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llvm-mirror/test/tools/llvm-extract/extract-block.ll
Teresa Johnson 6eeef9bcbf [hot-cold-split] Name split functions with ".cold" suffix
Summary:
The current default of appending "_"+entry block label to the new
extracted cold function breaks demangling. Change the deliminator from
"_" to "." to enable demangling. Because the header block label will
be empty for release compile code, use "extracted" after the "." when
the label is empty.

Additionally, add a mechanism for the client to pass in an alternate
suffix applied after the ".", and have the hot cold split pass use
"cold."+Count, where the Count is currently 1 but can be used to
uniquely number multiple cold functions split out from the same function
with D53588.

Reviewers: sebpop, hiraditya

Subscribers: llvm-commits, erik.pilkington

Differential Revision: https://reviews.llvm.org/D53534

llvm-svn: 345178
2018-10-24 18:53:47 +00:00

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LLVM

; RUN: llvm-extract -S -bb foo:bb4 %s | FileCheck %s
; CHECK: declare void @bar()
define void @bar() {
bb:
ret void
}
; CHECK-NOT: @unused()
define void @unused() {
bb:
ret void
}
; CHECK: @foo.bb4
; CHECK: call void @bar()
; CHECK: %tmp5
define i32 @foo(i32 %arg) {
bb:
%tmp = alloca i32, align 4
%tmp1 = alloca i32, align 4
store i32 %arg, i32* %tmp1, align 4
%tmp2 = load i32, i32* %tmp1, align 4
%tmp3 = icmp sgt i32 %tmp2, 0
br i1 %tmp3, label %bb4, label %bb7
bb4: ; preds = %bb
call void @bar()
%tmp5 = load i32, i32* %tmp1, align 4
%tmp6 = add nsw i32 %tmp5, 1
store i32 %tmp6, i32* %tmp1, align 4
store i32 %tmp6, i32* %tmp, align 4
br label %bb8
bb7: ; preds = %bb
store i32 0, i32* %tmp, align 4
br label %bb8
bb8: ; preds = %bb7, %bb4
%tmp9 = load i32, i32* %tmp, align 4
ret i32 %tmp9
}