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[PGO][test] Add test to check memops changes function hash

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Following up D84782.

Differential Revision: https://reviews.llvm.org/D84953
This commit is contained in:
Hiroshi Yamauchi 2020-07-30 11:22:25 -07:00
parent de5226d60a
commit 927aad42d8
1 changed files with 25 additions and 0 deletions
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25
test/Transforms/PGOProfile/memop_hash.ll Normal file
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; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s
; RUN: opt < %s -passes=pgo-instr-gen -S | FileCheck %s
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i1)
define i64 @foo1(i8* %a, i8* %b, i32 %s) {
entry:
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %b, i32 %s, i1 false);
ret i64 0
}
define i64 @foo2(i8* %a, i8* %b, i32 %s) {
entry:
ret i64 0
}
; The two hashes should not be equal as the existence of the memcpy should change the hash.
;
; CHECK: @foo1
; CHECK: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @__profn_foo1, i32 0, i32 0), i64 [[FOO1_HASH:[0-9]+]], i32 1, i32 0)
; CHECK: @foo2
; CHECK-NOT: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @__profn_foo2, i32 0, i32 0), i64 [[FOO1_HASH]], i32 1, i32 0)