commit 4d7a0abae8b40482a44c22257b2e86c6fa89547c
author Sergei Barannikov <barannikov88@gmail.com> Tue Aug 27 22:59:33 2024 +0300
committer GitHub <noreply@github.com> Tue Aug 27 22:59:33 2024 +0300
tree c9dbeb73b130b9f86e4540ad413a2a557ea9d5db
parent 29bb523b7c3502b47737ced2a8b20678809ec9de

[DataLayout] Change return type of `getStackAlignment` to `MaybeAlign` (#105478)

Currently, `getStackAlignment` asserts if the stack alignment wasn't
specified. This makes it inconvenient to use and complicates testing.

This change also makes `exceedsNaturalStackAlignment` method redundant.

llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp

diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 3fece81..f818c4e 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -9136,8 +9136,8 @@
     // realignment.
     const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
     if (!TRI->hasStackRealignment(MF))
-      while (NewAlign > Alignment && DL.exceedsNaturalStackAlignment(NewAlign))
-        NewAlign = NewAlign.previous();
+      if (MaybeAlign StackAlign = DL.getStackAlignment())
+        NewAlign = std::min(NewAlign, *StackAlign);
 
     if (NewAlign > Alignment) {
       Alignment = NewAlign;
@@ -9244,8 +9244,8 @@
     // realignment.
     const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
     if (!TRI->hasStackRealignment(MF))
-      while (NewAlign > Alignment && DL.exceedsNaturalStackAlignment(NewAlign))
-        NewAlign = NewAlign.previous();
+      if (MaybeAlign StackAlign = DL.getStackAlignment())
+        NewAlign = std::min(NewAlign, *StackAlign);
 
     if (NewAlign > Alignment) {
       Alignment = NewAlign;