test/CodeGen/Hexagon/swp-ws-pragma-initiation-interval-fail.mir

# RUN: llc --mtriple=hexagon %s -run-pass=pipeliner -debug-only=pipeliner \
# RUN: -window-sched=force -filetype=null -verify-machineinstrs 2>&1 \
# RUN: | FileCheck %s
# REQUIRES: asserts

# Test that checks no window scheduler is performed if the II set by pragma was
# enabled

# CHECK: Window scheduling is disabled when llvm.loop.pipeline.initiationinterval is set.

--- |
  define void @test_pragma_ii_fail(ptr %a0, i32 %a1) {
  b0:
    %v0 = icmp sgt i32 %a1, 1
    br i1 %v0, label %b1, label %b4

  b1:                                               ; preds = %b0
    %v1 = load i32, ptr %a0, align 4
    %v2 = add i32 %v1, 10
    %v4 = add i32 %a1, -1
    %cgep = getelementptr i32, ptr %a0, i32 1
    br label %b2

  b2:                                               ; preds = %b2, %b1
    %v5 = phi i32 [ %v12, %b2 ], [ %v4, %b1 ]
    %v6 = phi ptr [ %cgep2, %b2 ], [ %cgep, %b1 ]
    %v7 = phi i32 [ %v10, %b2 ], [ %v2, %b1 ]
    store i32 %v7, ptr %v6, align 4
    %v8 = add i32 %v7, 10
    %cgep1 = getelementptr i32, ptr %v6, i32 -1
    store i32 %v8, ptr %cgep1, align 4
    %v10 = add i32 %v7, 10
    %v12 = add i32 %v5, -1
    %v13 = icmp eq i32 %v12, 0
    %cgep2 = getelementptr i32, ptr %v6, i32 1
    br i1 %v13, label %b4, label %b2, !llvm.loop !0

  b4:                                               ; preds = %b2, %b0
    ret void
  }

  !0 = distinct !{!0, !1}
  !1 = !{!"llvm.loop.pipeline.initiationinterval", i32 2}
...
---
name:            test_pragma_ii_fail
tracksRegLiveness: true
body:             |
  bb.0.b0:
    successors: %bb.1(0x40000000), %bb.3(0x40000000)
    liveins: $r0, $r1
  
    %0:intregs = COPY $r1
    %1:intregs = COPY $r0
    %2:predregs = C2_cmpgti %0, 1
    J2_jumpf %2, %bb.3, implicit-def dead $pc
    J2_jump %bb.1, implicit-def dead $pc
  
  bb.1.b1:
    successors: %bb.2(0x80000000)
  
    %3:intregs, %4:intregs = L2_loadri_pi %1, 4
    %5:intregs = A2_addi killed %3, 10
    %6:intregs = A2_addi %0, -1
    %7:intregs = COPY %6
    J2_loop0r %bb.2, %7, implicit-def $lc0, implicit-def $sa0, implicit-def $usr
  
  bb.2.b2 (machine-block-address-taken):
    successors: %bb.3(0x04000000), %bb.2(0x7c000000)
  
    %8:intregs = PHI %4, %bb.1, %9, %bb.2
    %10:intregs = PHI %5, %bb.1, %11, %bb.2
    S2_storeri_io %8, 0, %10
    %11:intregs = A2_addi %10, 10
    S2_storeri_io %8, -4, %11
    %9:intregs = A2_addi %8, 4
    ENDLOOP0 %bb.2, implicit-def $pc, implicit-def $lc0, implicit $sa0, implicit $lc0
    J2_jump %bb.3, implicit-def dead $pc
  
  bb.3.b4:
    PS_jmpret $r31, implicit-def dead $pc

...