| ; RUN: opt -lower-expect -strip-dead-prototypes -S -o - < %s | FileCheck %s |
| |
| ; CHECK: @test1 |
| define i32 @test1(i32 %x) nounwind uwtable ssp { |
| entry: |
| %retval = alloca i32, align 4 |
| %x.addr = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| %tmp = load i32* %x.addr, align 4 |
| %cmp = icmp sgt i32 %tmp, 1 |
| %conv = zext i1 %cmp to i32 |
| %conv1 = sext i32 %conv to i64 |
| %expval = call i64 @llvm.expect.i64(i64 %conv1, i64 1) |
| %tobool = icmp ne i64 %expval, 0 |
| ; CHECK: !prof !0 |
| ; CHECK-NOT: @llvm.expect |
| br i1 %tobool, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %call = call i32 (...)* @f() |
| store i32 %call, i32* %retval |
| br label %return |
| |
| if.end: ; preds = %entry |
| store i32 1, i32* %retval |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %0 = load i32* %retval |
| ret i32 %0 |
| } |
| |
| declare i64 @llvm.expect.i64(i64, i64) nounwind readnone |
| |
| declare i32 @f(...) |
| |
| ; CHECK: @test2 |
| define i32 @test2(i32 %x) nounwind uwtable ssp { |
| entry: |
| %retval = alloca i32, align 4 |
| %x.addr = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| %tmp = load i32* %x.addr, align 4 |
| %conv = sext i32 %tmp to i64 |
| %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1) |
| %tobool = icmp ne i64 %expval, 0 |
| ; CHECK: !prof !0 |
| ; CHECK-NOT: @llvm.expect |
| br i1 %tobool, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %call = call i32 (...)* @f() |
| store i32 %call, i32* %retval |
| br label %return |
| |
| if.end: ; preds = %entry |
| store i32 1, i32* %retval |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %0 = load i32* %retval |
| ret i32 %0 |
| } |
| |
| ; CHECK: @test3 |
| define i32 @test3(i32 %x) nounwind uwtable ssp { |
| entry: |
| %retval = alloca i32, align 4 |
| %x.addr = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| %tmp = load i32* %x.addr, align 4 |
| %tobool = icmp ne i32 %tmp, 0 |
| %lnot = xor i1 %tobool, true |
| %lnot.ext = zext i1 %lnot to i32 |
| %conv = sext i32 %lnot.ext to i64 |
| %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1) |
| %tobool1 = icmp ne i64 %expval, 0 |
| ; CHECK: !prof !0 |
| ; CHECK-NOT: @llvm.expect |
| br i1 %tobool1, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %call = call i32 (...)* @f() |
| store i32 %call, i32* %retval |
| br label %return |
| |
| if.end: ; preds = %entry |
| store i32 1, i32* %retval |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %0 = load i32* %retval |
| ret i32 %0 |
| } |
| |
| ; CHECK: @test4 |
| define i32 @test4(i32 %x) nounwind uwtable ssp { |
| entry: |
| %retval = alloca i32, align 4 |
| %x.addr = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| %tmp = load i32* %x.addr, align 4 |
| %tobool = icmp ne i32 %tmp, 0 |
| %lnot = xor i1 %tobool, true |
| %lnot1 = xor i1 %lnot, true |
| %lnot.ext = zext i1 %lnot1 to i32 |
| %conv = sext i32 %lnot.ext to i64 |
| %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1) |
| %tobool2 = icmp ne i64 %expval, 0 |
| ; CHECK: !prof !0 |
| ; CHECK-NOT: @llvm.expect |
| br i1 %tobool2, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %call = call i32 (...)* @f() |
| store i32 %call, i32* %retval |
| br label %return |
| |
| if.end: ; preds = %entry |
| store i32 1, i32* %retval |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %0 = load i32* %retval |
| ret i32 %0 |
| } |
| |
| ; CHECK: @test5 |
| define i32 @test5(i32 %x) nounwind uwtable ssp { |
| entry: |
| %retval = alloca i32, align 4 |
| %x.addr = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| %tmp = load i32* %x.addr, align 4 |
| %cmp = icmp slt i32 %tmp, 0 |
| %conv = zext i1 %cmp to i32 |
| %conv1 = sext i32 %conv to i64 |
| %expval = call i64 @llvm.expect.i64(i64 %conv1, i64 0) |
| %tobool = icmp ne i64 %expval, 0 |
| ; CHECK: !prof !1 |
| ; CHECK-NOT: @llvm.expect |
| br i1 %tobool, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %call = call i32 (...)* @f() |
| store i32 %call, i32* %retval |
| br label %return |
| |
| if.end: ; preds = %entry |
| store i32 1, i32* %retval |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %0 = load i32* %retval |
| ret i32 %0 |
| } |
| |
| ; CHECK: @test6 |
| define i32 @test6(i32 %x) nounwind uwtable ssp { |
| entry: |
| %retval = alloca i32, align 4 |
| %x.addr = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| %tmp = load i32* %x.addr, align 4 |
| %conv = sext i32 %tmp to i64 |
| %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1) |
| ; CHECK: !prof !2 |
| ; CHECK-NOT: @llvm.expect |
| switch i64 %expval, label %sw.epilog [ |
| i64 1, label %sw.bb |
| i64 2, label %sw.bb |
| ] |
| |
| sw.bb: ; preds = %entry, %entry |
| store i32 0, i32* %retval |
| br label %return |
| |
| sw.epilog: ; preds = %entry |
| store i32 1, i32* %retval |
| br label %return |
| |
| return: ; preds = %sw.epilog, %sw.bb |
| %0 = load i32* %retval |
| ret i32 %0 |
| } |
| |
| ; CHECK: @test7 |
| define i32 @test7(i32 %x) nounwind uwtable ssp { |
| entry: |
| %retval = alloca i32, align 4 |
| %x.addr = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| %tmp = load i32* %x.addr, align 4 |
| %conv = sext i32 %tmp to i64 |
| %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1) |
| ; CHECK: !prof !3 |
| ; CHECK-NOT: @llvm.expect |
| switch i64 %expval, label %sw.epilog [ |
| i64 2, label %sw.bb |
| i64 3, label %sw.bb |
| ] |
| |
| sw.bb: ; preds = %entry, %entry |
| %tmp1 = load i32* %x.addr, align 4 |
| store i32 %tmp1, i32* %retval |
| br label %return |
| |
| sw.epilog: ; preds = %entry |
| store i32 0, i32* %retval |
| br label %return |
| |
| return: ; preds = %sw.epilog, %sw.bb |
| %0 = load i32* %retval |
| ret i32 %0 |
| } |
| |
| ; CHECK: @test8 |
| define i32 @test8(i32 %x) nounwind uwtable ssp { |
| entry: |
| %retval = alloca i32, align 4 |
| %x.addr = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| %tmp = load i32* %x.addr, align 4 |
| %cmp = icmp sgt i32 %tmp, 1 |
| %conv = zext i1 %cmp to i32 |
| %expval = call i32 @llvm.expect.i32(i32 %conv, i32 1) |
| %tobool = icmp ne i32 %expval, 0 |
| ; CHECK: !prof !0 |
| ; CHECK-NOT: @llvm.expect |
| br i1 %tobool, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %call = call i32 (...)* @f() |
| store i32 %call, i32* %retval |
| br label %return |
| |
| if.end: ; preds = %entry |
| store i32 1, i32* %retval |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %0 = load i32* %retval |
| ret i32 %0 |
| } |
| |
| declare i32 @llvm.expect.i32(i32, i32) nounwind readnone |
| |
| ; CHECK: !0 = metadata !{metadata !"branch_weights", i32 64, i32 4} |
| ; CHECK: !1 = metadata !{metadata !"branch_weights", i32 4, i32 64} |
| ; CHECK: !2 = metadata !{metadata !"branch_weights", i32 4, i32 64, i32 4} |
| ; CHECK: !3 = metadata !{metadata !"branch_weights", i32 64, i32 4, i32 4} |
