Loop unroller: set thresholds for optsize and minsize functions to zero

Before r268509, Clang would disable the loop unroll pass when optimizing
for size. That commit enabled it to be able to support unroll pragmas
in -Os builds. However, this regressed binary size in one of Chromium's
DLLs with ~100 KB.

This restores the original behaviour of no unrolling at -Os, but doing it
in LLVM instead of Clang makes more sense, and also allows the pragmas to
keep working.

Differential revision: http://reviews.llvm.org/D20115

llvm-svn: 269124

2 files changed, 0 insertions, 74 deletions

diff --git a/llvm/test/Transforms/LoopUnroll/PowerPC/a2-unrolling.ll b/llvm/test/Transforms/LoopUnroll/PowerPC/a2-unrolling.ll
index bf2b9cf40dd..77e92bd7506 100644
--- a/llvm/test/Transforms/LoopUnroll/PowerPC/a2-unrolling.ll
+++ b/llvm/test/Transforms/LoopUnroll/PowerPC/a2-unrolling.ll
@@ -1,30 +1,5 @@
 ; RUN: opt < %s -S -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 -loop-unroll | FileCheck %s -check-prefix=EPILOG
 ; RUN: opt < %s -S -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 -loop-unroll -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG
-define void @unroll_opt_for_size() nounwind optsize {
-entry:
-  br label %loop
-
-loop:
-  %iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
-  %inc = add i32 %iv, 1
-  %exitcnd = icmp uge i32 %inc, 1024
-  br i1 %exitcnd, label %exit, label %loop
-
-exit:
-  ret void
-}
-
-; EPILOG-LABEL: @unroll_opt_for_size
-; EPILOG:      add
-; EPILOG-NEXT: add
-; EPILOG-NEXT: add
-; EPILOG: icmp
-
-; PROLOG-LABEL: @unroll_opt_for_size
-; PROLOG:      add
-; PROLOG-NEXT: add
-; PROLOG-NEXT: add
-; PROLOG: icmp
 
 define i32 @test(i32* nocapture %a, i32 %n) nounwind uwtable readonly {
 entry:
diff --git a/llvm/test/Transforms/LoopUnroll/PowerPC/p7-unrolling.ll b/llvm/test/Transforms/LoopUnroll/PowerPC/p7-unrolling.ll
index 7a50fc0a4f4..c9677d83e37 100644
--- a/llvm/test/Transforms/LoopUnroll/PowerPC/p7-unrolling.ll
+++ b/llvm/test/Transforms/LoopUnroll/PowerPC/p7-unrolling.ll
@@ -1,53 +1,4 @@
 ; RUN: opt < %s -S -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -loop-unroll | FileCheck %s
-define void @unroll_opt_for_size() nounwind optsize {
-entry:
-  br label %loop
-
-loop:
-  %iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
-  %inc = add i32 %iv, 1
-  %exitcnd = icmp uge i32 %inc, 1024
-  br i1 %exitcnd, label %exit, label %loop
-
-exit:
-  ret void
-}
-
-; CHECK-LABEL: @unroll_opt_for_size
-; CHECK:      add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: add
-; CHECK-NEXT: icmp
-
 define void @unroll_default() nounwind {
 entry:
   br label %loop