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32b845d223
See r230786 and r230794 for similar changes to gep and load
respectively.
Call is a bit different because it often doesn't have a single explicit
type - usually the type is deduced from the arguments, and just the
return type is explicit. In those cases there's no need to change the
IR.
When that's not the case, the IR usually contains the pointer type of
the first operand - but since typed pointers are going away, that
representation is insufficient so I'm just stripping the "pointerness"
of the explicit type away.
This does make the IR a bit weird - it /sort of/ reads like the type of
the first operand: "call void () %x(" but %x is actually of type "void
()*" and will eventually be just of type "ptr". But this seems not too
bad and I don't think it would benefit from repeating the type
("void (), void () * %x(" and then eventually "void (), ptr %x(") as has
been done with gep and load.
This also has a side benefit: since the explicit type is no longer a
pointer, there's no ambiguity between an explicit type and a function
that returns a function pointer. Previously this case needed an explicit
type (eg: a function returning a void() function was written as
"call void () () * @x(" rather than "call void () * @x(" because of the
ambiguity between a function returning a pointer to a void() function
and a function returning void).
No ambiguity means even function pointer return types can just be
written alone, without writing the whole function's type.
This leaves /only/ the varargs case where the explicit type is required.
Given the special type syntax in call instructions, the regex-fu used
for migration was a bit more involved in its own unique way (as every
one of these is) so here it is. Use it in conjunction with the apply.sh
script and associated find/xargs commands I've provided in rr230786 to
migrate your out of tree tests. Do let me know if any of this doesn't
cover your cases & we can iterate on a more general script/regexes to
help others with out of tree tests.
About 9 test cases couldn't be automatically migrated - half of those
were functions returning function pointers, where I just had to manually
delete the function argument types now that we didn't need an explicit
function type there. The other half were typedefs of function types used
in calls - just had to manually drop the * from those.
import fileinput
import sys
import re
pat = re.compile(r'((?:=|:|^|\s)call\s(?:[^@]*?))(\s*$|\s*(?:(?:\[\[[a-zA-Z0-9_]+\]\]|[@%](?:(")?[\\\?@a-zA-Z0-9_.]*?(?(3)"|)|{{.*}}))(?:\(|$)|undef|inttoptr|bitcast|null|asm).*$)')
addrspace_end = re.compile(r"addrspace\(\d+\)\s*\*$")
func_end = re.compile("(?:void.*|\)\s*)\*$")
def conv(match, line):
if not match or re.search(addrspace_end, match.group(1)) or not re.search(func_end, match.group(1)):
return line
return line[:match.start()] + match.group(1)[:match.group(1).rfind('*')].rstrip() + match.group(2) + line[match.end():]
for line in sys.stdin:
sys.stdout.write(conv(re.search(pat, line), line))
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235145 91177308-0d34-0410-b5e6-96231b3b80d8
205 lines
6.3 KiB
LLVM
205 lines
6.3 KiB
LLVM
; RUN: opt < %s -analyze -block-freq | FileCheck %s
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; This code contains three loops. One is triple-nested, the
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; second is double nested and the third is a single loop. At
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; runtime, all three loops execute 1,000,000 times each. We use to
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; give different frequencies to each of the loops because loop
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; scales were limited to no more than 4,096.
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;
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; This was penalizing the hotness of the second and third loops
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; because BFI was reducing the loop scale for for.cond16 and
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; for.cond26 to a max of 4,096.
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;
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; Without this restriction, all loops are now correctly given the same
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; frequency values.
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;
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; Original C code:
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;
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;
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; int g;
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; __attribute__((noinline)) void bar() {
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; g++;
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; }
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;
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; extern int printf(const char*, ...);
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;
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; int main()
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; {
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; int i, j, k;
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;
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; g = 0;
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; for (i = 0; i < 100; i++)
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; for (j = 0; j < 100; j++)
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; for (k = 0; k < 100; k++)
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; bar();
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;
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; printf ("g = %d\n", g);
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; g = 0;
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;
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; for (i = 0; i < 100; i++)
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; for (j = 0; j < 10000; j++)
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; bar();
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;
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; printf ("g = %d\n", g);
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; g = 0;
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;
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;
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; for (i = 0; i < 1000000; i++)
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; bar();
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;
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; printf ("g = %d\n", g);
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; g = 0;
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; }
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@g = common global i32 0, align 4
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@.str = private unnamed_addr constant [8 x i8] c"g = %d\0A\00", align 1
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declare void @bar()
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declare i32 @printf(i8*, ...)
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; CHECK: Printing analysis {{.*}} for function 'main':
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; CHECK-NEXT: block-frequency-info: main
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define i32 @main() {
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entry:
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%retval = alloca i32, align 4
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%i = alloca i32, align 4
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%j = alloca i32, align 4
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%k = alloca i32, align 4
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store i32 0, i32* %retval
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store i32 0, i32* @g, align 4
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store i32 0, i32* %i, align 4
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br label %for.cond
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for.cond: ; preds = %for.inc10, %entry
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%0 = load i32, i32* %i, align 4
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%cmp = icmp slt i32 %0, 100
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br i1 %cmp, label %for.body, label %for.end12, !prof !1
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for.body: ; preds = %for.cond
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store i32 0, i32* %j, align 4
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br label %for.cond1
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for.cond1: ; preds = %for.inc7, %for.body
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%1 = load i32, i32* %j, align 4
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%cmp2 = icmp slt i32 %1, 100
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br i1 %cmp2, label %for.body3, label %for.end9, !prof !2
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for.body3: ; preds = %for.cond1
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store i32 0, i32* %k, align 4
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br label %for.cond4
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for.cond4: ; preds = %for.inc, %for.body3
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%2 = load i32, i32* %k, align 4
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%cmp5 = icmp slt i32 %2, 100
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br i1 %cmp5, label %for.body6, label %for.end, !prof !3
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; CHECK: - for.body6: float = 500000.5, int = 4000003
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for.body6: ; preds = %for.cond4
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call void @bar()
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br label %for.inc
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for.inc: ; preds = %for.body6
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%3 = load i32, i32* %k, align 4
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%inc = add nsw i32 %3, 1
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store i32 %inc, i32* %k, align 4
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br label %for.cond4
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for.end: ; preds = %for.cond4
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br label %for.inc7
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for.inc7: ; preds = %for.end
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%4 = load i32, i32* %j, align 4
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%inc8 = add nsw i32 %4, 1
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store i32 %inc8, i32* %j, align 4
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br label %for.cond1
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for.end9: ; preds = %for.cond1
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br label %for.inc10
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for.inc10: ; preds = %for.end9
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%5 = load i32, i32* %i, align 4
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%inc11 = add nsw i32 %5, 1
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store i32 %inc11, i32* %i, align 4
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br label %for.cond
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for.end12: ; preds = %for.cond
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%6 = load i32, i32* @g, align 4
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%call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i32 0, i32 0), i32 %6)
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store i32 0, i32* @g, align 4
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store i32 0, i32* %i, align 4
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br label %for.cond13
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for.cond13: ; preds = %for.inc22, %for.end12
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%7 = load i32, i32* %i, align 4
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%cmp14 = icmp slt i32 %7, 100
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br i1 %cmp14, label %for.body15, label %for.end24, !prof !1
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for.body15: ; preds = %for.cond13
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store i32 0, i32* %j, align 4
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br label %for.cond16
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for.cond16: ; preds = %for.inc19, %for.body15
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%8 = load i32, i32* %j, align 4
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%cmp17 = icmp slt i32 %8, 10000
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br i1 %cmp17, label %for.body18, label %for.end21, !prof !4
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; CHECK: - for.body18: float = 500000.5, int = 4000003
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for.body18: ; preds = %for.cond16
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call void @bar()
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br label %for.inc19
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for.inc19: ; preds = %for.body18
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%9 = load i32, i32* %j, align 4
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%inc20 = add nsw i32 %9, 1
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store i32 %inc20, i32* %j, align 4
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br label %for.cond16
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for.end21: ; preds = %for.cond16
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br label %for.inc22
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for.inc22: ; preds = %for.end21
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%10 = load i32, i32* %i, align 4
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%inc23 = add nsw i32 %10, 1
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store i32 %inc23, i32* %i, align 4
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br label %for.cond13
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for.end24: ; preds = %for.cond13
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%11 = load i32, i32* @g, align 4
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%call25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i32 0, i32 0), i32 %11)
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store i32 0, i32* @g, align 4
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store i32 0, i32* %i, align 4
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br label %for.cond26
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for.cond26: ; preds = %for.inc29, %for.end24
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%12 = load i32, i32* %i, align 4
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%cmp27 = icmp slt i32 %12, 1000000
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br i1 %cmp27, label %for.body28, label %for.end31, !prof !5
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; CHECK: - for.body28: float = 500000.5, int = 4000003
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for.body28: ; preds = %for.cond26
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call void @bar()
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br label %for.inc29
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for.inc29: ; preds = %for.body28
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%13 = load i32, i32* %i, align 4
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%inc30 = add nsw i32 %13, 1
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store i32 %inc30, i32* %i, align 4
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br label %for.cond26
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for.end31: ; preds = %for.cond26
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%14 = load i32, i32* @g, align 4
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%call32 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i32 0, i32 0), i32 %14)
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store i32 0, i32* @g, align 4
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%15 = load i32, i32* %retval
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ret i32 %15
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}
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!llvm.ident = !{!0}
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!0 = !{!"clang version 3.7.0 (trunk 232635) (llvm/trunk 232636)"}
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!1 = !{!"branch_weights", i32 101, i32 2}
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!2 = !{!"branch_weights", i32 10001, i32 101}
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!3 = !{!"branch_weights", i32 1000001, i32 10001}
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!4 = !{!"branch_weights", i32 1000001, i32 101}
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!5 = !{!"branch_weights", i32 1000001, i32 2}
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