1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -O2 -S < %s | FileCheck %s 3 4; Given an "expect" on a compare, we should not combine 5; that compare with other instructions in a way that the 6; 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:%.*]], 0 13; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END3:%.*]], !prof !0 14; CHECK: if.then: 15; CHECK-NEXT: [[CMP1_NOT:%.*]] = icmp eq i32 [[TAG_TYPE:%.*]], 0 16; 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 1 19; CHECK-NEXT: br label [[IF_END3]] 20; CHECK: if.end3: 21; CHECK-NEXT: ret void 22; 23entry: 24 %delta.addr = alloca i32, align 4 25 %tag_type.addr = alloca i32, align 4 26 %ip.addr = alloca ptr, align 8 27 store i32 %delta, ptr %delta.addr, align 4 28 store i32 %tag_type, ptr %tag_type.addr, align 4 29 store ptr %ip, ptr %ip.addr, align 8 30 %0 = load i32, ptr %delta.addr, align 4 31 %cmp = icmp slt i32 %0, 0 32 %conv = zext i1 %cmp to i64 33 %expval = call i64 @llvm.expect.i64(i64 %conv, i64 0) 34 %tobool = icmp ne i64 %expval, 0 35 br i1 %tobool, label %if.then, label %if.end3 36 37if.then: 38 %1 = load i32, ptr %tag_type.addr, align 4 39 %cmp1 = icmp ne i32 %1, 0 40 br i1 %cmp1, label %if.then2, label %if.end 41 42if.then2: 43 %2 = load ptr, ptr %ip.addr, align 8 44 store i8 42, ptr %2, align 1 45 br label %if.end 46 47if.end: 48 br label %if.end3 49 50if.end3: 51 ret void 52} 53 54declare i64 @llvm.expect.i64(i64, i64) 55