; RUN: opt -S -passes='function(lower-expect),strip-dead-prototypes' < %s | FileCheck %s
; CHECK-LABEL: @test1(
define i32 @test1(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %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.with.probability.i64(i64 %conv1, i64 1, double 8.000000e-01)
%tobool = icmp ne i64 %expval, 0
; CHECK: !prof !0
; CHECK-NOT: @llvm.expect.with.probability
br i1 %tobool, label %if.then, label %if.end
if.then: ; preds = %entry
%call = call i32 (...) @f()
store i32 %call, ptr %retval
br label %return
if.end: ; preds = %entry
store i32 1, ptr %retval
br label %return
return: ; preds = %if.end, %if.then
%0 = load i32, ptr %retval
ret i32 %0
}
declare i64 @llvm.expect.with.probability.i64(i64, i64, double) nounwind readnone
declare i32 @f(...)
; CHECK-LABEL: @test2(
define i32 @test2(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %x.addr, align 4
%conv = sext i32 %tmp to i64
%expval = call i64 @llvm.expect.with.probability.i64(i64 %conv, i64 1, double 8.000000e-01)
%tobool = icmp ne i64 %expval, 0
; CHECK: !prof !0
; CHECK-NOT: @llvm.expect.with.probability
br i1 %tobool, label %if.then, label %if.end
if.then: ; preds = %entry
%call = call i32 (...) @f()
store i32 %call, ptr %retval
br label %return
if.end: ; preds = %entry
store i32 1, ptr %retval
br label %return
return: ; preds = %if.end, %if.then
%0 = load i32, ptr %retval
ret i32 %0
}
; CHECK-LABEL: @test3(
define i32 @test3(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %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.with.probability.i64(i64 %conv, i64 1, double 8.000000e-01)
%tobool1 = icmp ne i64 %expval, 0
; CHECK: !prof !0
; CHECK-NOT: @llvm.expect.with.probability
br i1 %tobool1, label %if.then, label %if.end
if.then: ; preds = %entry
%call = call i32 (...) @f()
store i32 %call, ptr %retval
br label %return
if.end: ; preds = %entry
store i32 1, ptr %retval
br label %return
return: ; preds = %if.end, %if.then
%0 = load i32, ptr %retval
ret i32 %0
}
; CHECK-LABEL: @test4(
define i32 @test4(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %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.with.probability.i64(i64 %conv, i64 1, double 8.000000e-01)
%tobool2 = icmp ne i64 %expval, 0
; CHECK: !prof !0
; CHECK-NOT: @llvm.expect.with.probability
br i1 %tobool2, label %if.then, label %if.end
if.then: ; preds = %entry
%call = call i32 (...) @f()
store i32 %call, ptr %retval
br label %return
if.end: ; preds = %entry
store i32 1, ptr %retval
br label %return
return: ; preds = %if.end, %if.then
%0 = load i32, ptr %retval
ret i32 %0
}
; CHECK-LABEL: @test5(
define i32 @test5(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %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.with.probability.i64(i64 %conv1, i64 0, double 8.000000e-01)
%tobool = icmp ne i64 %expval, 0
; CHECK: !prof !1
; CHECK-NOT: @llvm.expect.with.probability
br i1 %tobool, label %if.then, label %if.end
if.then: ; preds = %entry
%call = call i32 (...) @f()
store i32 %call, ptr %retval
br label %return
if.end: ; preds = %entry
store i32 1, ptr %retval
br label %return
return: ; preds = %if.end, %if.then
%0 = load i32, ptr %retval
ret i32 %0
}
; CHECK-LABEL: @test6(
define i32 @test6(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %x.addr, align 4
%conv = sext i32 %tmp to i64
%expval = call i64 @llvm.expect.with.probability.i64(i64 %conv, i64 2, double 8.000000e-01)
; CHECK: !prof !2
; CHECK-NOT: @llvm.expect.with.probability
switch i64 %expval, label %sw.epilog [
i64 1, label %sw.bb
i64 2, label %sw.bb
]
sw.bb: ; preds = %entry, %entry
store i32 0, ptr %retval
br label %return
sw.epilog: ; preds = %entry
store i32 1, ptr %retval
br label %return
return: ; preds = %sw.epilog, %sw.bb
%0 = load i32, ptr %retval
ret i32 %0
}
; CHECK-LABEL: @test7(
define i32 @test7(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %x.addr, align 4
%conv = sext i32 %tmp to i64
%expval = call i64 @llvm.expect.with.probability.i64(i64 %conv, i64 1, double 8.000000e-01)
; CHECK: !prof !3
; CHECK-NOT: @llvm.expect.with.probability
switch i64 %expval, label %sw.epilog [
i64 2, label %sw.bb
i64 3, label %sw.bb
]
sw.bb: ; preds = %entry, %entry
%tmp1 = load i32, ptr %x.addr, align 4
store i32 %tmp1, ptr %retval
br label %return
sw.epilog: ; preds = %entry
store i32 0, ptr %retval
br label %return
return: ; preds = %sw.epilog, %sw.bb
%0 = load i32, ptr %retval
ret i32 %0
}
; CHECK-LABEL: @test8(
define i32 @test8(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %x.addr, align 4
%cmp = icmp sgt i32 %tmp, 1
%conv = zext i1 %cmp to i32
%expval = call i32 @llvm.expect.with.probability.i32(i32 %conv, i32 1, double 8.000000e-01)
%tobool = icmp ne i32 %expval, 0
; CHECK: !prof !0
; CHECK-NOT: @llvm.expect.with.probability
br i1 %tobool, label %if.then, label %if.end
if.then: ; preds = %entry
%call = call i32 (...) @f()
store i32 %call, ptr %retval
br label %return
if.end: ; preds = %entry
store i32 1, ptr %retval
br label %return
return: ; preds = %if.end, %if.then
%0 = load i32, ptr %retval
ret i32 %0
}
declare i32 @llvm.expect.with.probability.i32(i32, i32, double) nounwind readnone
; CHECK-LABEL: @test9(
define i32 @test9(i32 %x) nounwind uwtable ssp {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, ptr %x.addr, align 4
%tmp = load i32, ptr %x.addr, align 4
%cmp = icmp sgt i32 %tmp, 1
%expval = call i1 @llvm.expect.with.probability.i1(i1 %cmp, i1 1, double 8.000000e-01)
; CHECK: !prof !0
; CHECK-NOT: @llvm.expect.with.probability
br i1 %expval, label %if.then, label %if.end
if.then: ; preds = %entry
%call = call i32 (...) @f()
store i32 %call, ptr %retval
br label %return
if.end: ; preds = %entry
store i32 1, ptr %retval
br label %return
return: ; preds = %if.end, %if.then
%0 = load i32, ptr %retval
ret i32 %0
}
; CHECK-LABEL: @test10(
define i32 @test10(i64 %t6) {
%t7 = call i64 @llvm.expect.with.probability.i64(i64 %t6, i64 0, double 8.000000e-01)
%t8 = icmp ne i64 %t7, 0
%t9 = select i1 %t8, i32 1, i32 2
; CHECK: select{{.*}}, !prof !1
ret i32 %t9
}
declare i1 @llvm.expect.with.probability.i1(i1, i1, double) nounwind readnone
; CHECK: !0 = !{!"branch_weights", !"expected", i32 1717986918, i32 429496731}
; CHECK: !1 = !{!"branch_weights", !"expected", i32 429496731, i32 1717986918}
; CHECK: !2 = !{!"branch_weights", !"expected", i32 214748366, i32 214748366, i32 1717986918}
; CHECK: !3 = !{!"branch_weights", !"expected", i32 1717986918, i32 214748366, i32 214748366}
Codebase Browser
llvm