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[optnone] Skip pass Constant Hoisting on optnone functions.

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Added test CodeGen/X86/constant-hoisting-optnone.ll to verify that
pass Constant Hoisting is not run on optnone functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229258 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrea Di Biagio
2015-02-14 15:11:48 +00:00
parent fba633f4b6
commit 47cd120a18
2 changed files with 24 additions and 0 deletions
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3
lib/Transforms/Scalar/ConstantHoisting.cpp
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@@ -186,6 +186,9 @@ FunctionPass *llvm::createConstantHoistingPass() {
/// \brief Perform the constant hoisting optimization for the given function. /// \brief Perform the constant hoisting optimization for the given function.
bool ConstantHoisting::runOnFunction(Function &Fn) { bool ConstantHoisting::runOnFunction(Function &Fn) {
if (skipOptnoneFunction(Fn))
return false;
DEBUG(dbgs() << "********** Begin Constant Hoisting **********\n"); DEBUG(dbgs() << "********** Begin Constant Hoisting **********\n");
DEBUG(dbgs() << "********** Function: " << Fn.getName() << '\n'); DEBUG(dbgs() << "********** Function: " << Fn.getName() << '\n');

21
test/CodeGen/X86/constant-hoisting-optnone.ll Normal file
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@@ -0,0 +1,21 @@
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=generic | FileCheck %s
;
; Verify that pass 'Constant Hoisting' is not run on optnone functions.
; Without optnone, Pass 'Constant Hoisting' would firstly hoist
; constant 0xBEEBEEBEC, and then rebase the other constant
; (i.e. constant 0xBEEBEEBF4) with respect to the previous one.
; With optnone, we check that constants are not coalesced.
define i64 @constant_hoisting_optnone() #0 {
; CHECK-LABEL: @constant_hoisting_optnone
; CHECK-DAG: movabsq {{.*#+}} imm = 0xBEEBEEBF4
; CHECK-DAG: movabsq {{.*#+}} imm = 0xBEEBEEBEC
; CHECK: ret
entry:
%0 = load i64* inttoptr (i64 51250129900 to i64*)
%1 = load i64* inttoptr (i64 51250129908 to i64*)
%2 = add i64 %0, %1
ret i64 %2
}
attributes #0 = { optnone noinline }