ifcvt11.ll
2.05 KB
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; RUN: llc < %s -mtriple=arm-apple-darwin -mcpu=cortex-a8 | FileCheck %s
; rdar://8598427
; Adjust if-converter heuristics to avoid predicating vmrs which can cause
; significant regression.
%struct.xyz_t = type { double, double, double }
define i32 @effie(i32 %tsets, %struct.xyz_t* nocapture %p, i32 %a, i32 %b, i32 %c) nounwind readonly noinline {
; CHECK-LABEL: effie:
entry:
%0 = icmp sgt i32 %tsets, 0
br i1 %0, label %bb.nph, label %bb6
bb.nph: ; preds = %entry
%1 = add nsw i32 %b, %a
%2 = add nsw i32 %1, %c
br label %bb
bb: ; preds = %bb4, %bb.nph
; CHECK: vcmp.f64
; CHECK: vmrs APSR_nzcv, fpscr
%r.19 = phi i32 [ 0, %bb.nph ], [ %r.0, %bb4 ]
%n.08 = phi i32 [ 0, %bb.nph ], [ %10, %bb4 ]
%scevgep10 = getelementptr inbounds %struct.xyz_t, %struct.xyz_t* %p, i32 %n.08, i32 0
%scevgep11 = getelementptr %struct.xyz_t, %struct.xyz_t* %p, i32 %n.08, i32 1
%3 = load double, double* %scevgep10, align 4
%4 = load double, double* %scevgep11, align 4
%5 = fcmp uge double %3, %4
br i1 %5, label %bb3, label %bb1
bb1: ; preds = %bb
; CHECK-NOT: it
; CHECK-NOT: vcmpmi
; CHECK-NOT: vmrsmi
; CHECK: vcmp.f64
; CHECK: vmrs APSR_nzcv, fpscr
%scevgep12 = getelementptr %struct.xyz_t, %struct.xyz_t* %p, i32 %n.08, i32 2
%6 = load double, double* %scevgep12, align 4
%7 = fcmp uge double %3, %6
br i1 %7, label %bb3, label %bb2
bb2: ; preds = %bb1
%8 = add nsw i32 %2, %r.19
br label %bb4
bb3: ; preds = %bb1, %bb
%9 = add nsw i32 %r.19, 1
br label %bb4
bb4: ; preds = %bb3, %bb2
%r.0 = phi i32 [ %9, %bb3 ], [ %8, %bb2 ]
%10 = add nsw i32 %n.08, 1
%exitcond = icmp eq i32 %10, %tsets
br i1 %exitcond, label %bb6, label %bb
bb6: ; preds = %bb4, %entry
%r.1.lcssa = phi i32 [ 0, %entry ], [ %r.0, %bb4 ]
ret i32 %r.1.lcssa
}