| ; RUN: opt -aa-pipeline=basic-aa -passes='require<opt-remark-emit>,loop-mssa(licm)' -S %s | FileCheck %s |
| ; RUN: opt -S -passes=licm -verify-memoryssa < %s | FileCheck %s |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| declare void @f() nounwind |
| |
| ; Don't hoist load past nounwind call. |
| define i32 @test1(ptr noalias nocapture readonly %a) nounwind uwtable { |
| ; CHECK-LABEL: @test1( |
| entry: |
| br label %for.body |
| |
| ; CHECK: tail call void @f() |
| ; CHECK-NEXT: load i32 |
| for.body: |
| %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %x.05 = phi i32 [ 0, %entry ], [ %add, %for.body ] |
| tail call void @f() nounwind |
| %i1 = load i32, ptr %a, align 4 |
| %add = add nsw i32 %i1, %x.05 |
| %inc = add nuw nsw i32 %i.06, 1 |
| %exitcond = icmp eq i32 %inc, 1000 |
| br i1 %exitcond, label %for.cond.cleanup, label %for.body |
| |
| for.cond.cleanup: |
| ret i32 %add |
| } |
| |
| ; Don't hoist division past nounwind call. |
| define i32 @test2(i32 %N, i32 %c) nounwind uwtable { |
| ; CHECK-LABEL: @test2( |
| entry: |
| %cmp4 = icmp sgt i32 %N, 0 |
| br i1 %cmp4, label %for.body, label %for.cond.cleanup |
| |
| ; CHECK: tail call void @f() |
| ; CHECK-NEXT: sdiv i32 |
| for.body: |
| %i.05 = phi i32 [ %inc, %for.body ], [ 0, %entry ] |
| tail call void @f() nounwind |
| %div = sdiv i32 5, %c |
| %add = add i32 %i.05, 1 |
| %inc = add i32 %add, %div |
| %cmp = icmp slt i32 %inc, %N |
| br i1 %cmp, label %for.body, label %for.cond.cleanup |
| |
| for.cond.cleanup: |
| ret i32 0 |
| } |
| |
| ; Hoist a non-volatile load past volatile load. |
| define i32 @test3(ptr noalias nocapture readonly %a, ptr %v) nounwind uwtable { |
| ; CHECK-LABEL: @test3( |
| entry: |
| br label %for.body |
| |
| ; CHECK: load i32 |
| ; CHECK: for.body: |
| ; CHECK: load volatile i32 |
| ; CHECK-NOT: load |
| for.body: |
| %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %x.05 = phi i32 [ 0, %entry ], [ %add, %for.body ] |
| %xxx = load volatile i32, ptr %v, align 4 |
| %i1 = load i32, ptr %a, align 4 |
| %add = add nsw i32 %i1, %x.05 |
| %inc = add nuw nsw i32 %i.06, 1 |
| %exitcond = icmp eq i32 %inc, 1000 |
| br i1 %exitcond, label %for.cond.cleanup, label %for.body |
| |
| for.cond.cleanup: |
| ret i32 %add |
| } |
| |
| ; Don't a volatile load past volatile load. |
| define i32 @test4(ptr noalias nocapture readonly %a, ptr %v) nounwind uwtable { |
| ; CHECK-LABEL: @test4( |
| entry: |
| br label %for.body |
| |
| ; CHECK: for.body: |
| ; CHECK: load volatile i32 |
| ; CHECK-NEXT: load volatile i32 |
| for.body: |
| %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %x.05 = phi i32 [ 0, %entry ], [ %add, %for.body ] |
| %xxx = load volatile i32, ptr %v, align 4 |
| %i1 = load volatile i32, ptr %a, align 4 |
| %add = add nsw i32 %i1, %x.05 |
| %inc = add nuw nsw i32 %i.06, 1 |
| %exitcond = icmp eq i32 %inc, 1000 |
| br i1 %exitcond, label %for.cond.cleanup, label %for.body |
| |
| for.cond.cleanup: |
| ret i32 %add |
| } |