[clang] [llvm] Remove mmx 3dnow (PR #96246)

[Craig Topper via cfe-commits]

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@@ -6,16 +6,11 @@
 ; RUN: llc < %s -mtriple=i686-- -mcpu=slm | FileCheck %s -check-prefix=X86-PRFCHWSSE
 ; RUN: llc < %s -mtriple=i686-- -mcpu=btver2 | FileCheck %s -check-prefix=X86-PRFCHWSSE
 ; RUN: llc < %s -mtriple=i686-- -mcpu=btver2 -mattr=-prfchw | FileCheck %s -check-prefix=X86-SSE
-; RUN: llc < %s -mtriple=i686-- -mattr=+3dnow | FileCheck %s -check-prefix=X86-3DNOW
-; RUN: llc < %s -mtriple=i686-- -mattr=+3dnow,+prfchw | FileCheck %s -check-prefix=X86-3DNOW
+; RUN: llc < %s -mtriple=i686-- -mattr=+prfchw | FileCheck %s -check-prefix=X86-PRFCHWSSE
 
 ; Rules:
-; 3dnow by itself get you just the single prefetch instruction with no hints
 ; sse provides prefetch0/1/2/nta
-; supporting prefetchw, but not 3dnow implicitly provides prefetcht0/1/2/nta regardless of sse setting as we need something to fall back to for the non-write hint.
-; 3dnow prefetch instruction will only get used if you have no other prefetch instructions enabled
-
-; rdar://10538297
+; supporting prefetchw implicitly provides prefetcht0/1/2/nta as well, as we need something to fall back to for the non-write hint.
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topperc wrote:

nevermind that's the `-mattr=+prfchw` RUN line. It was collapsed in the github view so I didn't see it.

https://github.com/llvm/llvm-project/pull/96246