[AArch64] Fix scheduling info for Armv8.4-a LDAPUR* instructions by c-rhodes · Pull Request #171637 · llvm/llvm-project

c-rhodes · 2025-12-10T15:27:21Z

They were using the wrong scheduler resource. They're also missing from the optimisation guides, but WriteLD should be closer at least.

davemgreen

Thanks

llvmbot · 2025-12-10T17:18:28Z

@llvm/pr-subscribers-backend-aarch64

Author: Cullen Rhodes (c-rhodes)

Changes

They were using the wrong scheduler resource. They're also missing from the optimisation guides, but WriteLD should be closer at least.

Patch is 37.03 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/171637.diff

7 Files Affected:

(modified) llvm/lib/Target/AArch64/AArch64InstrFormats.td (+1-1)
(modified) llvm/test/tools/llvm-mca/AArch64/Neoverse/N2-rcpc-immo-instructions.s (+19-19)
(modified) llvm/test/tools/llvm-mca/AArch64/Neoverse/N3-rcpc-immo-instructions.s (+19-19)
(modified) llvm/test/tools/llvm-mca/AArch64/Neoverse/V1-rcpc-immo-instructions.s (+19-19)
(modified) llvm/test/tools/llvm-mca/AArch64/Neoverse/V2-rcpc-immo-instructions.s (+19-19)
(modified) llvm/test/tools/llvm-mca/AArch64/Neoverse/V3-rcpc-immo-instructions.s (+19-19)
(modified) llvm/test/tools/llvm-mca/AArch64/Neoverse/V3AE-rcpc-immo-instructions.s (+19-19)

diff --git a/llvm/lib/Target/AArch64/AArch64InstrFormats.td b/llvm/lib/Target/AArch64/AArch64InstrFormats.td
index 4d2e740779961..892b8ee1ed3cb 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrFormats.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrFormats.td
@@ -4386,7 +4386,7 @@ multiclass BaseLoadUnscaleV84<string asm, bits<2> sz, bits<2> opc,
                               DAGOperand regtype > {
   def i : BaseLoadStoreUnscale<sz, 0, opc, (outs regtype:$Rt),
                                (ins GPR64sp:$Rn, simm9:$offset), asm, []>,
-          Sched<[WriteST]> {
+          Sched<[WriteLD]> {
     let Inst{29} = 0;
     let Inst{24} = 1;
   }
diff --git a/llvm/test/tools/llvm-mca/AArch64/Neoverse/N2-rcpc-immo-instructions.s b/llvm/test/tools/llvm-mca/AArch64/Neoverse/N2-rcpc-immo-instructions.s
index cd3d7e0bf1b57..d9943f342b827 100644
--- a/llvm/test/tools/llvm-mca/AArch64/Neoverse/N2-rcpc-immo-instructions.s
+++ b/llvm/test/tools/llvm-mca/AArch64/Neoverse/N2-rcpc-immo-instructions.s
@@ -10,15 +10,15 @@
 # CHECK-NEXT: [6]: HasSideEffects (U)
 
 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
-# CHECK-NEXT:  2      1     0.50    *                   ldapur	w7, [x24]
-# CHECK-NEXT:  2      1     0.50    *                   ldapur	x20, [x13]
-# CHECK-NEXT:  2      1     0.50    *                   ldapurb	w13, [x17]
-# CHECK-NEXT:  2      1     0.50    *                   ldapurh	w3, [x22]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursb	w7, [x8]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursb	x29, [x7]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursh	w17, [x19]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursh	x3, [x3]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursw	x3, [x18]
+# CHECK-NEXT:  1      4     0.33    *                   ldapur	w7, [x24]
+# CHECK-NEXT:  1      4     0.33    *                   ldapur	x20, [x13]
+# CHECK-NEXT:  1      4     0.33    *                   ldapurb	w13, [x17]
+# CHECK-NEXT:  1      4     0.33    *                   ldapurh	w3, [x22]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursb	w7, [x8]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursb	x29, [x7]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursh	w17, [x19]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursh	x3, [x3]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursw	x3, [x18]
 # CHECK-NEXT:  2      1     0.50           *            stlur	w3, [x27]
 # CHECK-NEXT:  2      1     0.50           *            stlur	x23, [x25]
 # CHECK-NEXT:  2      1     0.50           *            stlurb	w30, [x17]
@@ -41,19 +41,19 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0.0]  [0.1]  [1.0]  [1.1]  [2]    [3.0]  [3.1]  [4]    [5]    [6.0]  [6.1]  [7]    [8]
-# CHECK-NEXT:  -      -     6.50   6.50    -     6.50   6.50    -      -      -      -      -      -
+# CHECK-NEXT:  -      -     2.00   2.00   3.00   5.00   5.00    -      -      -      -      -      -
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0.0]  [0.1]  [1.0]  [1.1]  [2]    [3.0]  [3.1]  [4]    [5]    [6.0]  [6.1]  [7]    [8]    Instructions:
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapur	w7, [x24]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapur	x20, [x13]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapurb	w13, [x17]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapurh	w3, [x22]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursb	w7, [x8]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursb	x29, [x7]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursh	w17, [x19]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursh	x3, [x3]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursw	x3, [x18]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapur	w7, [x24]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapur	x20, [x13]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapurb	w13, [x17]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapurh	w3, [x22]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursb	w7, [x8]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursb	x29, [x7]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursh	w17, [x19]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursh	x3, [x3]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursw	x3, [x18]
 # CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     stlur	w3, [x27]
 # CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     stlur	x23, [x25]
 # CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     stlurb	w30, [x17]
diff --git a/llvm/test/tools/llvm-mca/AArch64/Neoverse/N3-rcpc-immo-instructions.s b/llvm/test/tools/llvm-mca/AArch64/Neoverse/N3-rcpc-immo-instructions.s
index 6faa5e1f4db1b..d5302e96edf4e 100644
--- a/llvm/test/tools/llvm-mca/AArch64/Neoverse/N3-rcpc-immo-instructions.s
+++ b/llvm/test/tools/llvm-mca/AArch64/Neoverse/N3-rcpc-immo-instructions.s
@@ -10,15 +10,15 @@
 # CHECK-NEXT: [6]: HasSideEffects (U)
 
 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
-# CHECK-NEXT:  2      1     0.50    *                   ldapur	w7, [x24]
-# CHECK-NEXT:  2      1     0.50    *                   ldapur	x20, [x13]
-# CHECK-NEXT:  2      1     0.50    *                   ldapurb	w13, [x17]
-# CHECK-NEXT:  2      1     0.50    *                   ldapurh	w3, [x22]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursb	w7, [x8]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursb	x29, [x7]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursh	w17, [x19]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursh	x3, [x3]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursw	x3, [x18]
+# CHECK-NEXT:  1      4     0.33    *                   ldapur	w7, [x24]
+# CHECK-NEXT:  1      4     0.33    *                   ldapur	x20, [x13]
+# CHECK-NEXT:  1      4     0.33    *                   ldapurb	w13, [x17]
+# CHECK-NEXT:  1      4     0.33    *                   ldapurh	w3, [x22]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursb	w7, [x8]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursb	x29, [x7]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursh	w17, [x19]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursh	x3, [x3]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursw	x3, [x18]
 # CHECK-NEXT:  2      1     0.50           *            stlur	w3, [x27]
 # CHECK-NEXT:  2      1     0.50           *            stlur	x23, [x25]
 # CHECK-NEXT:  2      1     0.50           *            stlurb	w30, [x17]
@@ -41,19 +41,19 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0.0]  [0.1]  [1.0]  [1.1]  [2]    [3.0]  [3.1]  [4]    [5]    [6.0]  [6.1]  [7]    [8]
-# CHECK-NEXT:  -      -     6.50   6.50    -     6.50   6.50    -      -      -      -      -      -
+# CHECK-NEXT:  -      -     2.00   2.00   3.00   5.00   5.00    -      -      -      -      -      -
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0.0]  [0.1]  [1.0]  [1.1]  [2]    [3.0]  [3.1]  [4]    [5]    [6.0]  [6.1]  [7]    [8]    Instructions:
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapur	w7, [x24]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapur	x20, [x13]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapurb	w13, [x17]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapurh	w3, [x22]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursb	w7, [x8]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursb	x29, [x7]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursh	w17, [x19]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursh	x3, [x3]
-# CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     ldapursw	x3, [x18]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapur	w7, [x24]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapur	x20, [x13]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapurb	w13, [x17]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapurh	w3, [x22]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursb	w7, [x8]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursb	x29, [x7]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursh	w17, [x19]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursh	x3, [x3]
+# CHECK-NEXT:  -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -     ldapursw	x3, [x18]
 # CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     stlur	w3, [x27]
 # CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     stlur	x23, [x25]
 # CHECK-NEXT:  -      -     0.50   0.50    -     0.50   0.50    -      -      -      -      -      -     stlurb	w30, [x17]
diff --git a/llvm/test/tools/llvm-mca/AArch64/Neoverse/V1-rcpc-immo-instructions.s b/llvm/test/tools/llvm-mca/AArch64/Neoverse/V1-rcpc-immo-instructions.s
index 5c9b43a0e5121..dcea382de5fa9 100644
--- a/llvm/test/tools/llvm-mca/AArch64/Neoverse/V1-rcpc-immo-instructions.s
+++ b/llvm/test/tools/llvm-mca/AArch64/Neoverse/V1-rcpc-immo-instructions.s
@@ -10,15 +10,15 @@
 # CHECK-NEXT: [6]: HasSideEffects (U)
 
 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
-# CHECK-NEXT:  2      1     0.50    *                   ldapur	w7, [x24]
-# CHECK-NEXT:  2      1     0.50    *                   ldapur	x20, [x13]
-# CHECK-NEXT:  2      1     0.50    *                   ldapurb	w13, [x17]
-# CHECK-NEXT:  2      1     0.50    *                   ldapurh	w3, [x22]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursb	w7, [x8]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursb	x29, [x7]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursh	w17, [x19]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursh	x3, [x3]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursw	x3, [x18]
+# CHECK-NEXT:  1      4     0.33    *                   ldapur	w7, [x24]
+# CHECK-NEXT:  1      4     0.33    *                   ldapur	x20, [x13]
+# CHECK-NEXT:  1      4     0.33    *                   ldapurb	w13, [x17]
+# CHECK-NEXT:  1      4     0.33    *                   ldapurh	w3, [x22]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursb	w7, [x8]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursb	x29, [x7]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursh	w17, [x19]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursh	x3, [x3]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursw	x3, [x18]
 # CHECK-NEXT:  2      1     0.50           *            stlur	w3, [x27]
 # CHECK-NEXT:  2      1     0.50           *            stlur	x23, [x25]
 # CHECK-NEXT:  2      1     0.50           *            stlurb	w30, [x17]
@@ -46,19 +46,19 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0.0]  [0.1]  [1.0]  [1.1]  [2.0]  [2.1]  [2.2]  [3]    [4.0]  [4.1]  [5]    [6]    [7.0]  [7.1]  [8]    [9]    [10]   [11]
-# CHECK-NEXT:  -      -     6.50   6.50    -      -      -      -     6.50   6.50    -      -      -      -      -      -      -      -
+# CHECK-NEXT:  -      -     2.00   2.00    -      -      -     3.00   5.00   5.00    -      -      -      -      -      -      -      -
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0.0]  [0.1]  [1.0]  [1.1]  [2.0]  [2.1]  [2.2]  [3]    [4.0]  [4.1]  [5]    [6]    [7.0]  [7.1]  [8]    [9]    [10]   [11]   Instructions:
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapur	w7, [x24]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapur	x20, [x13]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapurb	w13, [x17]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapurh	w3, [x22]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapursb	w7, [x8]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapursb	x29, [x7]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapursh	w17, [x19]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapursh	x3, [x3]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     ldapursw	x3, [x18]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapur	w7, [x24]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapur	x20, [x13]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapurb	w13, [x17]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapurh	w3, [x22]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapursb	w7, [x8]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapursb	x29, [x7]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapursh	w17, [x19]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapursh	x3, [x3]
+# CHECK-NEXT:  -      -      -      -      -      -      -     0.33   0.33   0.33    -      -      -      -      -      -      -      -     ldapursw	x3, [x18]
 # CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     stlur	w3, [x27]
 # CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     stlur	x23, [x25]
 # CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -     stlurb	w30, [x17]
diff --git a/llvm/test/tools/llvm-mca/AArch64/Neoverse/V2-rcpc-immo-instructions.s b/llvm/test/tools/llvm-mca/AArch64/Neoverse/V2-rcpc-immo-instructions.s
index 71fd689522215..dfcc202192392 100644
--- a/llvm/test/tools/llvm-mca/AArch64/Neoverse/V2-rcpc-immo-instructions.s
+++ b/llvm/test/tools/llvm-mca/AArch64/Neoverse/V2-rcpc-immo-instructions.s
@@ -10,15 +10,15 @@
 # CHECK-NEXT: [6]: HasSideEffects (U)
 
 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
-# CHECK-NEXT:  2      1     0.50    *                   ldapur	w7, [x24]
-# CHECK-NEXT:  2      1     0.50    *                   ldapur	x20, [x13]
-# CHECK-NEXT:  2      1     0.50    *                   ldapurb	w13, [x17]
-# CHECK-NEXT:  2      1     0.50    *                   ldapurh	w3, [x22]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursb	w7, [x8]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursb	x29, [x7]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursh	w17, [x19]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursh	x3, [x3]
-# CHECK-NEXT:  2      1     0.50                  U     ldapursw	x3, [x18]
+# CHECK-NEXT:  1      4     0.33    *                   ldapur	w7, [x24]
+# CHECK-NEXT:  1      4     0.33    *                   ldapur	x20, [x13]
+# CHECK-NEXT:  1      4     0.33    *                   ldapurb	w13, [x17]
+# CHECK-NEXT:  1      4     0.33    *                   ldapurh	w3, [x22]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursb	w7, [x8]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursb	x29, [x7]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursh	w17, [x19]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursh	x3, [x3]
+# CHECK-NEXT:  1      4     0.33                  U     ldapursw	x3, [x18]
 # CHECK-NEXT:  2      1     0.50           *            stlur	w3, [x27]
 # CHECK-NEXT:  2      1     0.50           *            stlur	x23, [x25]
 # CHECK-NEXT:  2      1     0.50           *            stlurb	w30, [x17]
@@ -48,19 +48,19 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0.0]  [0.1]  [1.0]  [1.1]  [2.0]  [2.1]  [2.2]  [3]    [4.0]  [4.1]  [5]    [6]    [7]    [8]    [9]    [10]   [11]   [12]   [13]   [14]
-# CHECK-NEXT:  -      -     6.50   6.50    -      -      -      -     6.50   6.50    -      -      -      -      -      -      -      -      -      -
+# CHECK-NEXT:  -      -     2.00   2.00    -      -      -     3.00   5.00   5.00    -      -      -      -      -      -      -      -      -      -
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0.0]  [0.1]  [1.0]  [1.1]  [2.0]  [2.1]  [2.2]  [3]    [4.0]  [4.1]  [5]    [6]    [7]    [8]    [9]    [10]   [11]   [12]   [13]   [14]   Instructions:
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -      -      -     ldapur	w7, [x24]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -      -      -     ldapur	x20, [x13]
-# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -      -     ...
[truncated]

…m#171637) They were using the wrong scheduler resource. They're also missing from the optimisation guides, but WriteLD should be closer at least.

[AArch64] Fix scheduling info for Armv8.4-a LDAPUR* instructions

f607d8f

They were using the wrong scheduler resource. They're also missing from the optimisation guides, but WriteLD should be closer at least.

c-rhodes requested review from Asher8118, davemgreen and sjoerdmeijer December 10, 2025 15:27

c-rhodes mentioned this pull request Dec 10, 2025

[AArch64] Mark Armv8.4-a LDAPUR* instructions as mayLoad #171142

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davemgreen approved these changes Dec 10, 2025

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llvmbot added the backend:AArch64 label Dec 10, 2025

c-rhodes merged commit 4d335cb into llvm:main Dec 11, 2025
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[AArch64] Fix scheduling info for Armv8.4-a LDAPUR* instructions#171637

[AArch64] Fix scheduling info for Armv8.4-a LDAPUR* instructions#171637
c-rhodes merged 1 commit intollvm:mainfrom
c-rhodes:armv8.4-rcpc-immo-ldapur-fix-sched-info

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