mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-26 04:32:44 +01:00
9c5542c040
Now that `Metadata` is typeless, reflect that in the assembly. These
are the matching assembly changes for the metadata/value split in
r223802.
- Only use the `metadata` type when referencing metadata from a call
intrinsic -- i.e., only when it's used as a `Value`.
- Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode`
when referencing it from call intrinsics.
So, assembly like this:
define @foo(i32 %v) {
call void @llvm.foo(metadata !{i32 %v}, metadata !0)
call void @llvm.foo(metadata !{i32 7}, metadata !0)
call void @llvm.foo(metadata !1, metadata !0)
call void @llvm.foo(metadata !3, metadata !0)
call void @llvm.foo(metadata !{metadata !3}, metadata !0)
ret void, !bar !2
}
!0 = metadata !{metadata !2}
!1 = metadata !{i32* @global}
!2 = metadata !{metadata !3}
!3 = metadata !{}
turns into this:
define @foo(i32 %v) {
call void @llvm.foo(metadata i32 %v, metadata !0)
call void @llvm.foo(metadata i32 7, metadata !0)
call void @llvm.foo(metadata i32* @global, metadata !0)
call void @llvm.foo(metadata !3, metadata !0)
call void @llvm.foo(metadata !{!3}, metadata !0)
ret void, !bar !2
}
!0 = !{!2}
!1 = !{i32* @global}
!2 = !{!3}
!3 = !{}
I wrote an upgrade script that handled almost all of the tests in llvm
and many of the tests in cfe (even handling many `CHECK` lines). I've
attached it (or will attach it in a moment if you're speedy) to PR21532
to help everyone update their out-of-tree testcases.
This is part of PR21532.
llvm-svn: 224257
91 lines
3.5 KiB
LLVM
91 lines
3.5 KiB
LLVM
; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/discriminator.prof | opt -analyze -branch-prob | FileCheck %s
|
|
|
|
; Original code
|
|
;
|
|
; 1 int foo(int i) {
|
|
; 2 int x = 0;
|
|
; 3 while (i < 100) {
|
|
; 4 if (i < 5) x--;
|
|
; 5 i++;
|
|
; 6 }
|
|
; 7 return x;
|
|
; 8 }
|
|
;
|
|
; In this test, if the loop is executed 100 times, the decrement operation
|
|
; at line 4 should only execute 5 times. This is reflected in the profile
|
|
; data for line offset 3. In Inputs/discriminator.prof, we have:
|
|
;
|
|
; 3: 100
|
|
; 3.1: 5
|
|
;
|
|
; This means that the predicate 'i < 5' (line 3) is executed 100 times,
|
|
; but the then branch (line 3.1) is only executed 5 times.
|
|
|
|
define i32 @foo(i32 %i) #0 {
|
|
; CHECK: Printing analysis 'Branch Probability Analysis' for function 'foo':
|
|
entry:
|
|
%i.addr = alloca i32, align 4
|
|
%x = alloca i32, align 4
|
|
store i32 %i, i32* %i.addr, align 4
|
|
store i32 0, i32* %x, align 4, !dbg !10
|
|
br label %while.cond, !dbg !11
|
|
|
|
while.cond: ; preds = %if.end, %entry
|
|
%0 = load i32* %i.addr, align 4, !dbg !12
|
|
%cmp = icmp slt i32 %0, 100, !dbg !12
|
|
br i1 %cmp, label %while.body, label %while.end, !dbg !12
|
|
; CHECK: edge while.cond -> while.body probability is 100 / 101 = 99.0099% [HOT edge]
|
|
; CHECK: edge while.cond -> while.end probability is 1 / 101 = 0.990099%
|
|
|
|
while.body: ; preds = %while.cond
|
|
%1 = load i32* %i.addr, align 4, !dbg !14
|
|
%cmp1 = icmp slt i32 %1, 50, !dbg !14
|
|
br i1 %cmp1, label %if.then, label %if.end, !dbg !14
|
|
; CHECK: edge while.body -> if.then probability is 5 / 100 = 5%
|
|
; CHECK: edge while.body -> if.end probability is 95 / 100 = 95% [HOT edge]
|
|
|
|
if.then: ; preds = %while.body
|
|
%2 = load i32* %x, align 4, !dbg !17
|
|
%dec = add nsw i32 %2, -1, !dbg !17
|
|
store i32 %dec, i32* %x, align 4, !dbg !17
|
|
br label %if.end, !dbg !17
|
|
|
|
if.end: ; preds = %if.then, %while.body
|
|
%3 = load i32* %i.addr, align 4, !dbg !19
|
|
%inc = add nsw i32 %3, 1, !dbg !19
|
|
store i32 %inc, i32* %i.addr, align 4, !dbg !19
|
|
br label %while.cond, !dbg !20
|
|
|
|
while.end: ; preds = %while.cond
|
|
%4 = load i32* %x, align 4, !dbg !21
|
|
ret i32 %4, !dbg !21
|
|
}
|
|
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!7, !8}
|
|
!llvm.ident = !{!9}
|
|
|
|
!0 = !{!"0x11\0012\00clang version 3.5 \000\00\000\00\000", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [discriminator.c] [DW_LANG_C99]
|
|
!1 = !{!"discriminator.c", !"."}
|
|
!2 = !{}
|
|
!3 = !{!4}
|
|
!4 = !{!"0x2e\00foo\00foo\00\001\000\001\000\006\00256\000\001", !1, !5, !6, null, i32 (i32)* @foo, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [foo]
|
|
!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [discriminator.c]
|
|
!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !2, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
|
|
!7 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!8 = !{i32 1, !"Debug Info Version", i32 2}
|
|
!9 = !{!"clang version 3.5 "}
|
|
!10 = !{i32 2, i32 0, !4, null}
|
|
!11 = !{i32 3, i32 0, !4, null}
|
|
!12 = !{i32 3, i32 0, !13, null}
|
|
!13 = !{!"0xb\001", !1, !4} ; [ DW_TAG_lexical_block ] [discriminator.c]
|
|
!14 = !{i32 4, i32 0, !15, null}
|
|
!15 = !{!"0xb\004\000\001", !1, !16} ; [ DW_TAG_lexical_block ] [discriminator.c]
|
|
!16 = !{!"0xb\003\000\000", !1, !4} ; [ DW_TAG_lexical_block ] [discriminator.c]
|
|
!17 = !{i32 4, i32 0, !18, null}
|
|
!18 = !{!"0xb\001", !1, !15} ; [ DW_TAG_lexical_block ] [discriminator.c]
|
|
!19 = !{i32 5, i32 0, !16, null}
|
|
!20 = !{i32 6, i32 0, !16, null}
|
|
!21 = !{i32 7, i32 0, !4, null}
|