llvm-6502/test/Transforms/LowerExpectIntrinsic/basic.ll
Duncan P. N. Exon Smith e6562c5088 Lower llvm.expect intrinsic correctly for i1
LowerExpectIntrinsic previously only understood the idiom of an expect
intrinsic followed by a comparison with zero. For llvm.expect.i1, the
comparison would be stripped by the early-cse pass.

Patch by Daniel Micay.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200664 91177308-0d34-0410-b5e6-96231b3b80d8
2014-02-02 22:43:55 +00:00

281 lines
8.1 KiB
LLVM

; RUN: opt -lower-expect -strip-dead-prototypes -S -o - < %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, 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-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, 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-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, 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-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, 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-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, 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-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, 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-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, 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-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, 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-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, i32* %x.addr, align 4
%tmp = load i32* %x.addr, align 4
%cmp = icmp sgt i32 %tmp, 1
%expval = call i1 @llvm.expect.i1(i1 %cmp, i1 1)
; CHECK: !prof !0
; CHECK-NOT: @llvm.expect
br i1 %expval, 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 i1 @llvm.expect.i1(i1, i1) 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}