[llvm] [AMDGPU] Allocate i1 argument to SGPRs (PR #72461)

[Matt Arsenault via llvm-commits]

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@@ -233,7 +241,15 @@ struct AMDGPUOutgoingArgHandler : public AMDGPUOutgoingValueHandler {
   void assignValueToReg(Register ValVReg, Register PhysReg,
                         const CCValAssign &VA) override {
     MIB.addUse(PhysReg, RegState::Implicit);
-    Register ExtReg = extendRegisterMin32(*this, ValVReg, VA);
+    Register ExtReg;
+
+    if (VA.getLocVT().getSizeInBits() == 1 &&
+        MRI.getTargetRegisterInfo()->getRegSizeInBits(PhysReg, MRI) == 64) {
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arsenm wrote:

Ditto

https://github.com/llvm/llvm-project/pull/72461