47 ; SSE-LABEL: squirtf_size:
48 ; SSE: sqrtss ([[A0]]), %xmm0
49 %z = load float, float* %x
50 %t = call float @llvm.sqrt.f32(float %z)
54 define double @squirt_size(double* %x) nounwind optsize {
56 ; SSE-LABEL: squirt_size:
57 ; SSE: sqrtsd ([[A0]]), %xmm0
58 %z = load double, double* %x
59 %t = call double @llvm.sqrt.f64(double %z)
63 declare float @llvm.sqrt.f32(float)
64 declare double @llvm.sqrt.f64(double)
69 ; This loop contains two cvtsi2ss instructions that update the same xmm
70 ; register. Verify that the execution dependency fix pass breaks those
71 ; dependencies by inserting xorps instructions.
73 ; If the register allocator chooses different registers for the two cvtsi2ss
74 ; instructions, they are still dependent on themselves.
75 ; SSE: xorps [[XMM1:%xmm[0-9]+]]
77 ; SSE: cvtsi2ssl %{{.*}}, [[XMM1]]
78 ; SSE: xorps [[XMM2:%xmm[0-9]+]]
80 ; SSE: cvtsi2ssl %{{.*}}, [[XMM2]]
82 define float @loopdep1(i32 %m) nounwind uwtable readnone ssp {
84 %tobool3 = icmp eq i32 %m, 0
85 br i1 %tobool3, label %for.end, label %for.body
87 for.body: ; preds = %entry, %for.body
88 %m.addr.07 = phi i32 [ %dec, %for.body ], [ %m, %entry ]
89 %s1.06 = phi float [ %add, %for.body ], [ 0.000000e+00, %entry ]
90 %s2.05 = phi float [ %add2, %for.body ], [ 0.000000e+00, %entry ]
91 %n.04 = phi i32 [ %inc, %for.body ], [ 1, %entry ]
92 %conv = sitofp i32 %n.04 to float
93 %add = fadd float %s1.06, %conv
94 %conv1 = sitofp i32 %m.addr.07 to float
95 %add2 = fadd float %s2.05, %conv1
96 %inc = add nsw i32 %n.04, 1
97 %dec = add nsw i32 %m.addr.07, -1
98 %tobool = icmp eq i32 %dec, 0
99 br i1 %tobool, label %for.end, label %for.body
101 for.end: ; preds = %for.body, %entry
102 %s1.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add, %for.body ]
103 %s2.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add2, %for.body ]
104 %sub = fsub float %s1.0.lcssa, %s2.0.lcssa
108 ; rdar:15221834 False AVX register dependencies cause 5x slowdown on
109 ; flops-6. Make sure the unused register read by vcvtsi2sdq is zeroed
110 ; to avoid cyclic dependence on a write to the same register in a
111 ; previous iteration.
113 ; AVX-LABEL: loopdep2:
115 ; AVX: vxorps %[[REG:xmm.]], %{{xmm.}}, %{{xmm.}}
116 ; AVX: vcvtsi2sdq %{{r[0-9a-x]+}}, %[[REG]], %{{xmm.}}
117 ; SSE-LABEL: loopdep2:
119 ; SSE: xorps %[[REG:xmm.]], %[[REG]]
120 ; SSE: cvtsi2sdq %{{r[0-9a-x]+}}, %[[REG]]
121 define i64 @loopdep2(i64* nocapture %x, double* nocapture %y) nounwind {
123 %vx = load i64, i64* %x
126 %i = phi i64 [ 1, %entry ], [ %inc, %loop ]
127 %s1 = phi i64 [ %vx, %entry ], [ %s2, %loop ]
128 %fi = sitofp i64 %i to double
129 %vy = load double, double* %y
130 %fipy = fadd double %fi, %vy
131 %iipy = fptosi double %fipy to i64
132 %s2 = add i64 %s1, %iipy
133 %inc = add nsw i64 %i, 1
134 %exitcond = icmp eq i64 %inc, 156250000
135 br i1 %exitcond, label %ret, label %loop
140 ; This loop contains a cvtsi2sd instruction that has a loop-carried
141 ; false dependency on an xmm that is modified by other scalar instructions
142 ; that follow it in the loop. Additionally, the source of convert is a
143 ; memory operand. Verify the execution dependency fix pass breaks this
144 ; dependency by inserting a xor before the convert.
145 @x = common global [1024 x double] zeroinitializer, align 16
146 @y = common global [1024 x double] zeroinitializer, align 16
147 @z = common global [1024 x double] zeroinitializer, align 16
148 @w = common global [1024 x double] zeroinitializer, align 16
149 @v = common global [1024 x i32] zeroinitializer, align 16
151 define void @loopdep3() {
153 br label %for.cond1.preheader
155 for.cond1.preheader: ; preds = %for.inc14, %entry
156 %i.025 = phi i32 [ 0, %entry ], [ %inc15, %for.inc14 ]
160 %indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body3 ]
161 %arrayidx = getelementptr inbounds [1024 x i32], [1024 x i32]* @v, i64 0, i64 %indvars.iv
162 %0 = load i32, i32* %arrayidx, align 4
163 %conv = sitofp i32 %0 to double
164 %arrayidx5 = getelementptr inbounds [1024 x double], [1024 x double]* @x, i64 0, i64 %indvars.iv
165 %1 = load double, double* %arrayidx5, align 8
166 %mul = fmul double %conv, %1
167 %arrayidx7 = getelementptr inbounds [1024 x double], [1024 x double]* @y, i64 0, i64 %indvars.iv
168 %2 = load double, double* %arrayidx7, align 8
169 %mul8 = fmul double %mul, %2
170 %arrayidx10 = getelementptr inbounds [1024 x double], [1024 x double]* @z, i64 0, i64 %indvars.iv
171 %3 = load double, double* %arrayidx10, align 8
172 %mul11 = fmul double %mul8, %3
173 %arrayidx13 = getelementptr inbounds [1024 x double], [1024 x double]* @w, i64 0, i64 %indvars.iv
174 store double %mul11, double* %arrayidx13, align 8
175 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
176 %exitcond = icmp eq i64 %indvars.iv.next, 1024
177 br i1 %exitcond, label %for.inc14, label %for.body3
179 for.inc14: ; preds = %for.body3
180 %inc15 = add nsw i32 %i.025, 1
181 %exitcond26 = icmp eq i32 %inc15, 100000
182 br i1 %exitcond26, label %for.end16, label %for.cond1.preheader
184 for.end16: ; preds = %for.inc14
188 ;SSE: xorps [[XMM0:%xmm[0-9]+]], [[XMM0]]
189 ;SSE-NEXT: cvtsi2sdl {{.*}}, [[XMM0]]
190 ;SSE-NEXT: mulsd {{.*}}, [[XMM0]]
191 ;SSE-NEXT: mulsd {{.*}}, [[XMM0]]
192 ;SSE-NEXT: mulsd {{.*}}, [[XMM0]]
193 ;SSE-NEXT: movsd [[XMM0]],
195 ;AVX: vxorps [[XMM0:%xmm[0-9]+]], [[XMM0]]
196 ;AVX-NEXT: vcvtsi2sdl {{.*}}, [[XMM0]], [[XMM0]]
197 ;AVX-NEXT: vmulsd {{.*}}, [[XMM0]], [[XMM0]]
198 ;AVX-NEXT: vmulsd {{.*}}, [[XMM0]], [[XMM0]]
199 ;AVX-NEXT: vmulsd {{.*}}, [[XMM0]], [[XMM0]]
200 ;AVX-NEXT: vmovsd [[XMM0]],