Make the test introduced in r239015 more targeted.

We don't need to go through LSR to trigger this bug.  Instead,
hand-craft a tricky GEP and get the constant folder to hack on it when
parsing the IR.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239017 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Assembler/getelementptr.ll b/test/Assembler/getelementptr.ll
index ee88346eb00b48277fcede05884d513455337396..0a0fddfc4dda7353434ad04c18f7eec2ca3d44f1 100644 (file)
--- a/test/Assembler/getelementptr.ll
+++ b/test/Assembler/getelementptr.ll
@@ -19,6 +19,10 @@
 @y = global i32* getelementptr ({ i32, i32 }, { i32, i32 }* @x, i16 42, i32 0)
 ; CHECK: @y = global i32* getelementptr ({ i32, i32 }, { i32, i32 }* @x, i16 42, i32 0)
 
+@PR23753_a = external global i8
+@PR23753_b = global i8* getelementptr (i8, i8* @PR23753_a, i64 ptrtoint (i8* @PR23753_a to i64))
+; CHECK: @PR23753_b = global i8* getelementptr (i8, i8* @PR23753_a, i64 ptrtoint (i8* @PR23753_a to i64))
+
 ; See if i92 indices work too.
 define i32 *@test({i32, i32}* %t, i92 %n) {
 ; CHECK: @test

diff --git a/test/Transforms/LoopStrengthReduce/pr23753.ll b/test/Transforms/LoopStrengthReduce/pr23753.ll
deleted file mode 100644 (file)
index a6a34b1..0000000
--- a/test/Transforms/LoopStrengthReduce/pr23753.ll
+++ /dev/null
@@ -1,29 +0,0 @@
-; RUN: opt < %s -loop-reduce -S | FileCheck %s
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-@a = external global i32, align 4
-@d = external global i8, align 1
-
-; CHECK-LABEL: void @f
-define void @f() {
-entry:
-  br label %for.body
-
-for.body:
-  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
-  %arrayidx = getelementptr inbounds i32, i32* @a, i64 %indvars.iv
-  %cmp = icmp ne i32* %arrayidx, bitcast (i8* @d to i32*)
-  %indvars.iv.next = add i64 %indvars.iv, 1
-  br i1 %cmp, label %for.body, label %for.end
-
-; CHECK:       %[[phi:.*]] = phi i8* [ %[[gep:.*]], {{.*}} ], [ getelementptr (i8, i8* @d, i64 sub (i64 4, i64 ptrtoint (i32* @a to i64))), {{.*}} ]
-; CHECK-NEXT:  %[[gep]]    = getelementptr i8, i8* %[[phi]], i64 -4
-; CHECK-NEXT:  %[[cst:.*]] = bitcast i8* %[[gep]] to i32*
-; CHECK-NEXT:  %[[cmp:.*]] = icmp ne i32* %[[cst]], null
-; CHECK-NEXT:  br i1 %[[cmp]]
-
-for.end:
-  ret void
-}