[llvm] [InstCombine] Handle trunc to i1 in align assume. (PR #122949)

[Andreas Jonson via llvm-commits]

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@@ -3253,12 +3253,13 @@ Instruction *InstCombinerImpl::visitCallInst(CallInst &CI) {
     // call void @llvm.assume(i1 %D)
     // into
     // call void @llvm.assume(i1 true) [ "align"(i32* [[A]], i64  Constant + 1)]
-    uint64_t AlignMask;
+    uint64_t AlignMask = 1;
     if (EnableKnowledgeRetention &&
-        match(IIOperand,
-              m_SpecificICmp(ICmpInst::ICMP_EQ,
-                             m_And(m_Value(A), m_ConstantInt(AlignMask)),
-                             m_Zero()))) {
+        (match(IIOperand,
+               m_SpecificICmp(ICmpInst::ICMP_EQ,
+                              m_And(m_Value(A), m_ConstantInt(AlignMask)),
+                              m_Zero())) ||
+         match(IIOperand, m_Not(m_Trunc(m_Value(A)))))) {
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andjo403 wrote:

fixed

https://github.com/llvm/llvm-project/pull/122949