| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -S -passes=gvn < %s | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; The load in the loop can not bypass the data from the previous loop. The store above it in the loop aliases. |
| define void @foo() { |
| ; CHECK-LABEL: @foo( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[A:%.*]] = alloca [3 x i32], align 4 |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.cond.cleanup: |
| ; CHECK-NEXT: ret void |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 1, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ] |
| ; CHECK-NEXT: [[P_017:%.*]] = phi ptr [ undef, [[ENTRY]] ], [ [[ARRAYIDX3:%.*]], [[FOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP0:%.*]] = add nsw i64 [[INDVARS_IV]], -1 |
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [3 x i32], ptr [[A]], i64 0, i64 [[TMP0]] |
| ; CHECK-NEXT: store i32 50, ptr [[ARRAYIDX]], align 4 |
| ; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[INDVARS_IV]], 1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[P_017]], align 4 |
| ; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP1]] to i32 |
| ; CHECK-NEXT: [[ADD1:%.*]] = add nsw i32 [[TMP2]], [[TMP3]] |
| ; CHECK-NEXT: [[ARRAYIDX3]] = getelementptr inbounds [3 x i32], ptr [[A]], i64 0, i64 [[INDVARS_IV]] |
| ; CHECK-NEXT: store i32 60, ptr [[ARRAYIDX3]], align 4 |
| ; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1 |
| ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], 3 |
| ; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP:%.*]] |
| ; |
| entry: |
| %a = alloca [3 x i32], align 4 |
| br label %for.body |
| |
| for.cond.cleanup: ; preds = %for.body |
| ret void |
| |
| for.body: ; preds = %for.body, %entry |
| %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ] |
| %p.017 = phi ptr [ undef, %entry ], [ %arrayidx3, %for.body ] |
| %0 = add nsw i64 %indvars.iv, -1 |
| %arrayidx = getelementptr inbounds [3 x i32], ptr %a, i64 0, i64 %0 |
| store i32 50, ptr %arrayidx, align 4 |
| %1 = shl i64 %indvars.iv, 1 |
| %2 = load i32, ptr %p.017, align 4 |
| %3 = trunc i64 %1 to i32 |
| %add1 = add nsw i32 %2, %3 |
| %arrayidx3 = getelementptr inbounds [3 x i32], ptr %a, i64 0, i64 %indvars.iv |
| store i32 60, ptr %arrayidx3, align 4 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp ne i64 %indvars.iv.next, 3 |
| br i1 %exitcond, label %for.body, label %for.cond.cleanup |
| } |