fix PR8753, eliminating a case where we'd infinitely make a
substitution because it doesn't actually change the IR. Patch by
Jakub Staszak!
llvm-svn: 121361
diff --git a/llvm/test/Transforms/MemCpyOpt/crash.ll b/llvm/test/Transforms/MemCpyOpt/crash.ll
index bf5b234..cc3a6b0 100644
--- a/llvm/test/Transforms/MemCpyOpt/crash.ll
+++ b/llvm/test/Transforms/MemCpyOpt/crash.ll
@@ -1,5 +1,4 @@
-; RUN: opt < %s -memcpyopt -disable-output
-; PR4882
+; RUN: opt < %s -basicaa -memcpyopt -disable-output
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
target triple = "armv7-eabi"
@@ -7,7 +6,8 @@
%struct.qw = type { [4 x float] }
%struct.bar = type { %struct.qw, %struct.qw, %struct.qw, %struct.qw, %struct.qw, float, float}
-define arm_aapcs_vfpcc void @test1(%struct.bar* %this) {
+; PR4882
+define void @test1(%struct.bar* %this) {
entry:
%0 = getelementptr inbounds %struct.bar* %this, i32 0, i32 0, i32 0, i32 0
store float 0.000000e+00, float* %0, align 4
@@ -43,3 +43,16 @@
store float 0.000000e+00, float* %15, align 4
unreachable
}
+
+; PR8753
+
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32,
+i1) nounwind
+
+define void @test2(i32 %cmd) nounwind {
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* undef, i8* undef, i64 20, i32 1, i1
+false) nounwind
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* null, i8* undef, i64 20, i32 1, i1
+false) nounwind
+ ret void
+}