Vendor import of llvm trunk r256633:

https://llvm.org/svn/llvm-project/llvm/trunk@256633

1 files changed, 96 insertions, 0 deletions

diff --git a/test/Transforms/MergeFunc/no-merge-block-address-different-labels.ll b/test/Transforms/MergeFunc/no-merge-block-address-different-labels.ll
new file mode 100644
index 000000000000..3024a9a76a7e
--- /dev/null
+++ b/test/Transforms/MergeFunc/no-merge-block-address-different-labels.ll
@@ -0,0 +1,96 @@
+; RUN: opt -S -mergefunc < %s | FileCheck %s
+
+; There is a slight different in these two functions, in that the label values
+; are switched. They are thus not mergeable. This tests that block addresses
+; referring to blocks within each respective compared function are correctly
+; ordered.
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Function Attrs: nounwind uwtable
+define i32 @_Z1fi(i32 %i) #0 {
+; CHECK-LABEL: define i32 @_Z1fi
+; CHECK-NEXT: entry:
+; CHECK-NEXT: alloca
+entry:
+  %i.addr = alloca i32, align 4
+  %ret = alloca i32, align 4
+  %l = alloca i8*, align 8
+  store i32 %i, i32* %i.addr, align 4
+  store i32 0, i32* %ret, align 4
+; Right here, this is val_0, and later the if might assign val_1
+  store i8* blockaddress(@_Z1fi, %val_0), i8** %l, align 8
+  %0 = load i32, i32* %i.addr, align 4
+  %and = and i32 %0, 256
+  %cmp = icmp eq i32 %and, 0
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:
+  store i8* blockaddress(@_Z1fi, %val_1), i8** %l, align 8
+  br label %if.end
+
+if.end:
+  %1 = load i8*, i8** %l, align 8
+  br label %indirectgoto
+
+val_0:
+  store i32 12, i32* %ret, align 4
+  br label %end
+
+val_1:
+  store i32 42, i32* %ret, align 4
+  br label %end
+
+end:
+  %2 = load i32, i32* %ret, align 4
+  ret i32 %2
+
+indirectgoto:
+  %indirect.goto.dest = phi i8* [ %1, %if.end ]
+  indirectbr i8* %indirect.goto.dest, [label %val_0, label %val_1]
+}
+
+; Function Attrs: nounwind uwtable
+define i32 @_Z1gi(i32 %i) #0 {
+; CHECK-LABEL: define i32 @_Z1gi
+; CHECK-NEXT: entry:
+; CHECK-NEXT: alloca
+entry:
+  %i.addr = alloca i32, align 4
+  %ret = alloca i32, align 4
+  %l = alloca i8*, align 8
+  store i32 %i, i32* %i.addr, align 4
+  store i32 0, i32* %ret, align 4
+; This time, we store val_1 initially, and later the if might assign val_0
+  store i8* blockaddress(@_Z1gi, %val_1), i8** %l, align 8
+  %0 = load i32, i32* %i.addr, align 4
+  %and = and i32 %0, 256
+  %cmp = icmp eq i32 %and, 0
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:
+  store i8* blockaddress(@_Z1gi, %val_0), i8** %l, align 8
+  br label %if.end
+
+if.end:
+  %1 = load i8*, i8** %l, align 8
+  br label %indirectgoto
+
+val_0:
+  store i32 12, i32* %ret, align 4
+  br label %end
+
+val_1:
+  store i32 42, i32* %ret, align 4
+  br label %end
+
+end:
+  %2 = load i32, i32* %ret, align 4
+  ret i32 %2
+
+indirectgoto:
+  %indirect.goto.dest = phi i8* [ %1, %if.end ]
+  indirectbr i8* %indirect.goto.dest, [label %val_1, label %val_0]
+}
+