1; RUN: opt -passes='require<domtree>,instcombine<no-verify-fixpoint>,require<domtree>' -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; In _Z3fooR1s we can only infer nuw on the gep after the IV has been 6; simplified, which we can't do in one iteration. (Note that nowadays 7; LoopUnroll would pre-simplify the IV and avoid the issue.) 8 9target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 10target triple = "x86_64-unknown-linux-gnu" 11 12%struct.s = type { ptr } 13 14; Function Attrs: nounwind uwtable 15define void @_Z3fooR1s(ptr nocapture readonly dereferenceable(8) %x) #0 { 16 17; CHECK-LABEL: @_Z3fooR1s 18; CHECK: call void @llvm.assume 19; CHECK-NOT: call void @llvm.assume 20 21entry: 22 %0 = load ptr, ptr %x, align 8 23 %ptrint = ptrtoint ptr %0 to i64 24 %maskedptr = and i64 %ptrint, 31 25 %maskcond = icmp eq i64 %maskedptr, 0 26 br label %for.body 27 28for.body: ; preds = %for.body, %entry 29 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.1, %for.body ] 30 tail call void @llvm.assume(i1 %maskcond) 31 %arrayidx = getelementptr inbounds double, ptr %0, i64 %indvars.iv 32 %1 = load double, ptr %arrayidx, align 16 33 %add = fadd double %1, 1.000000e+00 34 tail call void @llvm.assume(i1 %maskcond) 35 %mul = fmul double %add, 2.000000e+00 36 store double %mul, ptr %arrayidx, align 16 37 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 38 tail call void @llvm.assume(i1 %maskcond) 39 %arrayidx.1 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.next 40 %2 = load double, ptr %arrayidx.1, align 8 41 %add.1 = fadd double %2, 1.000000e+00 42 tail call void @llvm.assume(i1 %maskcond) 43 %mul.1 = fmul double %add.1, 2.000000e+00 44 store double %mul.1, ptr %arrayidx.1, align 8 45 %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1 46 %exitcond.1 = icmp eq i64 %indvars.iv.next, 1599 47 br i1 %exitcond.1, label %for.end, label %for.body 48 49for.end: ; preds = %for.body 50 ret void 51} 52 53declare align 8 ptr @get() 54 55; Check that redundant align assume is removed 56; CHECK-LABEL: @test 57; CHECK-NOT: call void @llvm.assume 58define void @test1() { 59 %p = call align 8 ptr @get() 60 %ptrint = ptrtoint ptr %p to i64 61 %maskedptr = and i64 %ptrint, 7 62 %maskcond = icmp eq i64 %maskedptr, 0 63 call void @llvm.assume(i1 %maskcond) 64 ret void 65} 66 67; Check that redundant align assume is removed 68; CHECK-LABEL: @test 69; CHECK-NOT: call void @llvm.assume 70define void @test3() { 71 %p = alloca i8, align 8 72 %ptrint = ptrtoint ptr %p to i64 73 %maskedptr = and i64 %ptrint, 7 74 %maskcond = icmp eq i64 %maskedptr, 0 75 call void @llvm.assume(i1 %maskcond) 76 ret void 77} 78 79; Function Attrs: nounwind 80declare void @llvm.assume(i1) #1 81 82attributes #0 = { nounwind uwtable } 83attributes #1 = { nounwind } 84 85