; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "loop:" --version 6 ; RUN: opt -p loop-vectorize -force-vector-width=4 -force-vector-interleave=3 -S %s | FileCheck --check-prefix=IC3 %s ; RUN: opt -p loop-vectorize -force-vector-width=4 -force-vector-interleave=4 -S %s | FileCheck --check-prefix=IC4 %s ; RUN: opt -p loop-vectorize -force-vector-width=4 -force-vector-interleave=5 -S %s | FileCheck --check-prefix=IC5 %s define float @fmaxnum(ptr %src, i64 %n) { ; IC3-LABEL: define float @fmaxnum( ; IC3-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) { ; IC3-NEXT: [[ENTRY:.*]]: ; IC3-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 12 ; IC3-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]] ; IC3: [[VECTOR_PH]]: ; IC3-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], 12 ; IC3-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]] ; IC3-NEXT: br label %[[VECTOR_BODY:.*]] ; IC3: [[VECTOR_BODY]]: ; IC3-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ] ; IC3-NEXT: [[VEC_PHI:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP3:%.*]], %[[VECTOR_BODY]] ] ; IC3-NEXT: [[VEC_PHI1:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP4:%.*]], %[[VECTOR_BODY]] ] ; IC3-NEXT: [[VEC_PHI2:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP5:%.*]], %[[VECTOR_BODY]] ] ; IC3-NEXT: [[TMP0:%.*]] = getelementptr inbounds nuw float, ptr [[SRC]], i64 [[INDEX]] ; IC3-NEXT: [[TMP1:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 4 ; IC3-NEXT: [[TMP2:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 8 ; IC3-NEXT: [[WIDE_LOAD:%.*]] = load <4 x float>, ptr [[TMP0]], align 4 ; IC3-NEXT: [[WIDE_LOAD3:%.*]] = load <4 x float>, ptr [[TMP1]], align 4 ; IC3-NEXT: [[WIDE_LOAD4:%.*]] = load <4 x float>, ptr [[TMP2]], align 4 ; IC3-NEXT: [[TMP3]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI]], <4 x float> [[WIDE_LOAD]]) ; IC3-NEXT: [[TMP4]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI1]], <4 x float> [[WIDE_LOAD3]]) ; IC3-NEXT: [[TMP5]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI2]], <4 x float> [[WIDE_LOAD4]]) ; IC3-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 12 ; IC3-NEXT: [[TMP8:%.*]] = fcmp uno <4 x float> [[WIDE_LOAD4]], [[WIDE_LOAD4]] ; IC3-NEXT: [[TMP7:%.*]] = fcmp uno <4 x float> [[WIDE_LOAD]], [[WIDE_LOAD3]] ; IC3-NEXT: [[TMP10:%.*]] = freeze <4 x i1> [[TMP7]] ; IC3-NEXT: [[TMP12:%.*]] = freeze <4 x i1> [[TMP8]] ; IC3-NEXT: [[TMP13:%.*]] = or <4 x i1> [[TMP10]], [[TMP12]] ; IC3-NEXT: [[TMP14:%.*]] = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> [[TMP13]]) ; IC3-NEXT: [[TMP15:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]] ; IC3-NEXT: [[TMP16:%.*]] = or i1 [[TMP14]], [[TMP15]] ; IC3-NEXT: br i1 [[TMP16]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] ; IC3: [[MIDDLE_BLOCK]]: ; IC3-NEXT: [[TMP17:%.*]] = select i1 [[TMP14]], <4 x float> [[VEC_PHI]], <4 x float> [[TMP3]] ; IC3-NEXT: [[TMP18:%.*]] = select i1 [[TMP14]], <4 x float> [[VEC_PHI1]], <4 x float> [[TMP4]] ; IC3-NEXT: [[TMP19:%.*]] = select i1 [[TMP14]], <4 x float> [[VEC_PHI2]], <4 x float> [[TMP5]] ; IC3-NEXT: [[TMP20:%.*]] = select i1 [[TMP14]], i64 [[INDEX]], i64 [[N_VEC]] ; IC3-NEXT: [[RDX_MINMAX:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[TMP17]], <4 x float> [[TMP18]]) ; IC3-NEXT: [[RDX_MINMAX5:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[RDX_MINMAX]], <4 x float> [[TMP19]]) ; IC3-NEXT: [[TMP21:%.*]] = call float @llvm.vector.reduce.fmax.v4f32(<4 x float> [[RDX_MINMAX5]]) ; IC3-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]] ; IC3-NEXT: [[TMP22:%.*]] = xor i1 [[TMP14]], true ; IC3-NEXT: [[TMP23:%.*]] = and i1 [[CMP_N]], [[TMP22]] ; IC3-NEXT: br i1 [[TMP23]], [[EXIT:label %.*]], label %[[SCALAR_PH]] ; IC3: [[SCALAR_PH]]: ; IC3-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[TMP20]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ] ; IC3-NEXT: [[BC_MERGE_RDX:%.*]] = phi float [ [[TMP21]], %[[MIDDLE_BLOCK]] ], [ -1.000000e+07, %[[ENTRY]] ] ; IC3-NEXT: br label %[[LOOP:.*]] ; IC3: [[LOOP]]: ; ; IC4-LABEL: define float @fmaxnum( ; IC4-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) { ; IC4-NEXT: [[ENTRY:.*]]: ; IC4-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 16 ; IC4-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]] ; IC4: [[VECTOR_PH]]: ; IC4-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], 16 ; IC4-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]] ; IC4-NEXT: br label %[[VECTOR_BODY:.*]] ; IC4: [[VECTOR_BODY]]: ; IC4-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ] ; IC4-NEXT: [[VEC_PHI:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP4:%.*]], %[[VECTOR_BODY]] ] ; IC4-NEXT: [[VEC_PHI1:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP5:%.*]], %[[VECTOR_BODY]] ] ; IC4-NEXT: [[VEC_PHI2:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP6:%.*]], %[[VECTOR_BODY]] ] ; IC4-NEXT: [[VEC_PHI3:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP7:%.*]], %[[VECTOR_BODY]] ] ; IC4-NEXT: [[TMP0:%.*]] = getelementptr inbounds nuw float, ptr [[SRC]], i64 [[INDEX]] ; IC4-NEXT: [[TMP1:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 4 ; IC4-NEXT: [[TMP2:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 8 ; IC4-NEXT: [[TMP3:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 12 ; IC4-NEXT: [[WIDE_LOAD:%.*]] = load <4 x float>, ptr [[TMP0]], align 4 ; IC4-NEXT: [[WIDE_LOAD4:%.*]] = load <4 x float>, ptr [[TMP1]], align 4 ; IC4-NEXT: [[WIDE_LOAD5:%.*]] = load <4 x float>, ptr [[TMP2]], align 4 ; IC4-NEXT: [[WIDE_LOAD6:%.*]] = load <4 x float>, ptr [[TMP3]], align 4 ; IC4-NEXT: [[TMP4]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI]], <4 x float> [[WIDE_LOAD]]) ; IC4-NEXT: [[TMP5]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI1]], <4 x float> [[WIDE_LOAD4]]) ; IC4-NEXT: [[TMP6]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI2]], <4 x float> [[WIDE_LOAD5]]) ; IC4-NEXT: [[TMP7]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI3]], <4 x float> [[WIDE_LOAD6]]) ; IC4-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 16 ; IC4-NEXT: [[TMP24:%.*]] = fcmp uno <4 x float> [[WIDE_LOAD]], [[WIDE_LOAD4]] ; IC4-NEXT: [[TMP25:%.*]] = fcmp uno <4 x float> [[WIDE_LOAD5]], [[WIDE_LOAD6]] ; IC4-NEXT: [[TMP26:%.*]] = freeze <4 x i1> [[TMP24]] ; IC4-NEXT: [[TMP28:%.*]] = freeze <4 x i1> [[TMP25]] ; IC4-NEXT: [[TMP29:%.*]] = or <4 x i1> [[TMP26]], [[TMP28]] ; IC4-NEXT: [[TMP13:%.*]] = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> [[TMP29]]) ; IC4-NEXT: [[TMP14:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]] ; IC4-NEXT: [[TMP15:%.*]] = or i1 [[TMP13]], [[TMP14]] ; IC4-NEXT: br i1 [[TMP15]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] ; IC4: [[MIDDLE_BLOCK]]: ; IC4-NEXT: [[TMP16:%.*]] = select i1 [[TMP13]], <4 x float> [[VEC_PHI]], <4 x float> [[TMP4]] ; IC4-NEXT: [[TMP17:%.*]] = select i1 [[TMP13]], <4 x float> [[VEC_PHI1]], <4 x float> [[TMP5]] ; IC4-NEXT: [[TMP18:%.*]] = select i1 [[TMP13]], <4 x float> [[VEC_PHI2]], <4 x float> [[TMP6]] ; IC4-NEXT: [[TMP19:%.*]] = select i1 [[TMP13]], <4 x float> [[VEC_PHI3]], <4 x float> [[TMP7]] ; IC4-NEXT: [[TMP20:%.*]] = select i1 [[TMP13]], i64 [[INDEX]], i64 [[N_VEC]] ; IC4-NEXT: [[RDX_MINMAX:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[TMP16]], <4 x float> [[TMP17]]) ; IC4-NEXT: [[RDX_MINMAX7:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[RDX_MINMAX]], <4 x float> [[TMP18]]) ; IC4-NEXT: [[RDX_MINMAX8:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[RDX_MINMAX7]], <4 x float> [[TMP19]]) ; IC4-NEXT: [[TMP21:%.*]] = call float @llvm.vector.reduce.fmax.v4f32(<4 x float> [[RDX_MINMAX8]]) ; IC4-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]] ; IC4-NEXT: [[TMP22:%.*]] = xor i1 [[TMP13]], true ; IC4-NEXT: [[TMP23:%.*]] = and i1 [[CMP_N]], [[TMP22]] ; IC4-NEXT: br i1 [[TMP23]], [[EXIT:label %.*]], label %[[SCALAR_PH]] ; IC4: [[SCALAR_PH]]: ; IC4-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[TMP20]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ] ; IC4-NEXT: [[BC_MERGE_RDX:%.*]] = phi float [ [[TMP21]], %[[MIDDLE_BLOCK]] ], [ -1.000000e+07, %[[ENTRY]] ] ; IC4-NEXT: br label %[[LOOP:.*]] ; IC4: [[LOOP]]: ; ; IC5-LABEL: define float @fmaxnum( ; IC5-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) { ; IC5-NEXT: [[ENTRY:.*]]: ; IC5-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 20 ; IC5-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]] ; IC5: [[VECTOR_PH]]: ; IC5-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], 20 ; IC5-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]] ; IC5-NEXT: br label %[[VECTOR_BODY:.*]] ; IC5: [[VECTOR_BODY]]: ; IC5-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ] ; IC5-NEXT: [[VEC_PHI:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP5:%.*]], %[[VECTOR_BODY]] ] ; IC5-NEXT: [[VEC_PHI1:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP6:%.*]], %[[VECTOR_BODY]] ] ; IC5-NEXT: [[VEC_PHI2:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP7:%.*]], %[[VECTOR_BODY]] ] ; IC5-NEXT: [[VEC_PHI3:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP8:%.*]], %[[VECTOR_BODY]] ] ; IC5-NEXT: [[VEC_PHI4:%.*]] = phi <4 x float> [ splat (float -1.000000e+07), %[[VECTOR_PH]] ], [ [[TMP9:%.*]], %[[VECTOR_BODY]] ] ; IC5-NEXT: [[TMP0:%.*]] = getelementptr inbounds nuw float, ptr [[SRC]], i64 [[INDEX]] ; IC5-NEXT: [[TMP1:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 4 ; IC5-NEXT: [[TMP2:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 8 ; IC5-NEXT: [[TMP3:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 12 ; IC5-NEXT: [[TMP4:%.*]] = getelementptr inbounds nuw float, ptr [[TMP0]], i64 16 ; IC5-NEXT: [[WIDE_LOAD:%.*]] = load <4 x float>, ptr [[TMP0]], align 4 ; IC5-NEXT: [[WIDE_LOAD5:%.*]] = load <4 x float>, ptr [[TMP1]], align 4 ; IC5-NEXT: [[WIDE_LOAD6:%.*]] = load <4 x float>, ptr [[TMP2]], align 4 ; IC5-NEXT: [[WIDE_LOAD7:%.*]] = load <4 x float>, ptr [[TMP3]], align 4 ; IC5-NEXT: [[WIDE_LOAD8:%.*]] = load <4 x float>, ptr [[TMP4]], align 4 ; IC5-NEXT: [[TMP5]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI]], <4 x float> [[WIDE_LOAD]]) ; IC5-NEXT: [[TMP6]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI1]], <4 x float> [[WIDE_LOAD5]]) ; IC5-NEXT: [[TMP7]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI2]], <4 x float> [[WIDE_LOAD6]]) ; IC5-NEXT: [[TMP8]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI3]], <4 x float> [[WIDE_LOAD7]]) ; IC5-NEXT: [[TMP9]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[VEC_PHI4]], <4 x float> [[WIDE_LOAD8]]) ; IC5-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 20 ; IC5-NEXT: [[TMP14:%.*]] = fcmp uno <4 x float> [[WIDE_LOAD8]], [[WIDE_LOAD8]] ; IC5-NEXT: [[TMP12:%.*]] = fcmp uno <4 x float> [[WIDE_LOAD]], [[WIDE_LOAD5]] ; IC5-NEXT: [[TMP13:%.*]] = fcmp uno <4 x float> [[WIDE_LOAD6]], [[WIDE_LOAD7]] ; IC5-NEXT: [[TMP18:%.*]] = freeze <4 x i1> [[TMP12]] ; IC5-NEXT: [[TMP20:%.*]] = freeze <4 x i1> [[TMP13]] ; IC5-NEXT: [[TMP21:%.*]] = or <4 x i1> [[TMP18]], [[TMP20]] ; IC5-NEXT: [[TMP22:%.*]] = freeze <4 x i1> [[TMP14]] ; IC5-NEXT: [[TMP23:%.*]] = or <4 x i1> [[TMP21]], [[TMP22]] ; IC5-NEXT: [[TMP24:%.*]] = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> [[TMP23]]) ; IC5-NEXT: [[TMP25:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]] ; IC5-NEXT: [[TMP26:%.*]] = or i1 [[TMP24]], [[TMP25]] ; IC5-NEXT: br i1 [[TMP26]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] ; IC5: [[MIDDLE_BLOCK]]: ; IC5-NEXT: [[TMP27:%.*]] = select i1 [[TMP24]], <4 x float> [[VEC_PHI]], <4 x float> [[TMP5]] ; IC5-NEXT: [[TMP28:%.*]] = select i1 [[TMP24]], <4 x float> [[VEC_PHI1]], <4 x float> [[TMP6]] ; IC5-NEXT: [[TMP29:%.*]] = select i1 [[TMP24]], <4 x float> [[VEC_PHI2]], <4 x float> [[TMP7]] ; IC5-NEXT: [[TMP30:%.*]] = select i1 [[TMP24]], <4 x float> [[VEC_PHI3]], <4 x float> [[TMP8]] ; IC5-NEXT: [[TMP31:%.*]] = select i1 [[TMP24]], <4 x float> [[VEC_PHI4]], <4 x float> [[TMP9]] ; IC5-NEXT: [[TMP32:%.*]] = select i1 [[TMP24]], i64 [[INDEX]], i64 [[N_VEC]] ; IC5-NEXT: [[RDX_MINMAX:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[TMP27]], <4 x float> [[TMP28]]) ; IC5-NEXT: [[RDX_MINMAX9:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[RDX_MINMAX]], <4 x float> [[TMP29]]) ; IC5-NEXT: [[RDX_MINMAX10:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[RDX_MINMAX9]], <4 x float> [[TMP30]]) ; IC5-NEXT: [[RDX_MINMAX11:%.*]] = call <4 x float> @llvm.maxnum.v4f32(<4 x float> [[RDX_MINMAX10]], <4 x float> [[TMP31]]) ; IC5-NEXT: [[TMP33:%.*]] = call float @llvm.vector.reduce.fmax.v4f32(<4 x float> [[RDX_MINMAX11]]) ; IC5-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]] ; IC5-NEXT: [[TMP34:%.*]] = xor i1 [[TMP24]], true ; IC5-NEXT: [[TMP35:%.*]] = and i1 [[CMP_N]], [[TMP34]] ; IC5-NEXT: br i1 [[TMP35]], [[EXIT:label %.*]], label %[[SCALAR_PH]] ; IC5: [[SCALAR_PH]]: ; IC5-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[TMP32]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ] ; IC5-NEXT: [[BC_MERGE_RDX:%.*]] = phi float [ [[TMP33]], %[[MIDDLE_BLOCK]] ], [ -1.000000e+07, %[[ENTRY]] ] ; IC5-NEXT: br label %[[LOOP:.*]] ; IC5: [[LOOP]]: ; entry: br label %loop loop: %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ] %max = phi float [ -1.000000e+07, %entry ], [ %max.next, %loop ] %gep.src = getelementptr inbounds nuw float, ptr %src, i64 %iv %l = load float, ptr %gep.src, align 4 %max.next = call float @llvm.maxnum.f32(float %max, float %l) %iv.next = add nuw nsw i64 %iv, 1 %ec = icmp eq i64 %iv.next, %n br i1 %ec, label %exit, label %loop exit: ret float %max.next }