builtin-expect.ll
6.47 KB
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; RUN: llc < %s
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, 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
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, i32* %retval
ret i32 %0
}
declare i64 @llvm.expect.i64(i64, i64) nounwind readnone
declare i32 @f(...)
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, 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
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, i32* %retval
ret i32 %0
}
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, 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
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, i32* %retval
ret i32 %0
}
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, 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
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, i32* %retval
ret i32 %0
}
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, 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
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, i32* %retval
ret i32 %0
}
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, i32* %x.addr, align 4
%conv = sext i32 %tmp to i64
%expval = call i64 @llvm.expect.i64(i64 %conv, i64 1)
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, i32* %retval
ret i32 %0
}
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, i32* %x.addr, align 4
%conv = sext i32 %tmp to i64
%expval = call i64 @llvm.expect.i64(i64 %conv, i64 1)
switch i64 %expval, label %sw.epilog [
i64 2, label %sw.bb
i64 3, label %sw.bb
]
sw.bb: ; preds = %entry, %entry
%tmp1 = load i32, 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, i32* %retval
ret i32 %0
}
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, 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
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, i32* %retval
ret i32 %0
}
declare i32 @llvm.expect.i32(i32, i32) nounwind readnone