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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -O2 -S < %s | FileCheck %s3 4; Given an "expect" on a compare, we should not combine5; that compare with other instructions in a way that the6; backend can't undo. Expect lowering becomes metadata,7; and passes like SimplifyCFG should respect that.8 9define void @PR49336(i32 %delta, i32 %tag_type, ptr %ip) {10; CHECK-LABEL: @PR49336(11; CHECK-NEXT: entry:12; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[DELTA:%.*]], 013; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END3:%.*]], !prof !014; CHECK: if.then:15; CHECK-NEXT: [[CMP1_NOT:%.*]] = icmp eq i32 [[TAG_TYPE:%.*]], 016; CHECK-NEXT: br i1 [[CMP1_NOT]], label [[IF_END3]], label [[IF_THEN2:%.*]]17; CHECK: if.then2:18; CHECK-NEXT: store i8 42, ptr [[IP:%.*]], align 119; CHECK-NEXT: br label [[IF_END3]]20; CHECK: if.end3:21; CHECK-NEXT: ret void22;23entry:24 %delta.addr = alloca i32, align 425 %tag_type.addr = alloca i32, align 426 %ip.addr = alloca ptr, align 827 store i32 %delta, ptr %delta.addr, align 428 store i32 %tag_type, ptr %tag_type.addr, align 429 store ptr %ip, ptr %ip.addr, align 830 %0 = load i32, ptr %delta.addr, align 431 %cmp = icmp slt i32 %0, 032 %conv = zext i1 %cmp to i6433 %expval = call i64 @llvm.expect.i64(i64 %conv, i64 0)34 %tobool = icmp ne i64 %expval, 035 br i1 %tobool, label %if.then, label %if.end336 37if.then:38 %1 = load i32, ptr %tag_type.addr, align 439 %cmp1 = icmp ne i32 %1, 040 br i1 %cmp1, label %if.then2, label %if.end41 42if.then2:43 %2 = load ptr, ptr %ip.addr, align 844 store i8 42, ptr %2, align 145 br label %if.end46 47if.end:48 br label %if.end349 50if.end3:51 ret void52}53 54declare i64 @llvm.expect.i64(i64, i64)55