[PATCH] D85578: [test][LoopUnroll] Cleanup FullUnroll.ll

[Arthur Eubanks via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG72effd8d5b08: [test][LoopUnroll] Cleanup FullUnroll.ll (authored by aeubanks).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D85578/new/

https://reviews.llvm.org/D85578

Files:
  llvm/test/Transforms/LoopUnroll/FullUnroll.ll


Index: llvm/test/Transforms/LoopUnroll/FullUnroll.ll
===================================================================
--- llvm/test/Transforms/LoopUnroll/FullUnroll.ll
+++ llvm/test/Transforms/LoopUnroll/FullUnroll.ll
@@ -1,70 +1,41 @@
-; RUN: opt -passes='default<O1>' -disable-verify --mtriple x86_64-pc-linux-gnu -disable-loop-unrolling=true \
-; RUN: -S -o - %s | FileCheck %s
+; RUN: opt -passes='loop-unroll-full' -disable-verify --mtriple x86_64-pc-linux-gnu -S -o - %s | FileCheck %s
 
 ; This checks that the loop full unroller will fire in the new pass manager
 ; when forced via #pragma in the source (or annotation in the code).
-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"
 
-; We don't end up deleting the loop, merely turning it infinite, but we remove
-; everything inside of it so check for the loop structure and absence of
-; conditional branches.
-; CHECK-LABEL: bb
-; CHECK: br label
-; CHECK-NOT: br i1
-; CHECK: br label
+; Completely unroll the inner loop
+; CHECK-LABEL: @foo
+; CHECK: br i1
 ; CHECK-NOT: br i1
 
 ; Function Attrs: noinline nounwind optnone uwtable
-define void @foo() #0 {
+define void @foo() local_unnamed_addr #0 {
 bb:
   %tmp = alloca [5 x i32*], align 16
-  %tmp1 = alloca i32, align 4
-  %tmp2 = alloca i32, align 4
-  store i32 5, i32* %tmp1, align 4
-  br label %bb3
-
-bb3:                                              ; preds = %bb23, %bb
-  %tmp4 = load i32, i32* %tmp1, align 4
-  %tmp5 = icmp ne i32 %tmp4, 0
-  br i1 %tmp5, label %bb6, label %bb24
+  br label %bb7.preheader
 
-bb6:                                              ; preds = %bb3
-  store i32 0, i32* %tmp2, align 4
-  br label %bb7
+bb3.loopexit:                                     ; preds = %bb10
+  %spec.select.lcssa = phi i32 [ %spec.select, %bb10 ]
+  %tmp5.not = icmp eq i32 %spec.select.lcssa, 0
+  br i1 %tmp5.not, label %bb24, label %bb7.preheader
 
-bb7:                                              ; preds = %bb20, %bb6
-  %tmp8 = load i32, i32* %tmp2, align 4
-  %tmp9 = icmp slt i32 %tmp8, 5
-  br i1 %tmp9, label %bb10, label %bb23
+bb7.preheader:                                    ; preds = %bb3.loopexit, %bb
+  %tmp1.06 = phi i32 [ 5, %bb ], [ %spec.select.lcssa, %bb3.loopexit ]
+  br label %bb10
 
-bb10:                                             ; preds = %bb7
-  %tmp11 = load i32, i32* %tmp2, align 4
-  %tmp12 = sext i32 %tmp11 to i64
-  %tmp13 = getelementptr inbounds [5 x i32*], [5 x i32*]* %tmp, i64 0, i64 %tmp12
+bb10:                                             ; preds = %bb10, %bb7.preheader
+  %indvars.iv = phi i64 [ 0, %bb7.preheader ], [ %indvars.iv.next, %bb10 ]
+  %tmp1.14 = phi i32 [ %tmp1.06, %bb7.preheader ], [ %spec.select, %bb10 ]
+  %tmp13 = getelementptr inbounds [5 x i32*], [5 x i32*]* %tmp, i64 0, i64 %indvars.iv
   %tmp14 = load i32*, i32** %tmp13, align 8
-  %tmp15 = icmp ne i32* %tmp14, null
-  br i1 %tmp15, label %bb16, label %bb19
-
-bb16:                                             ; preds = %bb10
-  %tmp17 = load i32, i32* %tmp1, align 4
-  %tmp18 = add nsw i32 %tmp17, -1
-  store i32 %tmp18, i32* %tmp1, align 4
-  br label %bb19
-
-bb19:                                             ; preds = %bb16, %bb10
-  br label %bb20
-
-bb20:                                             ; preds = %bb19
-  %tmp21 = load i32, i32* %tmp2, align 4
-  %tmp22 = add nsw i32 %tmp21, 1
-  store i32 %tmp22, i32* %tmp2, align 4
-  br label %bb7, !llvm.loop !1
-
-bb23:                                             ; preds = %bb7
-  br label %bb3
-
-bb24:                                             ; preds = %bb3
+  %tmp15.not = icmp ne i32* %tmp14, null
+  %tmp18 = sext i1 %tmp15.not to i32
+  %spec.select = add nsw i32 %tmp1.14, %tmp18
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond.not = icmp eq i64 %indvars.iv.next, 5
+  br i1 %exitcond.not, label %bb3.loopexit, label %bb10, !llvm.loop !1
+
+bb24:                                             ; preds = %bb3.loopexit
   ret void
 }
 


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