1; RUN: llc < %s -mtriple=arm-apple-darwin -mcpu=cortex-a8 | FileCheck %s 2; rdar://8598427 3; Adjust if-converter heuristics to avoid predicating vmrs which can cause 4; significant regression. 5 6%struct.xyz_t = type { double, double, double } 7 8define i32 @effie(i32 %tsets, %struct.xyz_t* nocapture %p, i32 %a, i32 %b, i32 %c) nounwind readonly noinline { 9; CHECK: effie: 10entry: 11 %0 = icmp sgt i32 %tsets, 0 12 br i1 %0, label %bb.nph, label %bb6 13 14bb.nph: ; preds = %entry 15 %1 = add nsw i32 %b, %a 16 %2 = add nsw i32 %1, %c 17 br label %bb 18 19bb: ; preds = %bb4, %bb.nph 20; CHECK: vcmpe.f64 21; CHECK: vmrs APSR_nzcv, fpscr 22 %r.19 = phi i32 [ 0, %bb.nph ], [ %r.0, %bb4 ] 23 %n.08 = phi i32 [ 0, %bb.nph ], [ %10, %bb4 ] 24 %scevgep10 = getelementptr inbounds %struct.xyz_t* %p, i32 %n.08, i32 0 25 %scevgep11 = getelementptr %struct.xyz_t* %p, i32 %n.08, i32 1 26 %3 = load double* %scevgep10, align 4 27 %4 = load double* %scevgep11, align 4 28 %5 = fcmp uge double %3, %4 29 br i1 %5, label %bb3, label %bb1 30 31bb1: ; preds = %bb 32; CHECK-NOT: it 33; CHECK-NOT: vcmpemi 34; CHECK-NOT: vmrsmi 35; CHECK: vcmpe.f64 36; CHECK: vmrs APSR_nzcv, fpscr 37 %scevgep12 = getelementptr %struct.xyz_t* %p, i32 %n.08, i32 2 38 %6 = load double* %scevgep12, align 4 39 %7 = fcmp uge double %3, %6 40 br i1 %7, label %bb3, label %bb2 41 42bb2: ; preds = %bb1 43 %8 = add nsw i32 %2, %r.19 44 br label %bb4 45 46bb3: ; preds = %bb1, %bb 47 %9 = add nsw i32 %r.19, 1 48 br label %bb4 49 50bb4: ; preds = %bb3, %bb2 51 %r.0 = phi i32 [ %9, %bb3 ], [ %8, %bb2 ] 52 %10 = add nsw i32 %n.08, 1 53 %exitcond = icmp eq i32 %10, %tsets 54 br i1 %exitcond, label %bb6, label %bb 55 56bb6: ; preds = %bb4, %entry 57 %r.1.lcssa = phi i32 [ 0, %entry ], [ %r.0, %bb4 ] 58 ret i32 %r.1.lcssa 59} 60