[clang] [llvm] [PowerPC] Add intrinsics for rldimi/rlwimi/rlwnm (PR #82968)

[Chen Zheng via cfe-commits]

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@@ -1,61 +1,111 @@
-; All of these ands and shifts should be folded into rlwimi's
-; RUN: llc -verify-machineinstrs < %s -mtriple=ppc32-- -o %t
-; RUN: not grep and %t
-; RUN: not grep srawi %t
-; RUN: not grep srwi %t
-; RUN: not grep slwi %t
-; RUN: grep rlwinm %t | count 8
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s
 
 define i32 @test1(i32 %a) {
+; CHECK-LABEL: test1:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    rlwinm 3, 3, 0, 4, 19
+; CHECK-NEXT:    blr
 entry:
-	%tmp.1 = and i32 %a, 268431360		; <i32> [#uses=1]
-	ret i32 %tmp.1
+  %tmp.1 = and i32 %a, 268431360
+  ret i32 %tmp.1
 }
 
 define i32 @test2(i32 %a) {
+; CHECK-LABEL: test2:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    rldicl 3, 3, 36, 24
+; CHECK-NEXT:    rldicl 3, 3, 28, 32
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chenzheng1030 wrote:

hmm, OK. The `rlwinm` does not match the 64-bit semantic here. Would you please just remove this case. It would be strange to keep it in the rlwinm file now.

Please don't treat rlwinm as a 32-bit instruction. It alters and well defined the high 32 bit of a GPR as well especially the MB/ME are wrapped.

https://github.com/llvm/llvm-project/pull/82968