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