[llvm] [AArch64] improve zero-cycle regmov test (PR #143680)

[Florian Hahn via llvm-commits]

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@@ -0,0 +1,45 @@
+; RUN: llc < %s -march=arm64 | FileCheck %s -check-prefixes=NOTCPU --match-full-lines
+; RUN: llc < %s -mtriple=arm64-apple-macosx -mcpu=apple-m1 | FileCheck %s -check-prefixes=CPU --match-full-lines
+; RUN: llc < %s -mtriple=arm64-apple-macosx -mcpu=apple-m1 -mattr=-zcm | FileCheck %s -check-prefixes=NOTATTR --match-full-lines
+; RUN: llc < %s -mtriple=arm64-apple-macosx -mattr=+zcm | FileCheck %s -check-prefixes=ATTR --match-full-lines
+
+define i32 @t(i32 %a, i32 %b, i32 %c, i32 %d) {
+entry:
+; CHECK-LABEL: t:
+; NOTCPU: mov w0, w2
+; NOTCPU: mov w1, w3
+; NOTCPU: mov [[REG2:w[0-9]+]], w3
+; NOTCPU: mov [[REG1:w[0-9]+]], w2
+; NOTCPU: bl {{_?foo}}
+; NOTCPU: mov w0, [[REG1]]
+; NOTCPU: mov w1, [[REG2]]
+
+; CPU: mov [[REG2:x[0-9]+]], x3
+; CPU: mov [[REG1:x[0-9]+]], x2
+; CPU: mov x0, x2
+; CPU: mov x1, x3
+; CPU: bl {{_?foo}}
+; CPU: mov x0, [[REG1]]
+; CPU: mov x1, [[REG2]]
+
+; NOTATTR: mov [[REG2:w[0-9]+]], w3
+; NOTATTR: mov [[REG1:w[0-9]+]], w2
+; NOTATTR: mov w0, w2
+; NOTATTR: mov w1, w3
+; NOTATTR: bl {{_?foo}}
+; NOTATTR: mov w0, [[REG1]]
+; NOTATTR: mov w1, [[REG2]]
+
+; ATTR: mov x0, x2
+; ATTR: mov x1, x3
+; ATTR: mov [[REG2:x[0-9]+]], x3
+; ATTR: mov [[REG1:x[0-9]+]], x2
+; ATTR: bl {{_?foo}}
+; ATTR: mov x0, [[REG1]]
+; ATTR: mov x1, [[REG2]]
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fhahn wrote:

This should probably also check that the call comes next

https://github.com/llvm/llvm-project/pull/143680