| ; RUN: opt -licm -verify-memoryssa -S < %s | FileCheck %s |
| |
| ; Function Attrs: noinline norecurse nounwind readnone ssp uwtable |
| define zeroext i1 @invariant_denom(double %v) #0 { |
| entry: |
| ; CHECK-LABEL: @invariant_denom( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: fdiv fast double 1.000000e+00, %v |
| br label %loop |
| |
| loop: ; preds = %entry, %loop |
| %v3 = phi i32 [ 0, %entry ], [ %v11, %loop ] |
| %v4 = phi i32 [ 0, %entry ], [ %v12, %loop ] |
| %v5 = uitofp i32 %v4 to double |
| |
| ; CHECK-LABEL: loop: |
| ; CHECK: fmul fast double |
| ; CHECK-NOT: fdiv |
| %v6 = fdiv fast double %v5, %v |
| %v7 = fptoui double %v6 to i64 |
| %v8 = and i64 %v7, 1 |
| %v9 = xor i64 %v8, 1 |
| %v10 = trunc i64 %v9 to i32 |
| %v11 = add i32 %v10, %v3 |
| %v12 = add nuw i32 %v4, 1 |
| %v13 = icmp eq i32 %v12, -1 |
| br i1 %v13, label %end, label %loop |
| |
| end: ; preds = %loop |
| %v15 = phi i32 [ %v11, %loop ] |
| %v16 = icmp ne i32 %v15, 0 |
| ret i1 %v16 |
| } |
| |
| define void @invariant_fdiv(float* %out, float %arg) { |
| ; CHECK-LABEL: @invariant_fdiv( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: %div = fdiv fast float 4.000000e+00, %arg |
| ; CHECK-NEXT: fmul fast float %div, 0x41F0000000000000 |
| entry: |
| br label %loop |
| |
| loop: ; preds = %loop, %entry |
| %ind = phi i32 [ 0, %entry ], [ %inc, %loop ] |
| |
| ; CHECK-LABEL: loop: |
| ; CHECK: getelementptr |
| ; CHECK-NOT: fdiv |
| ; CHECK-NOT: fmul |
| %div = fdiv fast float 4.000000e+00, %arg |
| %mul = fmul fast float %div, 0x41F0000000000000 |
| %gep = getelementptr inbounds float, float* %out, i32 %ind |
| store float %mul, float* %gep, align 4 |
| %inc = add nuw nsw i32 %ind, 1 |
| %cond = icmp eq i32 %inc, 1024 |
| br i1 %cond, label %exit, label %loop |
| |
| exit: ; preds = %loop |
| ret void |
| } |