From bbe4ff10df2cf0e2bd35d84f403c35d27290d375 Mon Sep 17 00:00:00 2001
From: Philip Reames <listmail@philipreames.com>
Date: Tue, 14 May 2019 16:37:29 +0000
Subject: [PATCH] [Test] Autogen a test for ease of later changing

llvm-svn: 360690
---
 .../IndVarSimplify/rewrite-loop-exit-value.ll      | 89 +++++++++++++++-------
 1 file changed, 61 insertions(+), 28 deletions(-)

diff --git a/llvm/test/Transforms/IndVarSimplify/rewrite-loop-exit-value.ll b/llvm/test/Transforms/IndVarSimplify/rewrite-loop-exit-value.ll
index 6993946..c8a0c5d 100644
--- a/llvm/test/Transforms/IndVarSimplify/rewrite-loop-exit-value.ll
+++ b/llvm/test/Transforms/IndVarSimplify/rewrite-loop-exit-value.ll
@@ -1,63 +1,96 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt -indvars -instcombine -S < %s | FileCheck %s
 
 ;; Test that loop's exit value is rewritten to its initial
 ;; value from loop preheader
 define i32 @test1(i32* %var) {
-; CHECK-LABEL: @test1
+; CHECK-LABEL: @test1(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32* [[VAR:%.*]], null
+; CHECK-NEXT:    br label [[HEADER:%.*]]
+; CHECK:       header:
+; CHECK-NEXT:    br i1 [[COND]], label [[LOOP:%.*]], label [[EXIT:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    br label [[HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 0
+;
 entry:
- %cond = icmp eq i32* %var, null 
- br label %header
+  %cond = icmp eq i32* %var, null
+  br label %header
 
 header:
- %phi_indvar = phi i32 [0, %entry], [%indvar, %loop]
- br i1 %cond, label %loop, label %exit
+  %phi_indvar = phi i32 [0, %entry], [%indvar, %loop]
+  br i1 %cond, label %loop, label %exit
 
 loop:
- %indvar = add i32 %phi_indvar, 1
- br label %header
+  %indvar = add i32 %phi_indvar, 1
+  br label %header
 
 exit:
-; CHECK: ret i32 0
- ret i32 %phi_indvar
+  ret i32 %phi_indvar
 }
 
 ;; Test that we can not rewrite loop exit value if it's not
 ;; a phi node (%indvar is an add instruction in this test).
 define i32 @test2(i32* %var) {
-; CHECK-LABEL: @test2
+; CHECK-LABEL: @test2(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32* [[VAR:%.*]], null
+; CHECK-NEXT:    br label [[HEADER:%.*]]
+; CHECK:       header:
+; CHECK-NEXT:    [[PHI_INDVAR:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INDVAR:%.*]], [[HEADER]] ]
+; CHECK-NEXT:    [[INDVAR]] = add i32 [[PHI_INDVAR]], 1
+; CHECK-NEXT:    br i1 [[COND]], label [[HEADER]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[INDVAR]]
+;
 entry:
- %cond = icmp eq i32* %var, null 
- br label %header
+  %cond = icmp eq i32* %var, null
+  br label %header
 
 header:
- %phi_indvar = phi i32 [0, %entry], [%indvar, %header]
- %indvar = add i32 %phi_indvar, 1
- br i1 %cond, label %header, label %exit
+  %phi_indvar = phi i32 [0, %entry], [%indvar, %header]
+  %indvar = add i32 %phi_indvar, 1
+  br i1 %cond, label %header, label %exit
 
 exit:
-; CHECK: ret i32 %indvar
- ret i32 %indvar
+  ret i32 %indvar
 }
 
 ;; Test that we can not rewrite loop exit value if the condition
 ;; is not in loop header.
 define i32 @test3(i32* %var) {
-; CHECK-LABEL: @test3
+; CHECK-LABEL: @test3(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[COND1:%.*]] = icmp eq i32* [[VAR:%.*]], null
+; CHECK-NEXT:    br label [[HEADER:%.*]]
+; CHECK:       header:
+; CHECK-NEXT:    [[PHI_INDVAR:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INDVAR:%.*]], [[HEADER_BACKEDGE:%.*]] ]
+; CHECK-NEXT:    [[INDVAR]] = add i32 [[PHI_INDVAR]], 1
+; CHECK-NEXT:    [[COND2:%.*]] = icmp eq i32 [[INDVAR]], 10
+; CHECK-NEXT:    br i1 [[COND2]], label [[HEADER_BACKEDGE]], label [[BODY:%.*]]
+; CHECK:       header.backedge:
+; CHECK-NEXT:    br label [[HEADER]]
+; CHECK:       body:
+; CHECK-NEXT:    br i1 [[COND1]], label [[HEADER_BACKEDGE]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret i32 [[PHI_INDVAR]]
+;
 entry:
- %cond1 = icmp eq i32* %var, null 
- br label %header
+  %cond1 = icmp eq i32* %var, null
+  br label %header
 
 header:
- %phi_indvar = phi i32 [0, %entry], [%indvar, %header], [%indvar, %body]
- %indvar = add i32 %phi_indvar, 1
- %cond2 = icmp eq i32 %indvar, 10
- br i1 %cond2, label %header, label %body
- 
+  %phi_indvar = phi i32 [0, %entry], [%indvar, %header], [%indvar, %body]
+  %indvar = add i32 %phi_indvar, 1
+  %cond2 = icmp eq i32 %indvar, 10
+  br i1 %cond2, label %header, label %body
+
 body:
- br i1 %cond1, label %header, label %exit
+  br i1 %cond1, label %header, label %exit
 
 exit:
-; CHECK: ret i32 %phi_indvar
- ret i32 %phi_indvar
+  ret i32 %phi_indvar
 }
 
-- 
2.7.4