1 ; RUN: llc < %s -verify-machineinstrs -asm-verbose=false -mtriple=x86_64-unknown-linux-gnu -mcpu=nehalem -post-RA-scheduler=true -schedmodel=false | FileCheck %s
3 ; Currently, floating-point selects are lowered to CFG triangles.
4 ; This means that one side of the select is always unconditionally
5 ; evaluated, however with MachineSink we can sink the other side so
6 ; that it's conditionally evaluated.
9 ; CHECK-NEXT: testb $1, %dil
16 define double @foo(double %x, double %y, i1 %c) nounwind {
17 %a = fdiv double %x, 3.2
18 %b = fdiv double %y, 3.3
19 %z = select i1 %c, double %a, double %b
23 ; Make sure the critical edge is broken so the divsd is sunken below
24 ; the conditional branch.
28 ; CHECK-NEXT: testb $1, %dil
33 define double @split(double %x, double %y, i1 %c) nounwind {
34 %a = fdiv double %x, 3.2
35 %z = select i1 %c, double %a, double %y
40 ; Hoist floating-point constant-pool loads out of loops.
45 define void @bar(ptr nocapture %p, i64 %n) nounwind {
47 %0 = icmp sgt i64 %n, 0
48 br i1 %0, label %bb, label %return
51 %i.03 = phi i64 [ 0, %entry ], [ %3, %bb ]
52 %scevgep = getelementptr double, ptr %p, i64 %i.03
53 %1 = load double, ptr %scevgep, align 8
54 %2 = fdiv double 3.200000e+00, %1
55 store double %2, ptr %scevgep, align 8
56 %3 = add nsw i64 %i.03, 1
57 %exitcond = icmp eq i64 %3, %n
58 br i1 %exitcond, label %return, label %bb
64 ; Sink instructions with dead EFLAGS defs.
66 ; FIXME: Unfail the zzz test if we can correctly mark pregs with the kill flag.
68 ; See <rdar://problem/8030636>. This test isn't valid after we made machine
69 ; sinking more conservative about sinking instructions that define a preg into a
70 ; block when we don't know if the preg is killed within the current block.
77 ; define zeroext i8 @zzz(i8 zeroext %a, i8 zeroext %b) nounwind readnone {
79 ; %tmp = zext i8 %a to i32 ; <i32> [#uses=1]
80 ; %tmp2 = icmp eq i8 %a, 0 ; <i1> [#uses=1]
81 ; %tmp3 = or i8 %b, -128 ; <i8> [#uses=1]
82 ; %tmp4 = and i8 %b, 127 ; <i8> [#uses=1]
83 ; %b_addr.0 = select i1 %tmp2, i8 %tmp4, i8 %tmp3 ; <i8> [#uses=1]
87 ; Codegen should hoist and CSE these constants.
90 ; CHECK: LCPI3_0(%rip), %xmm0
91 ; CHECK: LCPI3_1(%rip), %xmm1
92 ; CHECK: LCPI3_2(%rip), %xmm2
97 @_minusZero.6007 = internal constant <4 x float> <float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00> ; <ptr> [#uses=0]
98 @twoTo23.6008 = internal constant <4 x float> <float 8.388608e+06, float 8.388608e+06, float 8.388608e+06, float 8.388608e+06> ; <ptr> [#uses=0]
100 define void @vv(ptr %y, ptr %x, ptr %n) nounwind ssp {
105 %i.0 = phi i32 [ 0, %bb60 ] ; <i32> [#uses=2]
106 %0 = load <4 x float>, ptr %x_addr.0, align 16 ; <<4 x float>> [#uses=4]
107 %tmp20 = bitcast <4 x float> %0 to <4 x i32> ; <<4 x i32>> [#uses=1]
108 %tmp22 = and <4 x i32> %tmp20, <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647> ; <<4 x i32>> [#uses=1]
109 %tmp23 = bitcast <4 x i32> %tmp22 to <4 x float> ; <<4 x float>> [#uses=1]
110 %tmp25 = bitcast <4 x float> %0 to <4 x i32> ; <<4 x i32>> [#uses=1]
111 %tmp27 = and <4 x i32> %tmp25, <i32 -2147483648, i32 -2147483648, i32 -2147483648, i32 -2147483648> ; <<4 x i32>> [#uses=2]
112 %tmp30 = call <4 x float> @llvm.x86.sse.cmp.ps(<4 x float> %tmp23, <4 x float> <float 8.388608e+06, float 8.388608e+06, float 8.388608e+06, float 8.388608e+06>, i8 5) ; <<4 x float>> [#uses=1]
113 %tmp34 = bitcast <4 x float> %tmp30 to <4 x i32> ; <<4 x i32>> [#uses=1]
114 %tmp36 = xor <4 x i32> %tmp34, <i32 -1, i32 -1, i32 -1, i32 -1> ; <<4 x i32>> [#uses=1]
115 %tmp37 = and <4 x i32> %tmp36, <i32 1258291200, i32 1258291200, i32 1258291200, i32 1258291200> ; <<4 x i32>> [#uses=1]
116 %tmp42 = or <4 x i32> %tmp37, %tmp27 ; <<4 x i32>> [#uses=1]
117 %tmp43 = bitcast <4 x i32> %tmp42 to <4 x float> ; <<4 x float>> [#uses=2]
118 %tmp45 = fadd <4 x float> %0, %tmp43 ; <<4 x float>> [#uses=1]
119 %tmp47 = fsub <4 x float> %tmp45, %tmp43 ; <<4 x float>> [#uses=2]
120 %tmp49 = call <4 x float> @llvm.x86.sse.cmp.ps(<4 x float> %0, <4 x float> %tmp47, i8 1) ; <<4 x float>> [#uses=1]
121 %1 = bitcast <4 x float> %tmp49 to <4 x i32> ; <<4 x i32>> [#uses=1]
122 %2 = call <4 x float> @llvm.x86.sse2.cvtdq2ps(<4 x i32> %1) nounwind readnone ; <<4 x float>> [#uses=1]
123 %tmp53 = fadd <4 x float> %tmp47, %2 ; <<4 x float>> [#uses=1]
124 %tmp55 = bitcast <4 x float> %tmp53 to <4 x i32> ; <<4 x i32>> [#uses=1]
125 %tmp57 = or <4 x i32> %tmp55, %tmp27 ; <<4 x i32>> [#uses=1]
126 %tmp58 = bitcast <4 x i32> %tmp57 to <4 x float> ; <<4 x float>> [#uses=1]
127 store <4 x float> %tmp58, ptr %y_addr.0, align 16
128 %3 = getelementptr float, ptr %x_addr.0, i64 4 ; <ptr> [#uses=1]
129 %4 = getelementptr float, ptr %y_addr.0, i64 4 ; <ptr> [#uses=1]
130 %5 = add i32 %i.0, 4 ; <i32> [#uses=1]
131 %6 = load i32, ptr %n, align 4 ; <i32> [#uses=1]
132 %7 = icmp sgt i32 %6, %5 ; <i1> [#uses=1]
133 br i1 %7, label %bb60, label %return
135 bb60: ; preds = %bb, %entry
136 %x_addr.0 = phi ptr [ %x, %entry ], [ %3, %bb ] ; <ptr> [#uses=2]
137 %y_addr.0 = phi ptr [ %y, %entry ], [ %4, %bb ] ; <ptr> [#uses=2]
140 return: ; preds = %bb60
144 declare <4 x float> @llvm.x86.sse.cmp.ps(<4 x float>, <4 x float>, i8) nounwind readnone
146 declare <4 x float> @llvm.x86.sse2.cvtdq2ps(<4 x i32>) nounwind readnone
148 ; CodeGen should use the correct register class when extracting
149 ; a load from a zero-extending load for hoisting.
151 ; CHECK-LABEL: default_get_pch_validity:
152 ; CHECK: movl cl_options_count(%rip), %ecx
154 @cl_options_count = external dso_local constant i32 ; <ptr> [#uses=2]
156 define void @default_get_pch_validity() nounwind {
158 %tmp4 = load i32, ptr @cl_options_count, align 4 ; <i32> [#uses=1]
159 %tmp5 = icmp eq i32 %tmp4, 0 ; <i1> [#uses=1]
160 br i1 %tmp5, label %bb6, label %bb2
162 bb2: ; preds = %bb2, %entry
163 %i.019 = phi i64 [ 0, %entry ], [ %tmp25, %bb2 ] ; <i64> [#uses=1]
164 %tmp25 = add i64 %i.019, 1 ; <i64> [#uses=2]
165 %tmp11 = load i32, ptr @cl_options_count, align 4 ; <i32> [#uses=1]
166 %tmp12 = zext i32 %tmp11 to i64 ; <i64> [#uses=1]
167 %tmp13 = icmp ugt i64 %tmp12, %tmp25 ; <i1> [#uses=1]
168 br i1 %tmp13, label %bb2, label %bb6
170 bb6: ; preds = %bb2, %entry