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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=instcombine -S | FileCheck %s3 4; Check that assume is propagated backwards through all5; operations that are `isGuaranteedToTransferExecutionToSuccessor`6define i32 @assume_inevitable(ptr %a, ptr %b, ptr %c) {7; CHECK-LABEL: @assume_inevitable(8; CHECK-NEXT: entry:9; CHECK-NEXT: [[M:%.*]] = alloca i64, align 810; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[A:%.*]], align 411; CHECK-NEXT: [[LOADRES:%.*]] = load i32, ptr [[B:%.*]], align 412; CHECK-NEXT: [[LOADRES2:%.*]] = call i32 @llvm.annotation.i32.p0(i32 [[LOADRES]], ptr nonnull @.str, ptr nonnull @.str1, i32 2)13; CHECK-NEXT: store i32 [[LOADRES2]], ptr [[A]], align 414; CHECK-NEXT: [[DUMMY_EQ:%.*]] = icmp ugt i32 [[LOADRES]], 4215; CHECK-NEXT: tail call void @llvm.assume(i1 [[DUMMY_EQ]])16; CHECK-NEXT: [[M_A:%.*]] = call ptr @llvm.ptr.annotation.p0.p0(ptr nonnull [[M]], ptr nonnull @.str, ptr nonnull @.str1, i32 2, ptr null)17; CHECK-NEXT: [[OBJSZ:%.*]] = call i64 @llvm.objectsize.i64.p0(ptr [[C:%.*]], i1 false, i1 false, i1 false)18; CHECK-NEXT: store i64 [[OBJSZ]], ptr [[M_A]], align 419; CHECK-NEXT: [[PTRINT:%.*]] = ptrtoint ptr [[A]] to i6420; CHECK-NEXT: [[MASKEDPTR:%.*]] = and i64 [[PTRINT]], 3121; CHECK-NEXT: [[MASKCOND:%.*]] = icmp eq i64 [[MASKEDPTR]], 022; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND]])23; CHECK-NEXT: ret i32 [[TMP0]]24;25entry:26 %dummy = alloca i8, align 427 %m = alloca i6428 %0 = load i32, ptr %a, align 429 30 ; START perform a bunch of inevitable operations31 %loadres = load i32, ptr %b32 %loadres2 = call i32 @llvm.annotation.i32(i32 %loadres, ptr @.str, ptr @.str1, i32 2)33 store i32 %loadres2, ptr %a34 35 %dummy_eq = icmp ugt i32 %loadres, 4236 tail call void @llvm.assume(i1 %dummy_eq)37 38 call void @llvm.lifetime.start.p0(ptr %dummy)39 %i = call ptr @llvm.invariant.start.p0(i64 1, ptr %dummy)40 call void @llvm.invariant.end.p0(ptr %i, i64 1, ptr %dummy)41 call void @llvm.lifetime.end.p0(ptr %dummy)42 43 %m_a = call ptr @llvm.ptr.annotation.p0(ptr %m, ptr @.str, ptr @.str1, i32 2, ptr null)44 %objsz = call i64 @llvm.objectsize.i64.p0(ptr %c, i1 false)45 store i64 %objsz, ptr %m_a46 ; END perform a bunch of inevitable operations47 48 ; AND here's the assume:49 %ptrint = ptrtoint ptr %a to i6450 %maskedptr = and i64 %ptrint, 3151 %maskcond = icmp eq i64 %maskedptr, 052 tail call void @llvm.assume(i1 %maskcond)53 54 ret i32 %055}56 57@.str = private unnamed_addr constant [4 x i8] c"sth\00", section "llvm.metadata"58@.str1 = private unnamed_addr constant [4 x i8] c"t.c\00", section "llvm.metadata"59 60declare i64 @llvm.objectsize.i64.p0(ptr, i1)61declare i32 @llvm.annotation.i32(i32, ptr, ptr, i32)62declare ptr @llvm.ptr.annotation.p0(ptr, ptr, ptr, i32, ptr)63 64declare void @llvm.lifetime.start.p0(ptr nocapture)65declare void @llvm.lifetime.end.p0(ptr nocapture)66 67declare ptr @llvm.invariant.start.p0(i64, ptr nocapture)68declare void @llvm.invariant.end.p0(ptr, i64, ptr nocapture)69declare void @llvm.assume(i1)70