1 ; Test the static branch probability heuristics for error-reporting functions. 2 ; RUN: opt < %s -instcombine -S | FileCheck %s 3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 4 target triple = "x86_64-unknown-linux-gnu" 5 6 %struct._IO_FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct._IO_FILE*, i32, i32, i64, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i8*, i8*, i64, i32, [20 x i8] } 7 %struct._IO_marker = type { %struct._IO_marker*, %struct._IO_FILE*, i32 } 8 9 @stdout = external global %struct._IO_FILE* 10 @stderr = external global %struct._IO_FILE* 11 @.str = private unnamed_addr constant [13 x i8] c"an error: %d\00", align 1 12 @.str1 = private unnamed_addr constant [9 x i8] c"an error\00", align 1 13 14 define i32 @test1(i32 %a) #0 { 15 ; CHECK-LABEL: @test1 16 entry: 17 %cmp = icmp sgt i32 %a, 8 18 br i1 %cmp, label %if.then, label %return 19 20 if.then: ; preds = %entry 21 %0 = load %struct._IO_FILE*, %struct._IO_FILE** @stderr, align 8 22 %call = tail call i32 (%struct._IO_FILE*, i8*, ...) @fprintf(%struct._IO_FILE* %0, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %a) #1 23 br label %return 24 25 ; CHECK: %call = tail call i32 (%struct._IO_FILE*, i8*, ...) @fprintf(%struct._IO_FILE* %0, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %a) #[[AT1:[0-9]+]] 26 27 return: ; preds = %entry, %if.then 28 %retval.0 = phi i32 [ 1, %if.then ], [ 0, %entry ] 29 ret i32 %retval.0 30 } 31 32 declare i32 @fprintf(%struct._IO_FILE* nocapture, i8* nocapture readonly, ...) #1 33 34 define i32 @test2(i32 %a) #0 { 35 ; CHECK-LABEL: @test2 36 entry: 37 %cmp = icmp sgt i32 %a, 8 38 br i1 %cmp, label %if.then, label %return 39 40 if.then: ; preds = %entry 41 %0 = load %struct._IO_FILE*, %struct._IO_FILE** @stderr, align 8 42 %1 = tail call i64 @fwrite(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str1, i64 0, i64 0), i64 8, i64 1, %struct._IO_FILE* %0) 43 br label %return 44 45 ; CHECK: tail call i64 @fwrite(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str1, i64 0, i64 0), i64 8, i64 1, %struct._IO_FILE* %0) #[[AT2:[0-9]+]] 46 47 return: ; preds = %entry, %if.then 48 %retval.0 = phi i32 [ 1, %if.then ], [ 0, %entry ] 49 ret i32 %retval.0 50 } 51 52 declare i64 @fwrite(i8* nocapture, i64, i64, %struct._IO_FILE* nocapture) #1 53 54 define i32 @test3(i32 %a) #0 { 55 ; CHECK-LABEL: @test3 56 entry: 57 %cmp = icmp sgt i32 %a, 8 58 br i1 %cmp, label %if.then, label %return 59 60 if.then: ; preds = %entry 61 %0 = load %struct._IO_FILE*, %struct._IO_FILE** @stdout, align 8 62 %1 = tail call i64 @fwrite(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str1, i64 0, i64 0), i64 8, i64 1, %struct._IO_FILE* %0) 63 br label %return 64 65 ; CHECK-NOT: tail call i64 @fwrite(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str1, i64 0, i64 0), i64 8, i64 1, %struct._IO_FILE* %0) #[[AT2]] 66 67 return: ; preds = %entry, %if.then 68 %retval.0 = phi i32 [ 1, %if.then ], [ 0, %entry ] 69 ret i32 %retval.0 70 } 71 72 attributes #0 = { nounwind uwtable } 73 attributes #1 = { nounwind } 74 75 ; CHECK: attributes #[[AT1]] = { cold nounwind } 76 ; CHECK: attributes #[[AT2]] = { cold } 77 78
