1 ; RUN: opt -domtree -instcombine -loops -S < %s | FileCheck %s 2 ; Note: The -loops above can be anything that requires the domtree, and is 3 ; necessary to work around a pass-manager bug. 4 5 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 6 target triple = "x86_64-unknown-linux-gnu" 7 8 %struct.s = type { double* } 9 10 ; Function Attrs: nounwind uwtable 11 define void @_Z3fooR1s(%struct.s* nocapture readonly dereferenceable(8) %x) #0 { 12 13 ; CHECK-LABEL: @_Z3fooR1s 14 ; CHECK: call void @llvm.assume 15 ; CHECK-NOT: call void @llvm.assume 16 17 entry: 18 %a = getelementptr inbounds %struct.s, %struct.s* %x, i64 0, i32 0 19 %0 = load double*, double** %a, align 8 20 %ptrint = ptrtoint double* %0 to i64 21 %maskedptr = and i64 %ptrint, 31 22 %maskcond = icmp eq i64 %maskedptr, 0 23 br label %for.body 24 25 for.body: ; preds = %for.body, %entry 26 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.1, %for.body ] 27 tail call void @llvm.assume(i1 %maskcond) 28 %arrayidx = getelementptr inbounds double, double* %0, i64 %indvars.iv 29 %1 = load double, double* %arrayidx, align 16 30 %add = fadd double %1, 1.000000e+00 31 tail call void @llvm.assume(i1 %maskcond) 32 %mul = fmul double %add, 2.000000e+00 33 store double %mul, double* %arrayidx, align 16 34 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 35 tail call void @llvm.assume(i1 %maskcond) 36 %arrayidx.1 = getelementptr inbounds double, double* %0, i64 %indvars.iv.next 37 %2 = load double, double* %arrayidx.1, align 8 38 %add.1 = fadd double %2, 1.000000e+00 39 tail call void @llvm.assume(i1 %maskcond) 40 %mul.1 = fmul double %add.1, 2.000000e+00 41 store double %mul.1, double* %arrayidx.1, align 8 42 %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1 43 %exitcond.1 = icmp eq i64 %indvars.iv.next, 1599 44 br i1 %exitcond.1, label %for.end, label %for.body 45 46 for.end: ; preds = %for.body 47 ret void 48 } 49 50 declare align 8 i8* @get() 51 52 ; Check that redundant align assume is removed 53 ; CHECK-LABEL: @test 54 ; CHECK-NOT: call void @llvm.assume 55 define void @test1() { 56 %p = call align 8 i8* @get() 57 %ptrint = ptrtoint i8* %p to i64 58 %maskedptr = and i64 %ptrint, 7 59 %maskcond = icmp eq i64 %maskedptr, 0 60 call void @llvm.assume(i1 %maskcond) 61 ret void 62 } 63 64 ; Check that redundant align assume is removed 65 ; CHECK-LABEL: @test 66 ; CHECK-NOT: call void @llvm.assume 67 define void @test3() { 68 %p = alloca i8, align 8 69 %ptrint = ptrtoint i8* %p to i64 70 %maskedptr = and i64 %ptrint, 7 71 %maskcond = icmp eq i64 %maskedptr, 0 72 call void @llvm.assume(i1 %maskcond) 73 ret void 74 } 75 76 ; Function Attrs: nounwind 77 declare void @llvm.assume(i1) #1 78 79 attributes #0 = { nounwind uwtable } 80 attributes #1 = { nounwind } 81 82
