[llvm] [StackColoring] Delete dead stack slots (PR #72633)

[Nikita Popov via llvm-commits]

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@@ -0,0 +1,32 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
+; RUN:   | FileCheck %s -check-prefix=RV32I
+; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
+; RUN:   | FileCheck %s -check-prefix=RV64I
+
+; Remove the lifetime-marked alloca, but not the unmarked one.
+define dso_local signext i32 @f1() nounwind {
+; RV32I-LABEL: f1:
+; RV32I:       # %bb.0:
+; RV32I-NEXT:    addi sp, sp, -32
+; RV32I-NEXT:    li a0, 0
+; RV32I-NEXT:    addi sp, sp, 32
+; RV32I-NEXT:    ret
+;
+; RV64I-LABEL: f1:
+; RV64I:       # %bb.0:
+; RV64I-NEXT:    addi sp, sp, -32
+; RV64I-NEXT:    li a0, 0
+; RV64I-NEXT:    addi sp, sp, 32
+; RV64I-NEXT:    ret
+  %1 = alloca [32 x i8], align 4
+  %2 = alloca [32 x i8], align 4
+  %3 = getelementptr inbounds [32 x i8], [32 x i8]* %1, i64 0, i64 0
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nikic wrote:

Use typed pointer IR.

https://github.com/llvm/llvm-project/pull/72633