[clang] [llvm] [InstCombine] remove dead loads, such as memcpy from undef (PR #143958)

[Nikita Popov via cfe-commits]

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@@ -112,11 +112,7 @@ declare i1 @fn5(ptr byval({ i32, i32 }) align 4 %r)
 
 define i1 @test5() {
 ; CHECK-LABEL: define i1 @test5() {
-; CHECK-NEXT:    [[TMP1:%.*]] = alloca { i32, i32 }, align 4
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nikic wrote:

Should replace this alloca with an argument to retain test behavior, probably.

https://github.com/llvm/llvm-project/pull/143958
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